Cast Roll forged roll

Rolls
SINO EQUIPMENT Page 1 of 27
Office: No.1 Beihuayuanjie, Sanjianfang, Chaoyang, Beijing 100024, China www.sinosteelengineering.com
Tel: +861057280067 Cell: 0086-13811497114 market@sinosteelengineering.com
CATALOGUE
CAST ROLLS & FORGED ROLLS
BEIJING SINO STEEL ENGINEERING & EQUIPMENT CO., LTD.
January 01, 2015

Rolls
CONTENTS
1, CASTING ROLLS
2, FORGED ROLLS
PRODUCTION EQUIPMENT:
Introduction furnace: 25tx8sets, 10t/3tx5sets
EAF: 30tx5sets
LF furnace: 50-70tx8sets
Large send Foundry equipment: 20 sets
Large & Middle size heat treatment: 50 sets
Large & Middle size centrifugal casting machine: 20 sets
Large & Middle size CNC & Heavy machine: 235 sets
Testing equipment: 35 sets
PRODUCTION CAPACITY: 150000Tons/Annual
TYPE & SIZE:
CAST ROLL & RING：
Backup roll: Max. Dia. 2000mm; Max weight 80t/pc,
Work roll: Max. Dia. 1600mm; Max. Barrel length 6500mm;
Max weight 85t/pc
Others: as per customer’s requirement.
FORGED ROLL & RING：
Work roll for Cold Rolling mill: Max. Dia. 1100mm; Max weight 25t/pc,
Work roll for Hot Rolling mill: Max. Dia. 1600mm; Max weight 75t/pc
Backup roll for Hot Rolling mill: Max. Dia. 2000mm; Max weight 75t/pc
Others: as per customer’s requirement.

Rolls

Rolls
1. CAST ROLLS MAKING


SMALTING
FOUNDRY & CASTING
Direct-reading
spectrograph
Ultrasonic detector
PEELING
HEAT
TREATMENT
MACHINING
HARDNESS INSPECTING
PACKING
Metallurgical analysis
HPLC Analysis

Rolls
Static Casting
The shell and core are the monobloc material in static cast rolls. By the control of techniques of
cooling speed and heat treatment, the static roll can get the performance requested on shell and
roll neck. The static casting is widely used to produce rolls for roughing mills, section mill, rail and
beam mills, universal mills, edge mills as well as wire mills, rod mills. Top pour casting and bottom
pour casting are applied in our production.
Pic.1 Top Pour Casting Pic.2 Bottom Pour Casting

Rolls
Centrifugal Casting
Centrifugal casting allows us to produce rolls made from two different materials – one of which forms
the surface part of the barrel that is wearable and heat resistant while the other makes up the core
with good mechanical resistance.
I. Horizontal Centrifugal Cast
Mould of horizontal centrifugal casting is placed horizontally.
Features:
1.The thickness of the layer at the upper end and lower end is almost homogeneous.
2.Porosity defect is easily to form in the final solidification zone of the outer layer. More outer layer
needs to be melted during the core filling. Cost will be increased as well as core feature be
affected.
3.Iron liquid is spreading at a slow rate in the mould cavity.

Rolls
II. Vertical Centrifugal Cast
Mould of vertical centrifugal casting is placed vertically.
Features:
1.The crystal structure is compact.
2.During casting, the inside surface of the mould cavity is not easily subject to oxidization. It is
beneficial for the sound metallurgical combination of outer layer and core, suitable for the
production of high alloy compound rolls.
3.The thickness of outer layer at the upper end and lower end of the barrel is different.

Rolls
Heat Treatment of Cast Roll
A high level of residual stress inside of the cast iron rolls is a result of the combination of the heat
stress and structural stress. It might cause change in the roll shape and dimension during the
machining. Some residual stress (for example, the high residual tensile stress at the core) will result
in a negative impact on its application. Therefore, all the cast iron rolls must undergo annealing
treatment to release the stress. Some cast rolls even require for a normalization treatment.
According to the actual demand of roll production, we have been equipped with the domestically
most advanced heat treatment furnace. The furnaces are equipped with electric radiation units and
fans for enhanced circulation of the furnace atmosphere. The temperature and cycle times are
capable of maintaining distribution and accuracy within 10 °C, so as to guarantee uniform hardness.
Pic.1 Heat Treatment of Sleeves

Rolls
ALLOY CAST STEEL ROLL
◆ ADVANTAGE
◇ High tensile strength
◇ High wearability
◇ Good toughness
◇ Excellent resistance to fire crack
◆ MECHANICAL PROPERTIES & APPLICATION
Symbol
Hardness
(HS)
Tensile
Strength
(MPa)
Elongation
(%)
Application
AS60A 45-55 ＞700 ＞8
Bloomer and slab mills, rougher of large section
mills
AS70A 34-44 ＞680 ＞7
Rougher of section, bar and rod mills,
Rougher of narrow strip mills,
Vertical scale-breaking rolls.
AS70B 36-46 ＞680 ＞7
AS75 36-46 ＞680 ＞6
AS75A 35-55 ＞800 ＞7
AS75B 40-60 ＞800 ＞7
Bloomer and slab mills,
Back-up rolls of narrow strip mills.
◆ SUMMARY
They are made of high quality steel melted
with electric arc furnace (EAF) and finished
with advanced foundry and heat treatment
technologies.
Roll barrel is mainly composed of pearlite (or
temper sorbite) in the microstructure.

SINOSTEEL
ADAMITE ROLLS
◆ ADVANTAGE
◇ No hardness gradient in the working layer
◇ Good toughness
◇ Good resistance to fire crack
◆ APPLICATION
◇ For hot strip rolling line: Rougher and front stands of the finishers.
◇ For bar and wire rolling line: Rougher, intermediate stands and pre-finishing stands.
◇ For universal mills and cantilever mills: Roll rings and roll sleeves.
◆ MECHANICAL PROPERTIES
※1 Tensile strength
Symbol
Hardness
(HS)
TS※1
(MPa)
Elongation
(%)
Application
AD140A 35~50 500~800 ≥1.0
Bloomer, slab mill, rougher with large
section
AD160A 40~60 500~800 ≥1.0 Rougher, bar and rod mill,
narrow strip mill,
vertical scale-breaking rolls.AD180A-AD220 50~60 450~700 ≥0.5
AD GT 55~65 690~850 ≥0.5
Finish stands with large section, Roll rings
and roll sleeves.
◆ SUMMARY
Adamite is one kind of special material with
elements such as Ni、Cr、Mo etc. Special
heat treatment is used. Its mechanical
properties and carbon content is between
steel and iron.
It is shaped by Centrifugal Casting Machine,
or by gravity casting.

GRAPHITE STEEL ROLLS
◆ ADVANTAGE
◇ No hardness gradient in the working layer
◇ Good toughness
◇ Excellent resistance to fire crack
— Better than Adamite rolls
◇ Preventing oxidized scales from adhering
◆ APPLICATION
◇ Bloomer or rougher for bar , rod and hot strip mills
◇ Roll rings and roll sleeves for universal mills
Symbol
Hardness
(HS)
Tensile strength
(MPa)
Elongation
(%)
GS140A 36-46 540-800 ≥1.0
GS160A 40-60 500-750 ≥1.0
◆ SUMMARY
It is one kind of special material with a small
amount of graphite in its microstructure. Its
mechanical properties and carbon content
are between steel and iron. It is shaped by
gravity casting.

HIGH SPEED STEEL ROLLS
◆ ADVANTAGE
◇ HIGH HARDNESS
The hardness of roll working layer to reach
as high as 80-85HSC with the control of
element composition and heat treatment.
◇ GOOD WEAR RESISTANCE AT HIGH TEMPERATURE
It ensures good wear resistance at high temperature
and uniform wear in the roll passes, as the important
metal elements are uniformly distributed in the
martensitic structure, such as V (Vanadium),
W (Tungsten), Nb (Niobium) and Mo (Molybdenum).
◇ IMPROVING OF SURFACE QUALITY OF ROLLED PIECE
◆ APPLICATION
◇ Work rolls of finishing stands for hot strip mills
◇ Work rolls of finishing stands for hot bar mills
◇ Pre-finishing stands for high-speed wire mills
Item
Position
Hardness
(HS)
Tensile strength
(MPa)
Modulus of elasticity
(×10
3
MPa)
Work layer 80~85 700~900 210~240
core — ≥400 140~180
◆ SUMMARY
The working layer of HSS rolls are made of
alloy V, W, Nb and Mo, and shaped in
Centrifugal Casting Machine, with spheroidal
graphite cast iron in its core.

ALLOY INDEFINITE CHILLED CAST IRON ROLLS
◆ CHARACTERISTICS
◇ In its microstructure, the size, shape and distribution
of graphite and carbide are controlled by chilling
effect and the contents of alloy elements.
◇ The matrix microstructure can be changed from
Bearlite, Bainite to Martensite through adding alloy
elements such as Manganese, Nickel, Chromium
Molybdenum etc.
◇ The small amount of fine graphite in its matrix enhances the roll’s resistance to brittle crack,
thermal crack and its wearability.
◇ The small hardness gradient in roll’s working layer is suitable for usage in intermediate and
finishing stands for bar, wire and section mills.
◆ APPLICATION
Used in intermediate or finishing stands for bar, wire and section mills.
Symbol
Hardness
(HS)
Tensile strength
(MPa)
Bending strength
(MPa)
IC0 58~70
≥160
300~400IC1 60~72
IC2 62~72 ≥200
IC3 65~75
≥300 500~700
IC4 70~85
◆ SUMMARY
It is a kind of cast iron roll with fine intercrystalline
graphite evenly distributed throughout its working
layer.
It is shaped by Centrifugal Casting Machine, or by
gravity casting.

ALLOY CHILLED CAST IRON ROLLS
◆ CHARACTERISTICS
Alloy chilled cast iron roll has high hardness and
excellent wearability
Its microstructure is fine pearlite and carbide.
◆ APPLICATION
It is suitable for finish stands for small bar,
wire and section mills, as well as narrow strip mills.
Symbol
Hardness
(HS)
Tensile strength
(MPa)
Bending strength
(MPa)
CC1 60~70 ≥150 300~400
CC2 60~75 ≥160 300~400
CC3 65~80 ≥300 500~700
CC4 70~85 ≥300 500~700
◆ SUMMARY
It is a kind of cast iron roll with free graphite in
the matrix of its working layer.
It is shaped by Centrifugal Casting Machine, or
by gravity casting.

ALLOY NODULAR CAST IRON ROLLS
(Spherical Graphite)
◆ CHARACTERISTICS
◇ High hardness and excellent wearability.
◇ Microstructure of spherical graphite.
◇ Higher tensile strength than alloy indefinite chilled
roll.
◆ MECHANICAL PROPERTIES & APPLICATION
Symbol
Hardness
(HS)
Tensile
strength
(MPa)
Bending
strength
(MPa)
Application
SG1 40~55 ≥300 500~700
Rougher of bar, wire and section mills.
SG2 50~70 ≥300 500~700
SG3 55~70 ≥300 500~700
SG4 55~70 ≥300 500~700
SG5 60~70 ≥300 600~800 Finish stands of small section mills and
narrow hot strip mills.SG6 62~70 ≥320 600~800
SHD1 58~70 ≥300 600~800
Folding sheet mill
SGD2 58~70 ≥300 600~800
◆ SUMMARY
It is a kind of cast iron roll with free graphite in
the matrix of its working layer, and made by
gravity casting.

Rolls
PEARLITIC NODULAR CAST IRON ROLLS
◆ CHARACTERISTICS
◇ High strength
◇ Good thermal stability
◇ Resistance to impact
◇ Small hardness gradient of working layer
◆ APPLICATION
◇ Blooming mills
◇ Rougher and intermediate stands of bar, rod and section mills
Symbol
Hardness
(HS)
Tensile strength
(MPa)
Bending strength
(MPa)
SGP1 40~55
≥350 800~1000SGP2 50~65
SGP3 60~72
◆ SUMMARY
It is a kind of nodular cast iron roll with pearlitic
matrix in its microstructure, obtained by adding
alloy elements of Ni、Cr、Mo and using special
heat treatment.
gravity casting.

Rolls
BAINITIC NODULAR CAST IRON ROLLS
◆ CHARACTERISTICS
◇ High strength
— higher than Pearlitic Nodular Cast Iron Roll
◇ High toughness
— higher than Pearlitic Nodular Cast Iron Roll
◇ Good wearability
— better than Pearlitic Nodular Cast Iron Roll
◆ APPLICATION
◇ Finish stands of bar, rod, small section mills.
◇ Finish stands of narrow hot strip mills.
◇ Pre-finish stands of wire mills.
Symbol
Hardness
(HS)
Tensile strength
(MPa)
Bending strength
(MPa)
SGA1 55~70
≥400 600~800
SGA2 62~80
◆ SUMMARY
It is a kind of nodular cast iron roll with acicular
(Bainitie-Martensite) matrix in its microstructure,
obtained by adding alloy elements of Ni、Cr、Mo and
using special heat treatment.
gravity casting.

Rolls
NON CONTINUOUS CARBIDE ROLLS
◆ DESCRIPTION
It is necessary for rougher roll that a combination of some properties such as strength, hardness,
toughness and wearability at high temperature, as well as resistance of fire cracking and impact.
Bainitie / Martensite (acicular) matrix is helpful to improve integrative properties.
Carbide content in the matrix is less than 5%, which is satisfactory to the requirement of roughers.
◆ APPLICATION
◇ Rougher of bar, rod, wire mills.
Symbol
Hardness
(HS)
Tensile strength
(MPa)
Bending strength
(MPa)
NCC1 40~50
≥520 970~1380
NCC2 50~60
◆ SUMMARY
It is a kind of cast iron roll with acicular (Bainitie-
Martensite) matrix in its microstructure, and made
from high alloy materials of Ni, Mo with special
heat treatment.
It is shaped by Centrifugal Casting Machine, or
by gravity casting.

CAST IRON ROLLS WITH GROOVE
This kind of roll is developed with special technology of SINOEQUIPMENT.
◆ ADVANTAGE
◇ Small hardness difference between
barrel surface and groove surface.
◇ Good surface quality of rolled products.
◇ Long service life.
◆ APPLICATION
◇ Intermediate and large sections mills.
◇ Large bar mills.

RING & SHAFT
RING Chemical composition %
Code C Si Mn Cr Ni Mo
SGP 2.90/3.60 1.00/2.20 0.40/1.00 0.20/1.20 1.50/3.00 0.20/0.80
SGA 2.90/3.60 1.00/2.20 0.20/0.80 0.20/1.50 3.01/4.50 0.50/1.00
AD 1.50/2.10 0.30/0.80 0.60/1.30 0.80/3.50 0.50/2.50 0.20/0.80
GT 1.40/1.60 0.30/0.80 0.70/1.50 1.00/2.00 1.00/3.00 0.40/0.80
K-ME 2.50/3.00 0.50/0.70 0.80/1.20 10.00~15.00 ≥0.20 0.50/0.80
GS 1.60/2.20 1.20/2.00 0.50/1.50 1.00/3.00 1.00/3.00 0.40/0.80
RING Physical Property & Application
Code Berral hardness
(HS)
Tension strength
(Mpa)
Size
(mm)
Weight
(kg)
Application
SGP 55/65 450
ø400~1700 400~10000
FOR VERTICAL RING &
HORIZONTAL RING OF
UNIVERSAL MILL
FOR ROUGH-MIDDLE
RING OF BAR MILL
SGA 60/70 450
AD 50/60 600
GT 55/65 700
K-ME 60/70 700
GS 55/65 700

SHAFT Chemical composition %
CODE C Si Mn Cr Mo
42CrMo 0.38/0.45 0.17/0.37 0.50/0.80 0.90/1.20 0.15/0.30
SHAFT Physical Property & Application
CODE Tension strength
(Mpa)
Application
42CrMo ≥ 800
FOR VERTICAL RING & HORIZONTAL RING OF
UNIVERSAL MILL
FOR ROUGH-MIDDLE RING OF BAR MILL

2. FORGED STEEL ROLLS MAKING
Steel making
Electrode bar
Electroslag
remelting
Steel making
Ingot casting
Annealing
Peeling
Forging
Flaw detection
Rough machining
Heat treatment
Hardness testing
Finish machining
Grinding
Testing
Packing
Flaw detection

Melting and Forging
I. Melting
The alloy ingot for the blank of the forged steel rolls is usually melted by electric arc furnace.
Through the oxidization, restoration and adjustment to the ingredients of the steel liquid, slagging
reaction and slagging-off will reduce the content of harmful elements, thus to get qualified steel
liquid. The demoulded steel ingot can go to next step after its surface is finished and cleaned.
Pic.1 Electric Arc Furnace

II. Forging
The qualified steel ingot is pressed to the roll blank by the hydraulic forging machine after pre-
heating, heating and even heating. The purpose of forging and pressing process is: the forging and
pressing can reduce and compress the porosity, shrinkage and some pore; improve the
macroscopic segregation (pattern segregation, V shape segregation) in the original structure of the
steel ingot; shatter the gross liquation carbide and net carbide; crush and refine the gross grain. In
order to acquire the optimized feature of the roll, we strictly control the forging ratio , not less than 3
for work rolls while more than 2.5 for large size backup rolls.

Technical features:
1. Using ladle furnace and vacuum degas to control material composition and gas content to
guarantee anti-fatigue lifetime.
2. Advanced forging machine controls the forging ratio to guarantee density of materials and keep
material a high strength. We keep the forging ratio above 3 for work rolls/intermediate rolls and
above 2.5 for back-up rolls.
Electro Slag Remelting
Electro slag remelting (ESR) is a specialized steel-making process in which a cast ingot in the form
of an electrode is re-melted in a water-cooled copper mould. The melting is activated by resistive
heat generated in a conductive slag.
Charactersistics of ESR:
1. No macroscopic segregation and few microscopic segregation. Very few and subtle non-metal
inclusion; dispersed distribution.
2. Compact and homogeneous structure
3. High toughness and strength
4. Beneficial for improvement of anti-fatigue and heat impact ability of the roll

Hardening and Heat treatment
I. Work roll & Intermediate Rolls
Heat treatment is one of the most important processes during the roll manufacture. Heat
treat determinesthe quality of roll and further controls the quality of the strip/coils.
We use continuous double frequency induction process to maximize work rolls and intermediate
rolls performance by optimizing the critical parameters. We guarantee our hardness uniformity within
3 HSD and reach the hardness depth requested.
II. Back up Rolls
Back up rolls are widely used in both cold rolling mill and continuous hot strip mills. The heat
treatment for back up roll is different from the type of work roll. The back up rolls are produced by
the conventional furnace which is heated by gas and quenched by water spraying.

FORGING STEEL ROLLS
◆SUMMAY
It is made of high alloy steel melted
with electroslag remelting furnace
and finished with forging and molten salt heat treatment
◆ADVANTAGE
◇High mechanical strength
◇Good toughness
◇High wearability
◇Excellent resistance to fire crack
◆PRODUCTS & APPLICATION
PRODUCTS APPLICATION MILL TYPE
HSS series cold rolls Working rolls
Sendzimir Mill (ZR)
4-Hi, 6-Hi
Sub-HSS series cold rolls
Driving rolls
Sendzimir Mill (ZR)
6-Hi
Middle rolls
Cr8 series cold rolls Back up rolls
Sendzimir Mill (ZR)
4-Hi, 6-Hi
Roll steel series cold rolls Cold rolls 4-Hi, 6-Hi
Mold steel series cold rolls Hot rolls
Hot strip rolling mill for carton
steel, copper or aluminium

WORKING ROLL FOR COLD ROLLING MILL
SEEC supplies working roll for all kinds of cold rolling
such as 4-Hi,6-Hi,12-Hi,18-Hi, 20-Hi etc.
It is produced with electroslag remelting furnace
and finished with forging and molten salt teat
treatment.
◆MATERIAL & APPLICATION
GRADE MATERIAL APPLICATION
C
8CrMoV, 86CrMoV7, 85Cr2MoV, 9Cr2Mo,
9Cr2MoV, 9Cr2W , 9Cr3Mo, GCr15
Common working roll
B SKD11, DC53 High wearability
A M2, M7, M42, MC3, MC5, M2Co, DF3A
High wearability
Excellent resistance to fire crack
◆SURFACE HARDNESS
HARDNESS
(HSD)
Deepth
(subject to the dia of roll)
(mm)
APPLICATION
＜300 300-500 ＞500
＞95 6 7 8 Finishing mill, leveler
90-96 8 12 13 Finishing mill for strip or plate
75-90 10 14 15 Roughing mill for strip or plate

BACK UP ROLL & MIDDLE ROLL
SEEC supplies working roll for all kinds of cold rolling
such as 4-Hi,6-Hi,12-Hi,18-Hi, 20-Hi etc.
It is produced with electroslag remelting furnace
and finished with forging and molten salt teat
treatment.
◆MATERIAL & APPLICATION
MATERIAL
40Cr, 60CrMo, 9Cr2, 42CrMo, 70Cr3Mo, 9CrV, 55Cr, 9Cr2Mo, H12
◆SURFACE HARDNESS
HARDNESS
(HSD)
Deepth
(subject to the dia of roll)
(mm)
APPLICATION
65-75 40
Middle roll
Backup roll for 4 Hi mill
60-70 45
Middle roll
Backup roll for 6 Hi mill
55-65 50 Backup roll

Rolls
CAST IRON ROLL
Sorts Material
Material
Code
Chemical Composition(%) Hardness(HSD) Tensile
Strength
(N/mm2)
Applications
C Si Mn P S Cr Ni Mo V Cu Mg W Nb Barrel Neck
CLEAR CHILL
CAST IRON
CrMo
Chill Rolls
CC
2.90～
3.60
0.25～
0.80
0.20～
1.00
≤0.40 ≤0.08
0.20～
0.60
---
0.20～
0.60
--- --- --- --- --- 58～70
32～
48
≥150
Small
Section Mill;
Bar&Rod
Mill;
Sheet Mill
NiCrMo
Chill
Rolls(Ⅰ)
CCI
2.90～
3.60
0.25～
0.80
0.20～
1.00
≤0.40 ≤0.08
0.20～
0.60
0.50～
1.00
0.20～
0.60
--- --- --- --- --- 60～70
32～
50
NiCrMo
Chill
Rolls(Ⅱ)
CCⅡ
2.90～
3.60
0.25～
0.80
0.20～
1.00
≤0.40 ≤0.08
0.30～
1.20
1.01～
2.00
0.20～
0.60
--- --- --- --- --- 62～75
35～
52
NiCrMo
Chill
Centrifugal
Casting
Rolls(Ⅲ)
CCⅢ
2.90～
3.60
0.25～
0.80
0.20～
1.00
≤0.40 ≤0.08
0.50～
1.50
2.01～
3.00
0.20～
0.60
--- --- --- --- --- 65～80
32～
45
≥350
NiCrMo
Chill
Centrifugal
Casting
Rolls(Ⅳ)
CCⅣ
2.90～
3.60
0.25～
0.80
0.20～
1.00
≤0.40 ≤0.08
0.50～
1.70
3.01～
4.50
0.20～
0.60
--- --- --- --- --- 70～85
32～
45
INDEFINITE
CHILL CAST
IRON
CrMo
Indefinite
Chill Rolls
IC
2.90～
3.60
0.60～
1.2
0.40～
1.20
≤0.25 ≤0.08
0.60～
1.20
---
0.20～
0.60
--- --- --- --- --- 50～70
35～
55
≥160
Small
Section Mill;
Narrow

Rolls
NiCrMo
Indefinite
Chill
Rolls(Ⅰ)
ICⅠ
2.90～
3.60
0.60～
1.2
0.40～
1.20
≤0.25 ≤0.08
0.70～
1.20
0.50～
1.00
0.20～
0.60
--- --- --- --- --- 55～72
35～
55
Strip Mill
NiCrMo
Indefinite
Chill
Rolls(Ⅱ)
ICⅡ
2.90～
3.60
0.60～
1.2
0.40～
1.20
≤0.25 ≤0.08
0.70～
1.20
1.01～
2.00
0.20～
0.60
--- --- --- --- --- 55～72
35～
55
NiCrMo
Indefinite
Chill
Centrifugal
Casting
Rolls(Ⅲ)
ICⅢ
2.90～
3.60
0.60～
1.2
0.40～
1.20
≤0.25 ≤0.05
0.70～
1.20
2.01～
3.00
0.20～
1.00
--- --- --- --- --- 65～78
32～
45
≥350
Hi-NiCrMo
Indefinite
Chill
Centrifugal
Casting
Rolls(Ⅳ)
ICⅣ
2.90～
3.60
0.60～
1.50
0.40～
1.20
≤0.10 ≤0.05
1.00～
2.00
3.01～
4.80
0.20～
1.00
--- --- --- --- --- 70～83
32～
45
Medium
Plate Mill;
Sheet MillHi-NiCrMo
Indefinite
Chill
Centrifugal
Casting
Rolls(Ⅴ)
ICⅤ
2.90～
3.60
0.60～
1.50
0.40～
1.20
≤0.10 ≤0.05
1.00～
2.00
3.01～
4.80
0.20～
2.00
0.20～
2.00
--- ---
0.20～
2.00
0.20～
2.00
77～85
32～
45
SPHEROIDAL
GRAPHITE
CAST IRON
(Nodular Iron)
CrMo S.G.
Chill Rolls
SGⅠ
2.90～
3.60
0.80～
2.50
0.40～
1.20
≤0.25 ≤0.03
0.20～
0.60
---
0.20～
0.60
--- --- ≥0.04 40～55
32～
50
≥320 Section Mill

Rolls
CrMoS.G.
Indefinite
ChillRolls
SGⅡ
2.90～
3.60
0.80～
2.50
0.40～
1.20
≤0.25 ≤0.03
0.20～
0.60
---
0.20～
0.60
--- --- ≥0.04 50～70
35～
55
Bar&Rod
Mill;
Section Mill;
Narrow
Strip Mill
CrMoCu
S.G.
Indefinite
ChillRolls
SGⅢ
2.90～
3.60
0.80～
2.50
0.40～
1.20
≤0.25 ≤0.03
0.20～
0.60
---
0.20～
0.60
---
0.40～
1.00
≥0.04 55～70
35～
55
NiCrMo
S.G.
Indefinite
ChillRolls
(Ⅰ)
SGⅣ
2.90～
3.60
0.80～
2.50
0.40～
1.20
≤0.25 ≤0.03
0.20～
0.60
0.50～
1.00
0.20～
0.80
--- --- ≥0.04 55～70
35～
55
NiCrMo
S.G.
Indefinite
ChillRolls
(Ⅱ)
SGⅤ
2.90～
3.60
0.80～
2.50
0.40～
1.20
≤0.20 ≤0.03
0.30～
1.2
1.01～
2.00
0.20～
0.80
--- --- ≥0.04 60～70
35～
55
Pearlitic
S.G.Rolls
(Ⅰ)
SGPⅠ
2.90～
3.60
1.40～
2.20
0.40～
1.20
≤0.15 ≤0.03
0.10～
0.60
1.50～
2.00
0.20～
0.80
--- --- ≥0.04 45～55
35～
55
≥450
Bar&Rod
Mill;
Section Mill;
Narrow
Strip Mill
Pearlitic
S.G.Rolls
(Ⅱ)
SGPⅡ
2.90～
3.60
1.20～
2.00
0.40～
1.20
≤0.15 ≤0.03
0.20～
1.00
2.01～
2.50
0.20～
0.80
--- --- ≥0.04 55～65
35～
55
Pearlitic
S.G.Rolls
(Ⅲ)
SGPⅢ
2.90～
3.60
1.20～
2.00
0.40～
1.20
≤0.15 ≤0.03
0.20～
1.20
2.51～
3.00
0.20～
0.80
--- --- ≥0.04 62～72
35～
55

Rolls
S.G.
Acicular
Centrifugal
Casting
Rolls(Ⅰ)
SGAⅠ
2.90～
3.60
1.20～
2.20
0.20～
0.80
≤0.10 ≤0.03
0.20～
1.00
3.01～
3.50
0.50～
1.00
--- --- ≥0.04 55～78
32～
45
≥350
S.G.
Acicular
Centrifugal
Casting
Rolls(Ⅱ)
SGAⅡ
2.90～
3.60
1.00～
2.00
0.20～
0.80
≤0.10 ≤0.03
0.30～
1.50
3.51～
4.50
0.50～
1.00
--- --- ≥0.04 60～80
32～
45
High
Chromium
Cast Iron
Hi-Cr
Centrifugal
Casting
Rolls(Ⅰ)
HCrⅠ
2.30～
3.30
0.30～
1.00
0.50～
1.20
≤0.10 ≤0.05
12.00～
15.00
0.70～
1.70
0.70～
1.50
0.00～
0.60
--- --- 60～75
32～
45
≥350
Sheet Mill;
Plate Mill
Hi-Cr
Centrifugal
Casting
Rolls(Ⅱ)
HCrⅡ
2.30～
3.30
0.30～
1.00
0.50～
1.20
≤0.10 ≤0.05
15.01～
18.00
0.70～
1.70
0.70～
1.50
0.00～
0.60
--- --- 65～80
32～
45
Hi-Cr
Centrifugal
Casting
Rolls(Ⅲ)
HCrⅢ
2.30～
3.30
0.30～
1.00
0.50～
1.20
≤0.10 ≤0.05
18.01～
22.00
0.70～
1.70
1.51～
3.00
0.00～
0.60
--- --- 75～90
32～
45

Rolls
CAST STEEL ROLL
Material
Material
Code
Chemical Composition(%) Hardness(HSD) Applications
C Si Mn Cr Ni Mo V Nb W Co P S Barrel Neck
Alloy
Steel
Rolls
AS40
0.35～
0.45
0.20～
0.60
0.60～
1.20
2.00～
3.50
0.00～
0.80
0.30～
0.70
0.05～
0.15
--- ---
≤0.036 ≤0.030
45～55
55～65
≤45
Back-up Rolls or Rou-ghig Rollsof Strip
Mill;
Roughing Rolls of Plate Mill;
Back-up Rolls of Cold-Strip Steel Rolling
Mill
AS50
0.45～
0.55
0.20～
0.60
0.60～
1.20
1.00～
3.00
0.30～
1.00
0.30～
0.70
0.05～
0.15
60～70 ≤45
AS60
0.55～
0.65
0.20～
0.45
0.90～
1.20
0.80～
1.20
0.20～
0.45
35～45
40～50
≤45
Roughing Stand of Section or Bar&Rod
Mill;
Roughing Rolls of Plate Mill;
Back-up Rolls or Vertical Rolls of Strip
Mill
AS60I
0.55～
0.65
0.20～
0.60
0.50～
1.00
0.80～
1.20
0.20～
1.50
0.20～
0.60
35～45 ≤45
AS65
0.60～
0.70
0.20～
0.60
0.70～
1.20
0.80～
1.20
0.20～
0.45
0.06～
0.10
35～45 ≤45
AS65I
0.60～
0.70
0.20～
0.60
0.50～
0.80
0.80～
1.20
0.20～
0.50
0.20～
0.45
35～45 ≤45
AS70
0.65～
0.75
0.20～
0.45
0.90～
1.20
1.00～
3.00
0.30～
1.00
0.30～
0.70
32～42 ≤42
Roughing Stand of Section or Bar&Rod
Mill

Rolls
AS70I
0.65～
0.75
0.20～
0.45
1.40～
1.80
35～45 ≤45
AS70Ⅱ
0.65～
0.75
0.20～
0.45
1.40～
1.80
0.20～
0.45
35～45 ≤45
AS75
0.70～
0.80
0.20～
0.45
0.60～
0.90
0.75～
1.00
0.20～
0.45
35～45
40～50
≤45
Roughing Stand of Section Mill or Plate
Mill
AS75I
0.70～
0.80
0.20～
0.70
0.70～
1.10
0.80～
1.50
≥0.20
0.20～
0.60
35～45
40～50
≤45
Adamite
Rolls
AD140
1.30～
1.50
0.30～
0.60
0.70～
1.40
0.80～
1.60
0.20～
0.60
38～48
45～55
≤48
Roughig or Intermediate Stand of Section
or Bar&Rod Mill;
AD140I
1.30～
1.50
0.30～
0.60
0.70～
1.10
0.80～
1.20
0.50～
1.20
0.20～
0.60
35～45
40～50
≤45
AD160
1.50～
1.70
0.30～
0.60
0.70～
1.10
0.80～
1.20
0.20～
0.60
40～50 ≤50
AD160I
1.50～
1.70
0.30～
0.60
0.80～
1.30
0.80～
2.00
≥0.20
0.20～
0.60
--- --- ---
40～50
50～60
≤50 Roughing Stand of Section or Bar&Rod
Mill;
Mill
AD180
1.70～
1.90
0.30～
0.80
0.60～
1.10
0.80～
1.50
0.50～
2.00
0.20～
0.60
--- --- ---
45～55
50～60
≤50

Rolls
AD190
1.80～
2.00
0.30～
0.80
0.60～
1.20
1.50～
3.50
1.00～
2.00
0.20～
0.60
--- --- --- 55～65 ≤50
AD200
1.90～
2.10
0.30～
0.80
0.80～
1.20
0.60～
2.00
0.50～
2.50
0.20～
0.80
--- --- ---
50～60
55～65
≤50
Graphite
Steel
Rolls
GS140
1.30～
1.50
1.30～
1.60
0.50～
1.00
0.40～
1.00
---
0.20～
0.50
--- --- --- 36～46 ≤46
Section or Bar&Rod Mill;
Roughing Stand or Vertical Rolls of Strip
Mill
GS150
1.40～
1.60
1.00～
1.70
0.60～
1.00
0.60～
1.00
0.20～
1.00
0.20～
0.50
--- --- --- 40～50 ≤50
GS160
1.50～
1.70
0.80～
1.50
0.60～
1.00
0.50～
1.50
0.20～
1.00
0.20～
0.80
--- --- --- 45～55 ≤50
GS190
1.80～
2.00
0.80～
1.50
0.60～
1.00
0.50～
2.00
0.60～
2.20
0.20～
0.80
--- --- ---
50～60
55～65
≤50
High
Chrome
Steel
Rolls
HCrS
1.00～
1.80
0.40～
1.00
0.50～
1.00
8.00～
15.00
0.50～
1.50
1.50～
4.50
--- --- ---
≤0.030 ≤0.025
70～85
35～
45
Roughing Stand or Vertical Rolls of Strip
Mill
High
Speed
Steel
Rolls
HSS
1.50～
2.20
0.30～
1.00
0.40～
1.20
3.00～
8.00
0.00～
1.50
2.00～
8.00
2.00～
9.00
≤5.0
0.00～
8.00
≤8.0 75～95
30～
45
Finishing Stand of Strip Mill and
Bar&Rod Mill

Rolls
Semi-
High
Speed
Steel
Rolls
S·HSS
0.60～
1.20
0.80～
1.50
0.50～
1.00
3.00～
9.00
0.20～
1.20
2.00～
5.00
0.40～
3.00
---
0.00～
3.00
75～85
80～98
30～
45
Work Rolls for Strip Mill;
Work Rolls or Intermediate Stand of
Cold-Strip Steel Rolling Mill

Rolls
FORGED STEEL ROLL
Material Steel Grade
Chemical coposition % Application
C Cr Mo V Ni Mn Co W
Cr1
GCr15 0.95-1.05 1.3-1.65 ≤0.4 Work roll of Cold mill
Straightenning roll
Pinch roll9CrV 0.85-0.95 1.4-1.7 0.1-0.25 ≤0.25
42CrMo 0.38-0.45 0.9-1.2
0.15-
0.25 Work roll & Backup roll for Hot rolling mill
60CrMo 0.55-0.65 0.5-0.8 0.3-0.4
60CrMnMo 0.55-0.65 0.8-1.2 0.3-0.4 0.7-1.0
60CrMoV 0.55-0.65 0.9-1.2 0.3-0.4 0.15-0.35
Straightenning roll
Pinch roll
Cr2
9Cr2Mo 0.85-0.95 1.7-2.1 0.2-0.4 Work roll, Middle roll, Backup roll for Cold
Rolling mill86CrMoV7 0.82-0.9 1.8-2.2 0.2-0.4 0.1-0.2
9Cr2MoV 0.85-0.95 1.7-2.1 0.2-0.3 0.1-0.2
Cr3
9Cr3Mo 0.85-0.95 2.5-3.5 0.2-0.4 Work roll, Middle roll, Backup roll for Cold
Rolling mill
(high quenching, deep hard layer)
MC3A 0.8-0.88 2.8-3.2 0.4-0.6 0.05-0.12 0.6-0.8
MC3B 0.82-0.9 2.7-3.1 0.1-0.3 0.05-0.12 0.2-0.4
70Cr3Mo 0.6-0.75 2.0-3.5 0.25-0.6 Work roll, Middle roll, Backup roll for Hot
Rolling mill
(high quenching, deep hard layer)70Cr3NiMo 0.6-0.8 2.0-3.0 0.25-0.6 0.4-0.6
Cr5
MC5 0.82-0.9 5-5.4 0.2-0.4 0.1-0.2 0.3-0.5 Work roll for Cold Rolling mill
(high quenching, deep hard layer)MC5A 0.77-0.84 5-5.4 0.3-0.5 0.1-0.2 0.3-0.5
Cr12
Cr12MoV 1.45-1.7 11-12.5 0.4-0.6 0.15-0.3 Work roll, Middle roll for Multi-roll Rolling
millCr12Mo1V1 1.4-1.6 11-13 0.7-1.2 ≤1.1 ≤1.0
Cr12MoVCo 1.4-1.6 11-13 0.8-1.2 0.75-0.95 0.3-0.5
W steel
W6Mo5Cr4V2 0.8-0.9 3.8-4.0 4.5-5.5 1.75-2.25 5.5-6.75 Work roll for Multi-roll Rolling mill
W12Cr4V5Co5 1.5-1.6 3.75-5.0 ≤1.0 4.5-5.25 4.75-5.25 11.75-13

Rolls

Rolls
BUILDING OUR FUTURE TOGETHER
BEIJING SINO STEEL ENGINEERING & EQUIPMENT CO., LTD.

Cast Roll forged roll

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