1. astm a307 mechanical properties and head marking
TRANSCRIPT
Tension Stength
Yield Strength
Enlogation Length
ksi ksi % in. Brinell Rockwell B
＜3*D 121-241HRB 69-100HRB
≥3*D 241max 100max
＜3*D 121-212 69-95
≥3*D 212max 95max
ASTM A307
Head MarkingHardness
60-100 -- 18GR.B (heavy hex bolt)
60min --
ASTM A307 Mechanical Properties and Head Marking
Standard for Bolt
Grade
18GR.A (hex head bolt)
sales15
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