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SAE 30304 vs BS 970 (Part 3) 304S31

Strong Match — 90.6% match based on chemical composition and mechanical property overlap.

SAE 30304 (SAE J405) and BS 970 (Part 3) 304S31 (BS 970 (Part 3):1991) are both steel grades. Both fall under the Stainless Steel category. SAE 30304 is typically used for used for chemical equipment, food processing machinery, architectural panels, fasteners, pressure vessels, and heat exchangers., while BS 970 (Part 3) 304S31 is commonly used for bright cold finished bars (cold drawn, turned or precision ground) for general engineering purposes, in straight lengths; austenitic stainless and heat resisting steel (table 18). SAE 30304 is defined under SAE International, originating from United States, while BS 970 (Part 3) 304S31 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, SAE 30304 vs BS 970 (Part 3) 304S31 is a 90.6% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a strong match overall at 90.6%.

Frequently Compared With SAE 30304:
EN 10088-1 1.4845 EN 10088-1 1.4006 GB/T 3280 06Cr19Ni10 GOST 5632 06Kh23N28 EN 10088-1 1.4401 GOST 5632 12Kh13 GOST 5632 08X18H10 EN 10088-1 1.4301 IS 1570 (Part 7) 12Cr12MoH IS 1570 (Part 7) 12Cr12Ni2Mo IS 1570 (Part 7) 11Cr17Ni13W3TiH ASTM A959 .-
Match Breakdown
CHEMISTRY MATCH
90.6%
MECHANICAL MATCH
No shared data
OVERALL
90.6%
Specifications
Property SAE 30304 BS 970 (Part 3) 304S31
Standard SAE J405 BS 970 (Part 3):1991
Category Stainless Steel Stainless Steel
C (%) 0.08 max <=0.07
Mn (%) 2.00 max <=2.0
Si (%) 0.75 max <=1.0
Cr (%) 18.00-20.00 17.0-19.0
Ni (%) 8.00-10.50 8.0-11.0
P (%) 0.045 max <=0.045
S (%) 0.030 max <=0.030
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property SAE 30304 BS 970 (Part 3) 304S31
Tensile Strength 515-690 MPa Not specified
Yield Strength 205 MPa min Not specified
Elongation 40% min Not specified
Hardness 201 HB max Not specified
Typical Applications
SAE 30304
Used for chemical equipment, food processing machinery, architectural panels, fasteners, pressure vessels, and heat exchangers.
BS 970 (Part 3) 304S31
Bright cold finished bars (cold drawn, turned or precision ground) for general engineering purposes, in straight lengths; austenitic stainless and heat resisting steel (Table 18)
Can SAE 30304 Be Substituted With BS 970 (Part 3) 304S31?
SAE 30304 and BS 970 (Part 3) 304S31 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 3) 304S31 is often considered as a substitute for SAE 30304 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.
Forms & Sizes Available on M-EX
SAE 30304
Sheet → (2 listings)
Thickness: 6–6 mm (0.24–0.24 in)
Width: 1250–1250 mm (49.21–49.21 in)
Length: 2500–3000 mm (98.43–118.11 in)
BS 970 (Part 3) 304S31
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On M-EX Right Now
SAE 30304
2 active listings and RFQs →
BS 970 (Part 3) 304S31
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Frequently Asked Questions
What is the difference between SAE 30304 and BS 970 (Part 3) 304S31?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can SAE 30304 be substituted with BS 970 (Part 3) 304S31?
SAE 30304 and BS 970 (Part 3) 304S31 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 3) 304S31 is often considered as a substitute for SAE 30304 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.