Post Stock Login Register

ASTM A240/A240M S20161 vs ASTM A959 S21800

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

ASTM A240/A240M S20161 (ASTM A240/A240M:2025) and ASTM A959 S21800 (ASTM A959:2011) are both steel grades. Both fall under the Stainless Steel category. ASTM A240/A240M S20161 is typically used for pressure vessels and general applications (plate, sheet and strip), while ASTM A959 S21800 is commonly used for wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1). ASTM A240/A240M S20161 is defined under ASTM International, originating from United States, while ASTM A959 S21800 is defined under ASTM International, originating from United States.

As per chemical composition, ASTM A240/A240M S20161 vs ASTM A959 S21800 is a 74.3% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a related material overall at 69.9%.

Frequently Compared With ASTM A240/A240M S20161:
GB/T 3280 06Cr19Ni10 GOST 5632 06Kh23N28 GOST 5632 08X18H10 EN 10088-1 1.4006 EN 10088-1 1.4301 EN 10088-1 1.4401 EN 10088-1 1.4845 IS 1570 (Part 7) 11Cr17Ni13W3TiH IS 1570 (Part 7) 12Cr12MoH IS 1570 (Part 7) 12Cr12MoVH IS 1570 (Part 7) 12Cr12Ni2Mo ASTM A959 201
Match Breakdown
CHEMISTRY MATCH
74.3%
MECHANICAL MATCH
No shared data
OVERALL
69.9%
Specifications
Property ASTM A240/A240M S20161 ASTM A959 S21800
Standard ASTM A240/A240M:2025 ASTM A959:2011
Category Stainless Steel Stainless Steel
C (%) <=0.15 <=0.10
Mn (%) 4.00-6.00 7.0-9.0
P (%) <=0.040 <=0.060
S (%) <=0.040 <=0.030
Si (%) 3.00-4.00 3.5-4.5
Cr (%) 15.0-18.0 16.0-18.0
Ni (%) 4.0-6.0 8.0-9.0
N (%) 0.08-0.20 0.08-0.18
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 S20161 ASTM A959 S21800
Tensile Strength >=860 MPa Not specified
Yield Strength >=345 MPa Not specified
Elongation >=40% Not specified
Hardness <=255 HB Not specified
Condition Plate, sheet and strip; yield by 0.2 percent offset Not specified
Typical Applications
ASTM A240/A240M S20161
Pressure vessels and general applications (plate, sheet and strip)
ASTM A959 S21800
Wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1)
Can ASTM A240/A240M S20161 Be Substituted With ASTM A959 S21800?
ASTM A240/A240M S20161 and ASTM A959 S21800 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.
On M-EX Right Now
ASTM A240/A240M S20161
0 active listings and RFQs →
ASTM A959 S21800
0 active listings and RFQs →
Frequently Asked Questions
What is the difference between ASTM A240/A240M S20161 and ASTM A959 S21800?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can ASTM A240/A240M S20161 be substituted with ASTM A959 S21800?
ASTM A240/A240M S20161 and ASTM A959 S21800 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.