SUS 440A SUS 440A-CP SUS 440A-CS - JIS G 4305-2021

Grade	SUS 440A
Other Names
Corresponding Standard	JIS G 4305-2021 Cold-Rolled Stainless Steel Plate, Sheet and Strip
Classification	Martensitic Stainless Steel
Properties	Corrosion Resistance

SUS 440A Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Mo
Minimum Value	0.6	-	-	-	-	16	-	-
Maximum Value	0.75	1	1	0.04	0.03	18	0.6	0.75

①Where necessary, –CP may be attached after the above symbol of grade to indicate that the product is a plate. Example SUS 310L-CP
②Where necessary, –CS may be attached after the above symbol of grade to indicate that the product is a strip. Example SUS304-CS

SUS 440A Mechanical Properties

Heat Treatment or Condition	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Hardness HBW
Annealing	≥590	≥245	≥15	≤255

1 Approximate Comparison Table Martensitic Stainless Steel

China		Taiwan, China	Japan	South Korea	United States
GB	ISC	CNS	JIS	KS	ASTM	UNS
68Cr17 (7Cr17)	S44070	440A	SUS 440A	STS 440A	440A	S44002

2 Approximate Comparison Table Martensitic Stainless Steel

China	Japan	United States	International Organization for Standardization		European Standard
ISC	JIS	UNS	ISO	Numerical Grade	Numerical Grade
S44070	SUS440A	S44002	X68Cr17	4040-440-02-X	(1.4040)

SUS440A Corresponding Standards(Same grade name, different standards)

1	JIS G 4303-2005
	SUS 440A
2	JIS G 4304-2005
	SUS 440A SUS 440A-HP SUS 440A-HS
3	JIS G 4305-2021
	SUS 440A SUS 440A-CP SUS 440A-CS

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