71Si 7 1.5029 - DIN 17222-1979

Grade	71Si 7
Germany W-Nr.	1.5029
Corresponding Standard	DIN 17222-1979 Cold Rolled Steel Strips for Springs Technical Condition of Delivery
Classification	Spring Steel

71Si 7 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S
Minimum Value	0.68	1.5	0.6	-	-
Maximum Value	0.75	1.8	0.8	0.035	0.035

71Si 7 Mechanical Properties

thickness t mm	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Elongation or Extension Rate δ %	Hardness HBW
t≤3*	Cold Rolled + Soft Annealing (G)	≤800	≥9	HV** ≤240
t≤3****	Cold Rolled + Quenching + Tempering (H+A)	*** 1500~2200		445~650
t≤3	Quenching			≥680

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