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BS 970 (Part 1) 325S31 vs IS 1570 (Part 7) 12Cr12MoH

Minimal Match — 35% match based on chemical composition and mechanical property overlap.

BS 970 (Part 1) 325S31 (BS 970 (Part 1):1991) and IS 1570 (Part 7) 12Cr12MoH (IS 1570 (Part 7):1992) are both steel grades. Both fall under the Stainless Steel category. BS 970 (Part 1) 325S31 is typically used for austenitic stainless and heat resisting steel (section five), 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. BS 970 (Part 1) 325S31 is defined under British Standards (BS), originating from United Kingdom, while IS 1570 (Part 7) 12Cr12MoH is defined under Bureau of Indian Standards (IS), originating from India.

As per chemical composition, BS 970 (Part 1) 325S31 vs IS 1570 (Part 7) 12Cr12MoH is a 59.6% match. As per mechanical properties, the match is 0%. Combined, this makes them a minimal match overall at 35%.

Frequently Compared With BS 970 (Part 1) 325S31:
IS 1570 (Part 7) 12Cr12Ni2Mo GB/T 3280 06Cr19Ni10 EN 10088-1 1.4006 ASTM A959 .- GOST 5632 06Kh23N28 GOST 5632 08X18H10 IS 1570 (Part 7) 11Cr17Ni13W3TiH EN 10088-1 1.4301 EN 10088-1 1.4401 EN 10088-1 1.4845 IS 1570 (Part 7) 12Cr12MoVH IS 1570 (Part 7) 12Cr13H
Match Breakdown
CHEMISTRY MATCH
59.6%
MECHANICAL MATCH
0%
OVERALL
35%
Specifications
Property BS 970 (Part 1) 325S31 IS 1570 (Part 7) 12Cr12MoH
Standard BS 970 (Part 1):1991 IS 1570 (Part 7):1992
Category Stainless Steel Stainless Steel
C (%) <=0.12 0.08-0.16
Si (%) <=1.0 <=0.60
Mn (%) <=2.0 0.40-1.00
P (%) <=0.045 <=0.040
S (%) 0.15-0.35 <=0.035
Cr (%) 17.0-19.0 11.5-13.00
Ni (%) 8.0-11.0 <=1.0
Mo (%) Not specified 0.40-0.80
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property BS 970 (Part 1) 325S31 IS 1570 (Part 7) 12Cr12MoH
Condition Softened, 1000-1100 deg C Bars, forgings, Q+T, thickness up to 75 (first row of Table 3)
Tensile Strength 510 MPa min 680-880 MPa
Yield Strength 200 MPa min (0.2% proof) >=490 MPa (0.2 % proof stress)
Elongation 35 % min >=20%
Hardness 183 HB max Not specified
Typical Applications
BS 970 (Part 1) 325S31
Austenitic stainless and heat resisting steel (section five)
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
Can BS 970 (Part 1) 325S31 Be Substituted With IS 1570 (Part 7) 12Cr12MoH?
BS 970 (Part 1) 325S31 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.
On M-EX Right Now
BS 970 (Part 1) 325S31
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IS 1570 (Part 7) 12Cr12MoH
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Frequently Asked Questions
What is the difference between BS 970 (Part 1) 325S31 and IS 1570 (Part 7) 12Cr12MoH?
IS 1570 (Part 7) 12Cr12MoH specifies Mo which is not specified for BS 970 (Part 1) 325S31.
Can BS 970 (Part 1) 325S31 be substituted with IS 1570 (Part 7) 12Cr12MoH?
BS 970 (Part 1) 325S31 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.