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1. Bolt Size
Tension
Stength
Yield
Strength
Enlogation
in. ksi ksi % Surface
Core
Rockwell
1/4 to 3/4 74 57 18 / B80-100
over 3/4 to 1-1/2 60 36 18 / B70-100
1/4 to 1 120 92 14 54 C25-34
over 1 to 1-1/2 105 81 14 50 C19-30
GR.8 1/4 to 1-1/2 150 130 12 58.6 C33-39
SAE J429 Mechanical Properties and Head Marking
ASTM
SAE J429
GR.2
GR.5
/
Standard
for Bolt
Grade
Hardness
Head Marking
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Shanghai Jian & Mei Industry and Trade Co.,Ltd Tel:0086-21 33328690
E-mial: info@jm-industry.com Fax:021-68413263