80 U20802 - GB /T 1222-2025

80 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu
Minimum Value	0.77	0.17	0.5	-	-	-	-	-
Maximum Value	0.85	0.37	0.8	0.025	0.02	0.25	0.35	0.2

80 Mechanical Properties

Heat Treatment or Condition	Tensile Strength σ_b Mpa	Specified Plastic Yield Strength Rp_0.2 Mpa	Elongation or Extension Rate δ %	Reduction of Area ψ %
Quenched in oil at 820±20°C and tempered at 480±50°C	≥1080	ReL ≥930	≥6	≥30

Approximate Comparison Table High-Quality Carbon Structural Steel

China	Japan	United States	International Organization for Standardization	Germany		France	Russia	United Kingdom
GB	JIS	ASTM/AISI	ISO	DIN EN/DIN	W-Nr.	NF EN/NF	GOST	BS EN/BS
80	SWRH82A SWRH82B	1080	Type SC Type DC	C80D	1.0622	C80D XC80	80	C80D 060A83

80 Corresponding Standards(Same grade name, different standards)

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