70 - GB 3522-1983

Grade	70
Corresponding Standard	GB 3522-1983 Cold-Rolled Quality Carbon Structural Steel Strips
Classification	Carbon Steel

70 Mechanical Properties

	Tensile Strength σ_b Mpa	Elongation or Extension Rate δ %
Cold-worked steel strip (Y)	735~1127
Annealed steel strip (T)	441~735	≥10

1 Approximate Comparison Table Spring Steel

China		United States		International Organization for Standardization	France	Russia	Sweden	United Kingdom
GB	ISC	AISI	UNS	ISO	NF EN/NF	GOST	SS₁₄	BS EN/BS
70	U20702	1070	G10700	Type DC	XC70	70	1778	070A72

2 Approximate Comparison Table High-Quality Carbon Structural Steel

3 Approximate Comparison Table High-Quality Carbon Structural Steel

4 Approximate Comparison Table Spring Steel

China		United States	International Organization for Standardization	European Standard
GB	ISC	ASTM/AISI	ISO	EN	Numerical Grade
70 (GB/T 1222-2016)	U20702	1070 (ASTM A29/A29M:2005)	DC (ISO 8458.3:1992)	C70D (EN 10016-2:1994)	1.0615

5 Approximate Comparison Table Spring Steel 1

70 Corresponding Standards(Same grade name, different standards)

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