Minimal Match — 35% match
based on chemical composition and mechanical property overlap.
JIS G4305 SUS321 (JIS G4305:2012) and IS 1570 (Part 7) 12Cr12MoH (IS 1570 (Part 7):1992) are both steel grades.
Both fall under the Stainless Steel category.
JIS G4305 SUS321 is typically used for cold-rolled stainless steel plates, sheet and strip, while IS 1570 (Part 7) 12Cr12MoH is commonly used for boilers, pressure vessels, steam turbines, steam and water piping and other power plant equipment working at elevated temperature.
JIS G4305 SUS321 is defined under Japanese Industrial Standards (JIS), originating from Japan, while IS 1570 (Part 7) 12Cr12MoH is defined under Bureau of Indian Standards (IS), originating from India.
As per chemical composition, JIS G4305 SUS321 vs IS 1570 (Part 7) 12Cr12MoH is a 59.9% match.
As per mechanical properties, the match is 0%.
Combined, this makes them a minimal match overall at 35%.
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property
JIS G4305 SUS321
IS 1570 (Part 7) 12Cr12MoH
Tensile Strength
>=520 MPa
680-880 MPa
Yield Strength
>=205 MPa
>=490 MPa (0.2 % proof stress)
Elongation
>=40%
>=20%
Hardness
<=187 HB
Not specified
Condition
Solution heat treated plate and strip; 0.2 percent proof strength applies only when specified by the purchaser
Bars, forgings, Q+T, thickness up to 75 (first row of Table 3)
Typical Applications
JIS G4305 SUS321
Cold-rolled stainless steel plates, sheet and strip
IS 1570 (Part 7) 12Cr12MoH
Boilers, pressure vessels, steam turbines, steam and water piping and other power plant equipment working at elevated temperature
Key Differences
IS 1570 (Part 7) 12Cr12MoH specifies Mo which is not specified for JIS G4305 SUS321.
Can JIS G4305 SUS321 Be Substituted With IS 1570 (Part 7) 12Cr12MoH?
JIS G4305 SUS321 and IS 1570 (Part 7) 12Cr12MoH 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 JIS G4305 SUS321 and IS 1570 (Part 7) 12Cr12MoH?
IS 1570 (Part 7) 12Cr12MoH specifies Mo which is not specified for JIS G4305 SUS321.
Can JIS G4305 SUS321 be substituted with IS 1570 (Part 7) 12Cr12MoH?
JIS G4305 SUS321 and IS 1570 (Part 7) 12Cr12MoH 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.