ASTM A240/A240M S31651 vs IS 1570 (Part 7) 12Cr12Ni2Mo
Minimal Match — 31.9% match
based on chemical composition and mechanical property overlap.
ASTM A240/A240M S31651 (ASTM A240/A240M:2025) and IS 1570 (Part 7) 12Cr12Ni2Mo (IS 1570 (Part 7):1992) are both steel grades.
Both fall under the Stainless Steel category.
ASTM A240/A240M S31651 is typically used for pressure vessels and general applications (plate, sheet and strip), while IS 1570 (Part 7) 12Cr12Ni2Mo is commonly used for boilers, pressure vessels, steam turbines, steam and water piping and other power plant equipment working at elevated temperature.
ASTM A240/A240M S31651 is defined under ASTM International, originating from United States, while IS 1570 (Part 7) 12Cr12Ni2Mo is defined under Bureau of Indian Standards (IS), originating from India.
As per chemical composition, ASTM A240/A240M S31651 vs IS 1570 (Part 7) 12Cr12Ni2Mo is a 47.8% match.
As per mechanical properties, the match is 0%.
Combined, this makes them a minimal match overall at 31.9%.
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 S31651
IS 1570 (Part 7) 12Cr12Ni2Mo
Tensile Strength
>=550 MPa
930-1130 MPa
Yield Strength
>=240 MPa
>=785 MPa (0.2 % proof stress)
Elongation
>=35%
>=14%
Hardness
<=217 HB
Not specified
Condition
Plate, sheet and strip; yield by 0.2 percent offset
Bars, forgings, Q+T, thickness up to 150 (first row of Table 3)
Typical Applications
ASTM A240/A240M S31651
Pressure vessels and general applications (plate, sheet and strip)
IS 1570 (Part 7) 12Cr12Ni2Mo
Boilers, pressure vessels, steam turbines, steam and water piping and other power plant equipment working at elevated temperature
Key Differences
IS 1570 (Part 7) 12Cr12Ni2Mo specifies V which is not specified for ASTM A240/A240M S31651.
Can ASTM A240/A240M S31651 Be Substituted With IS 1570 (Part 7) 12Cr12Ni2Mo?
ASTM A240/A240M S31651 and IS 1570 (Part 7) 12Cr12Ni2Mo 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.
What is the difference between ASTM A240/A240M S31651 and IS 1570 (Part 7) 12Cr12Ni2Mo?
IS 1570 (Part 7) 12Cr12Ni2Mo specifies V which is not specified for ASTM A240/A240M S31651.
Can ASTM A240/A240M S31651 be substituted with IS 1570 (Part 7) 12Cr12Ni2Mo?
ASTM A240/A240M S31651 and IS 1570 (Part 7) 12Cr12Ni2Mo 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.