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SAE 30304 vs ASTM A959 XM-21

Strong Match — 91.4% match based on chemical composition and mechanical property overlap.

SAE 30304 (SAE J405) and ASTM A959 XM-21 (ASTM A959:2011) 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 ASTM A959 XM-21 is commonly used for wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1). SAE 30304 is defined under SAE International, originating from United States, while ASTM A959 XM-21 is defined under ASTM International, originating from United States.

As per chemical composition, SAE 30304 vs ASTM A959 XM-21 is a 91.4% 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 91.4%.

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) 12Cr12Ni2Mo IS 1570 (Part 7) 11Cr17Ni13W3TiH IS 1570 (Part 7) 12Cr12MoH ASTM A959 .-
Match Breakdown
CHEMISTRY MATCH
91.4%
MECHANICAL MATCH
No shared data
OVERALL
91.4%
Specifications
Property SAE 30304 ASTM A959 XM-21
Standard SAE J405 ASTM A959:2011
Category Stainless Steel Stainless Steel
C (%) 0.08 max <=0.08
Mn (%) 2.00 max <=2.00
Si (%) 0.75 max <=1.00
Cr (%) 18.00-20.00 18.0-20.0
Ni (%) 8.00-10.50 8.0-10.0
P (%) 0.045 max <=0.045
S (%) 0.030 max <=0.030
N (%) Not specified 0.16-0.30
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 ASTM A959 XM-21
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.
ASTM A959 XM-21
Wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1)
Key Differences
Can SAE 30304 Be Substituted With ASTM A959 XM-21?
SAE 30304 and ASTM A959 XM-21 overlap closely enough on chemistry and mechanical properties that ASTM A959 XM-21 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)
ASTM A959 XM-21
No active listings currently.
On M-EX Right Now
SAE 30304
2 active listings and RFQs →
ASTM A959 XM-21
0 active listings and RFQs →
Frequently Asked Questions
What is the difference between SAE 30304 and ASTM A959 XM-21?
ASTM A959 XM-21 specifies N which is not specified for SAE 30304.
Can SAE 30304 be substituted with ASTM A959 XM-21?
SAE 30304 and ASTM A959 XM-21 overlap closely enough on chemistry and mechanical properties that ASTM A959 XM-21 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.