Grade J1199 Class 4.8
Corresponding Standard SAE J1199-1978(R2001)
Mechanical and Material Requirements for Metric Externally Threaded Steel Fasteners
Classification Carbon Steel
J1199 Class 4.8 Chemical Element Composition Content (%)
Component C P S
Minimum Value - - -
Maximum Value 0.55 0.048 0.058
J1199 Class 4.8 Mechanical Properties
Tensile Strength
σb
Mpa
Hardness
HBW
M1.6~M16 HRB(product)
71~87
M1.6~M16 (Full size) ≥420

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