Steel equivalents / Austenitic stainless steel 304 (304 / 1.4301 / SUS304)

1.4307 (X2CrNi18-9)

EUApproximate match

CEN · EN 10088-1:2014

The 304/304L family groups the world's most widely used chromium-nickel (18/8) austenitic stainless grades, valued for their good balance of corrosion resistance, formability, weldability and cost. Found in appliances, food service, food processing, architecture and piping in low-chloride environments. The low-carbon 304L variant improves intergranular corrosion resistance after welding, at the cost of a slightly lower minimum mechanical strength.

Equivalents by yield strength proximity

Grade	Region	Standard	Re (MPa)	Rm (MPa)	Delta
1.4307 (X2CrNi18-9)	EU	EN 10088-1:2014	175	500–700	reference
STS304L	KR	KS D 3698:2008	175	≥480	0%
304L (UNS S30403)	US	ASTM A240 / A276	170	≥485	-3%
SUS304L	JP	JIS G4303:2012	170	≥480	-3%
Neighboring grades — different strength
304 (UNS S30400)	US	ASTM A240 / A276	205	≥515	+17%
SUS304	JP	JIS G4303:2012	205	≥520	+17%
STS304	KR	KS D 3698:2008	205	≥520	+17%
1.4301 (X5CrNi18-10)	EU	EN 10088-1:2014	210	520–720	+20%

Chemical composition (wt%)

Grade	C	Mn	Si	P	S	Cr	Ni	Mo	N
1.4307 (X2CrNi18-9)	≤0.03	≤2	≤1	≤0.045	≤0.03	17.5–19.5	8–10.5	—	≤0.1
STS304L	≤0.03	≤2	≤1	≤0.045	≤0.03	18–20	9–13	—	—
304L (UNS S30403)	≤0.03	≤2	≤0.75	≤0.045	≤0.03	18–20	8–12	—	≤0.1
SUS304L	≤0.03	≤2	≤1	≤0.045	≤0.03	18–20	9–13	—	—
304 (UNS S30400)	≤0.08	≤2	≤0.75	≤0.045	≤0.03	18–20	8–10.5	—	≤0.1
SUS304	≤0.08	≤2	≤1	≤0.045	≤0.03	18–20	8–10.5	—	—
STS304	≤0.08	≤2	≤1	≤0.045	≤0.03	18–20	8–10.5	—	—
1.4301 (X5CrNi18-10)	≤0.07	≤2	≤1	≤0.045	≤0.015	17.5–19.5	8–10.5	—	≤0.11

Note: Low-carbon variant of 1.4301, with better intergranular corrosion resistance after welding; lower minimum yield strength (Rp0.2 ≥175 MPa vs. ≥210 MPa for 1.4301).

Values compiled from public sources for guidance only — always verify against the official standard before use in design or fabrication.