J1199 Class 9.8 - SAE J1199-1978(R2001)

Grade	J1199 Class 9.8
Corresponding Standard	SAE J1199-1978(R2001) Mechanical and Material Requirements for Metric Externally Threaded Steel Fasteners
Classification	Carbon Steel

J1199 Class 9.8 Chemical Element Composition Content (%)

	Component	C ^②	P	S ^①
中碳钢(适用于所有尺寸)	Minimum Value	0.28	-	-
中碳钢(适用于所有尺寸)	Maximum Value	0.55	0.048	0.058

	Component	C	Mn	P	S	B
低碳马氏体钢(≤M20)	Minimum Value	0.15	0.74	-	-	0.0005
低碳马氏体钢(≤M20)	Maximum Value	0.27	1.46	0.038	0.048	0.003

	Component	C	Mn	P	S	B
中碳硼钢(≤M24)	Minimum Value	0.25	0.74	-	-	0.0005
中碳硼钢(≤M24)	Maximum Value	0.4	-	0.048	0.058	0.003

J1199 Class 9.8 Mechanical Properties

	Tensile Strength σ_b Mpa	Hardness HBW
M1.6~M16		HRC(product) 27~36
M1.6~M16 (Full size)	≥900

Note: The data is for reference only! If you have any questions, please fill out "I want to correct it"!