SPA-C - JIS G 3125-2021

Grade	SPA-C
Corresponding Standard	JIS G 3125-2021 Superior Atmospheric Corrosion Resisting Structural Steel
Classification	Alloy Steel

SPA-C Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu
Minimum Value	-	0.2	-	0.07	-	0.3	-	0.25
Maximum Value	0.12	0.75	0.6	0.15	0.035	1.25	0.65	0.55

• Alloying elements not listed in this table may be added as necessary.
• By agreement between the supplier and purchaser, the Mn content may be reduced to below 1.0%.

SPA-C Mechanical Properties

thickness t mm	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %
/	≥450	≥315	≥26

Approximate Comparison Table Atmospheric Corrosion Resisting Structural Steel

China	Japan	United States
GB	JIS	ASTM
Q310GNH GB/T 4171-2008	SPA-C JIS G3125-2004	Type4 A606-04

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