70Si2CrA - GB 3525-1983

Grade	70Si2CrA
Corresponding Standard	GB 3525-1983 Cold-Rolled Spring and Steel Strips
Classification	Spring Steel
Properties	High Elasticity

70Si2CrA Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni
Minimum Value	0.65	1.4	0.4	-	-	0.2	-
Maximum Value	0.75	1.7	0.6	0.03	0.03	0.4	0.03

70Si2CrA Mechanical Properties

condition	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Elongation or Extension Rate δ %
Spring Strip Steel; Cold Rolled; 0.1<t≤	Cold hard	785~1177
Spring Strip; 0.1<t≤	Annealing	≤834	≥8

70Si2CrA Corresponding Standards(Same grade name, different standards)

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