Which is better SUS304 or SS304?

SUS304SS304. Are they the same? Which one is better for your application? This article compares SUS304 vs SS304 in terms of standards, chemical composition, applications, and purchasing considerations - especially useful for global procurement teams.

 

What is SUS304 And SS304 stainless steel?

SS304		American grade defined under ASTM A240, widely used internationally
SUS304		Japanese grade defined under JIS G4305, equivalent to AISI 304

What is SUS304 steel equivalent to?

	SUS304
	SS304
	EN 1.4301 / X5CrNi18-10
	06Cr19Ni10 (GB/T)

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When buying stainless steel sheet, coil, or pipe from Japanese Or Chinese Mills, you may receive material marked SUS304, while Western mills or stockists use SS304 or 1.4301.
Always verify by Mill Certificate / Test Report (MTC) rather than just grade name.

Chemical Composition: SUS304 vs SS304

	SUS304 / SS304 Typical (%)
	18.0 – 20.0
	8.0 – 10.5
	<= 0.08
	<= 2.0
	<= 1.0
	<= 0.045
	<= 0.030

SUS304 vs SS304:Mechanical Properties

	SUS304 / SS304 Typical Values
	520 – 750 MPa
Yield Strength (0.2%)	>= 205 MPa
	>= 40%
	<= 90
	~7.93 g/cm³

 

🔹 Is SUS304 food grade?

Yes. SUS304 is food-safe and used in kitchen equipment, sinks, and food processing lines in Japan and Asia.

🔹 Is SUS304 magnetic?

In the annealed state, SUS304 is non-magnetic. However, light magnetism may appear after cold working.

🔹 Is there a price difference between SUS304 and SS304?

, .

 

SUS304 stainless steel 

Welded and seamless pipes (ASTM A312 / JIS G3459)

Surface finish: 2B, BA, HL, No.4, mirror (8K)

 

📩 Need to Source SUS304 or SS304 Sheet, Pipe or Coil?

SUS304 and SS304 stainless steel materials, compliant to ASTM, JIS, and EN standards. Whether your application is food-grade, decorative, or structural - we deliver the right spec, right finish, and right price.

📧 for a fast quotation or technical datasheet.