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ASTM A387/A387M Grade 91 vs IS 1570 (Part 7) 10Cr36Mo10H

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

ASTM A387/A387M Grade 91 (ASTM A387/A387M:2011) and IS 1570 (Part 7) 10Cr36Mo10H (IS 1570 (Part 7):1992) are both steel grades. Both fall under the Alloy Steel category. ASTM A387/A387M Grade 91 is typically used for welded boilers and pressure vessels for elevated temperature service, while IS 1570 (Part 7) 10Cr36Mo10H is commonly used for boilers, pressure vessels, steam turbines, steam and water piping and other power plant equipment working at elevated temperature. ASTM A387/A387M Grade 91 is defined under ASTM International, originating from United States, while IS 1570 (Part 7) 10Cr36Mo10H is defined under Bureau of Indian Standards (IS), originating from India.

As per chemical composition, ASTM A387/A387M Grade 91 vs IS 1570 (Part 7) 10Cr36Mo10H is a 53.6% match. As per mechanical properties, the match is 0%. Combined, this makes them a minimal match overall at 35%.

Frequently Compared With ASTM A387/A387M Grade 91:
IS 1570 (Part 4) 10Mo6 UNI 11234 100Cr6 IS 1570 (Part 4) 10Cr20Mo6 IS 4367 10Cr9Mo10 IS 4367 07Cr4Mo6 IS 1570 (Part 4) 07Cr4Mo6 NF A35-565 100C6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 105Cr5 EN 10028-2 12CrMoV12-10 EN 10028-2 10CrMo9-10
Match Breakdown
CHEMISTRY MATCH
53.6%
MECHANICAL MATCH
0%
OVERALL
35%
Specifications
Property ASTM A387/A387M Grade 91 IS 1570 (Part 7) 10Cr36Mo10H
Standard ASTM A387/A387M:2011 IS 1570 (Part 7):1992
Category Alloy Steel Alloy Steel
C (%) 0.08-0.12 <=0.15
Mn (%) 0.30-0.60 0.30-0.60
P (%) <=0.020 <=0.040
S (%) <=0.010 <=0.030
Si (%) 0.20-0.50 0.25-1.0
Cr (%) 8.00-9.50 8.00-10.00
Mo (%) 0.85-1.05 0.90-1.10
Ni (%) <=0.40 Not specified
V (%) 0.18-0.25 Not specified
Nb (%) 0.06-0.10 Not specified
N (%) 0.030-0.070 Not specified
Al (%) <=0.02 Not specified
Ti (%) <=0.01 Not specified
Zr (%) <=0.01 Not specified
Al (metallic) (%) Not specified <=0.02
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property ASTM A387/A387M Grade 91 IS 1570 (Part 7) 10Cr36Mo10H
Tensile Strength 585-760 MPa 410-560 MPa
Yield Strength >=415 MPa >=135 MPa (0.2 % proof stress)
Elongation >=18% >=20%
Condition Class 2 plates, no thickness ranges printed; elongation in 50 mm gauge length Pipes, A, thickness - (first row of Table 3)
Typical Applications
ASTM A387/A387M Grade 91
Welded boilers and pressure vessels for elevated temperature service
IS 1570 (Part 7) 10Cr36Mo10H
Boilers, pressure vessels, steam turbines, steam and water piping and other power plant equipment working at elevated temperature
Key Differences
Can ASTM A387/A387M Grade 91 Be Substituted With IS 1570 (Part 7) 10Cr36Mo10H?
ASTM A387/A387M Grade 91 and IS 1570 (Part 7) 10Cr36Mo10H 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 A387/A387M Grade 91
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IS 1570 (Part 7) 10Cr36Mo10H
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Frequently Asked Questions
What is the difference between ASTM A387/A387M Grade 91 and IS 1570 (Part 7) 10Cr36Mo10H?
ASTM A387/A387M Grade 91 specifies Ni, V, Nb, N which are not specified for IS 1570 (Part 7) 10Cr36Mo10H. IS 1570 (Part 7) 10Cr36Mo10H specifies Al (metallic) which is not specified for ASTM A387/A387M Grade 91.
Can ASTM A387/A387M Grade 91 be substituted with IS 1570 (Part 7) 10Cr36Mo10H?
ASTM A387/A387M Grade 91 and IS 1570 (Part 7) 10Cr36Mo10H 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.