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GB/T 3077 20SiMn2MoV vs IS 1570 (Part 6) T55Si7Mo3

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

GB/T 3077 20SiMn2MoV (GB/T 3077:2015) and IS 1570 (Part 6) T55Si7Mo3 (IS 1570 (Part 6):1996) are both steel grades. GB/T 3077 20SiMn2MoV is classified under Alloy Steel, while IS 1570 (Part 6) T55Si7Mo3 is classified under Tool & Die Steels — a different category, which is worth noting alongside the chemistry match below. GB/T 3077 20SiMn2MoV is defined under Guobiao Standards (GB/T), originating from China, while IS 1570 (Part 6) T55Si7Mo3 is defined under Bureau of Indian Standards (IS), originating from India.

As per chemical composition, GB/T 3077 20SiMn2MoV vs IS 1570 (Part 6) T55Si7Mo3 is a 69.9% 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 GB/T 3077 20SiMn2MoV:
IS 1570 (Part 7) 10Mo6H 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 IS 1570 (Part 4) 10Cr20Mo6 IS 4367 10Cr9Mo10 IS 1570 (Part 4) 10Mo6 UNI 11234 100Cr6 IS 1570 (Part 7) 10Cr36Mo10H
Match Breakdown
CHEMISTRY MATCH
69.9%
MECHANICAL MATCH
No shared data
OVERALL
65%
Specifications
Property GB/T 3077 20SiMn2MoV IS 1570 (Part 6) T55Si7Mo3
Standard GB/T 3077:2015 IS 1570 (Part 6):1996
Category Alloy Steel Tool & Die Steels
C (%) 0.17-0.23 0.50-0.60
Si (%) 0.90-1.20 1.50-2.00
Mn (%) 2.20-2.60 0.80-1.00
Mo (%) 0.30-0.40 0.25-0.40
V (%) 0.05-0.12 0.12-0.20 (optional)
P (%) <=0.030 <=0.035
S (%) <=0.030 <=0.035
Cu (%) <=0.30 Not specified
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property GB/T 3077 20SiMn2MoV IS 1570 (Part 6) T55Si7Mo3
Tensile Strength >=1380 MPa Not specified
Elongation >=10% Not specified
Hardness <=269 HB Not specified
Condition Quenched and tempered, test sample Specimen (size not stated); hardness is for bars delivered annealed or high temperature tempered Not specified
Typical Applications
GB/T 3077 20SiMn2MoV
Hot-rolled or forged structural alloy steel bars
IS 1570 (Part 6) T55Si7Mo3
Not documented
Key Differences
Can GB/T 3077 20SiMn2MoV Be Substituted With IS 1570 (Part 6) T55Si7Mo3?
GB/T 3077 20SiMn2MoV and IS 1570 (Part 6) T55Si7Mo3 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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GB/T 3077 20SiMn2MoV
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IS 1570 (Part 6) T55Si7Mo3
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Frequently Asked Questions
What is the difference between GB/T 3077 20SiMn2MoV and IS 1570 (Part 6) T55Si7Mo3?
Different category: GB/T 3077 20SiMn2MoV is Alloy Steel, IS 1570 (Part 6) T55Si7Mo3 is Tool & Die Steels. GB/T 3077 20SiMn2MoV specifies Cu which is not specified for IS 1570 (Part 6) T55Si7Mo3.
Can GB/T 3077 20SiMn2MoV be substituted with IS 1570 (Part 6) T55Si7Mo3?
GB/T 3077 20SiMn2MoV and IS 1570 (Part 6) T55Si7Mo3 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.