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ASTM A240/A240M S81921 vs ASTM A240/A240M S31200

Related Material — 69.9% match based on chemical composition and mechanical property overlap.

ASTM A240/A240M S81921 (ASTM A240/A240M:2025) and ASTM A240/A240M S31200 (ASTM A240/A240M:2025) are both steel grades. Both fall under the Stainless Steel category. ASTM A240/A240M S81921 is typically used for pressure vessels and general applications (plate, sheet and strip), while ASTM A240/A240M S31200 is commonly used for pressure vessels and general applications (plate, sheet and strip). ASTM A240/A240M S81921 is defined under ASTM International, originating from United States, while ASTM A240/A240M S31200 is defined under ASTM International, originating from United States.

As per chemical composition, ASTM A240/A240M S81921 vs ASTM A240/A240M S31200 is a 75.8% match. As per mechanical properties, the match is 75%. Combined, this makes them a related material overall at 69.9%.

Frequently Compared With ASTM A240/A240M S81921:
GOST 5632 08X18H10 EN 10088-1 1.4006 EN 10088-1 1.4845 ASTM A959 .- GB/T 3280 06Cr19Ni10 GOST 5632 06Kh23N28 EN 10088-1 1.4301 EN 10088-1 1.4401 IS 1570 (Part 7) 11Cr17Ni13W3TiH IS 1570 (Part 7) 12Cr12MoH IS 1570 (Part 7) 12Cr12MoVH IS 1570 (Part 7) 12Cr12Ni2Mo
Match Breakdown
CHEMISTRY MATCH
75.8%
MECHANICAL MATCH
75%
OVERALL
69.9%
Specifications
Property ASTM A240/A240M S81921 ASTM A240/A240M S31200
Standard ASTM A240/A240M:2025 ASTM A240/A240M:2025
Category Stainless Steel Stainless Steel
C (%) <=0.030 <=0.030
Mn (%) 2.00-4.00 <=2.00
P (%) <=0.040 <=0.045
S (%) <=0.030 <=0.030
Si (%) <=1.00 <=1.00
Cr (%) 19.0-22.0 24.0-26.0
Ni (%) 2.0-4.0 5.5-6.5
Mo (%) 1.00-2.00 1.20-2.00
N (%) 0.14-0.20 0.14-0.20
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property ASTM A240/A240M S81921 ASTM A240/A240M S31200
Tensile Strength >=620 MPa >=690 MPa
Yield Strength >=450 MPa >=450 MPa
Elongation >=25% >=25%
Hardness <=293 HB <=293 HB
Condition Plate, sheet and strip; yield by 0.2 percent offset Plate, sheet and strip; yield by 0.2 percent offset
Typical Applications
ASTM A240/A240M S81921
Pressure vessels and general applications (plate, sheet and strip)
ASTM A240/A240M S31200
Pressure vessels and general applications (plate, sheet and strip)
Can ASTM A240/A240M S81921 Be Substituted With ASTM A240/A240M S31200?
ASTM A240/A240M S81921 and ASTM A240/A240M S31200 share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.
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ASTM A240/A240M S81921
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ASTM A240/A240M S31200
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Frequently Asked Questions
What is the difference between ASTM A240/A240M S81921 and ASTM A240/A240M S31200?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can ASTM A240/A240M S81921 be substituted with ASTM A240/A240M S31200?
ASTM A240/A240M S81921 and ASTM A240/A240M S31200 share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.