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IS 1570 (Part 6) T55Si7Mo3 vs IS 1570 (Part 7) 15Mo6H

Related Material — 65% match based on chemical composition and mechanical property overlap.

IS 1570 (Part 6) T55Si7Mo3 (IS 1570 (Part 6):1996) and IS 1570 (Part 7) 15Mo6H (IS 1570 (Part 7):1992) are both steel grades. IS 1570 (Part 6) T55Si7Mo3 is classified under Tool & Die Steels, while IS 1570 (Part 7) 15Mo6H is classified under Alloy Steel — a different category, which is worth noting alongside the chemistry match below. IS 1570 (Part 6) T55Si7Mo3 is defined under Bureau of Indian Standards (IS), originating from India, while IS 1570 (Part 7) 15Mo6H is defined under Bureau of Indian Standards (IS), originating from India.

As per chemical composition, IS 1570 (Part 6) T55Si7Mo3 vs IS 1570 (Part 7) 15Mo6H is a 71.8% 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 65%.

Frequently Compared With IS 1570 (Part 6) T55Si7Mo3:
GOST 5950 4H5MFS1 EN ISO 683-17 100Cr6 EN ISO 4957 1.2316 GOST 5950 4H5MFS DIN EN ISO 4957 1.2344 IS 1570 (Part 6) 133T3 GB/T 1299 3Cr2W8V IS 1570 (Part 6) 118T3 GOST 5950 3H2W8F DIN EN ISO 4957 1.2379 IS 1570 (Part 6) 103T3 GB/T 1299 4Cr5MoSiV
Match Breakdown
CHEMISTRY MATCH
71.8%
MECHANICAL MATCH
No shared data
OVERALL
65%
Specifications
Property IS 1570 (Part 6) T55Si7Mo3 IS 1570 (Part 7) 15Mo6H
Standard IS 1570 (Part 6):1996 IS 1570 (Part 7):1992
Category Tool & Die Steels Alloy Steel
C (%) 0.50-0.60 0.10-0.20
Si (%) 1.50-2.00 0.10-0.50
Mn (%) 0.80-1.00 0.30-0.80
Mo (%) 0.25-0.40 0.44-0.65
V (%) 0.12-0.20 (optional) Not specified
P (%) <=0.035 <=0.045
S (%) <=0.035 <=0.045
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property IS 1570 (Part 6) T55Si7Mo3 IS 1570 (Part 7) 15Mo6H
Tensile Strength Not specified >=380 MPa
Yield Strength Not specified >=205 MPa (0.2 % proof stress)
Elongation Not specified >=22%
Condition Not specified Tubes, N+T, thickness - (first row of Table 3)
Typical Applications
IS 1570 (Part 6) T55Si7Mo3
Not documented
IS 1570 (Part 7) 15Mo6H
Boilers, pressure vessels, steam turbines, steam and water piping and other power plant equipment working at elevated temperature
Key Differences
Can IS 1570 (Part 6) T55Si7Mo3 Be Substituted With IS 1570 (Part 7) 15Mo6H?
IS 1570 (Part 6) T55Si7Mo3 and IS 1570 (Part 7) 15Mo6H 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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IS 1570 (Part 6) T55Si7Mo3
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IS 1570 (Part 7) 15Mo6H
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Frequently Asked Questions
What is the difference between IS 1570 (Part 6) T55Si7Mo3 and IS 1570 (Part 7) 15Mo6H?
Different category: IS 1570 (Part 6) T55Si7Mo3 is Tool & Die Steels, IS 1570 (Part 7) 15Mo6H is Alloy Steel. IS 1570 (Part 6) T55Si7Mo3 specifies V which is not specified for IS 1570 (Part 7) 15Mo6H.
Can IS 1570 (Part 6) T55Si7Mo3 be substituted with IS 1570 (Part 7) 15Mo6H?
IS 1570 (Part 6) T55Si7Mo3 and IS 1570 (Part 7) 15Mo6H 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.