3J240 3J21 - GB /T 37797-2019 - H2ABC

中文版

Grade	3J240
Old Grade
Corresponding Standard	GB /T 37797-2019 Precision Alloys—Designation
Classification	Alloy Steel
Properties	High Elasticity Corrosion Resistance
Density	8.4 g/cm³

3J240 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Mo	Co	More
Minimum Value	0.07	-	1.7	-	-	19	14	6.5	39	Fe:余量
Maximum Value	0.12	0.6	2.3	0.01	0.01	21	16	7.5	41	Fe:余量

3J240 Mechanical Properties

thickness or diameter d mm	Mark	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Elongation or Extension Rate δ %
Strip; 0.1<d≤2.5	Performance Group A	Cold Rolling	1176~1470	≥5
Strip; 0.1<d≤2.5	Performance Group B	Cold Rolling	1470~1764	≥3
Wire; 0.1<d≤5	Performance Group A	Cold Drawing	1274~1568	-
Wire; 0.1<d≤5	Performance Group B	Cold Drawing	1568~1862	-
Bar; d=12~22	-	Cold Drawing	1176~1568	≥5

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