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GB/T 3077 20MnVB vs BS 970 (Part 1) 170H20

Close Alternative — 75.9% match based on chemical composition and mechanical property overlap.

GB/T 3077 20MnVB (GB/T 3077:2015) and BS 970 (Part 1) 170H20 (BS 970 (Part 1):1991) are both steel grades. Both fall under the Alloy Steel category. GB/T 3077 20MnVB is typically used for hot-rolled or forged structural alloy steel bars, while BS 970 (Part 1) 170H20 is commonly used for through hardening boron steel (section three). GB/T 3077 20MnVB is defined under Guobiao Standards (GB/T), originating from China, while BS 970 (Part 1) 170H20 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, GB/T 3077 20MnVB vs BS 970 (Part 1) 170H20 is a 75.9% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a close alternative overall at 75.9%.

Frequently Compared With GB/T 3077 20MnVB:
IS 1570 (Part 4) 103Cr6 NF A35-565 100C6 UNI 11234 100Cr6 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 4) 10Cr20Mo6 EN 10028-2 10CrMo9-10 IS 1570 (Part 7) 10Mo6H IS 4367 07Cr4Mo6 IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 7) 10Cr36Mo10H IS 4367 10Cr9Mo10
Match Breakdown
CHEMISTRY MATCH
75.9%
MECHANICAL MATCH
No shared data
OVERALL
75.9%
Specifications
Property GB/T 3077 20MnVB BS 970 (Part 1) 170H20
Standard GB/T 3077:2015 BS 970 (Part 1):1991
Category Alloy Steel Alloy Steel
C (%) 0.17-0.23 0.17-0.23
Si (%) 0.17-0.37 Not specified
Mn (%) 1.20-1.60 0.80-1.10
B (%) 0.0008-0.0035 0.0005-0.005
V (%) 0.07-0.12 Not specified
P (%) <=0.030 Not specified
S (%) <=0.030 Not specified
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 20MnVB BS 970 (Part 1) 170H20
Tensile Strength >=1080 MPa Not specified
Yield Strength >=885 MPa Not specified
Elongation >=10% Not specified
Hardness <=207 HB Not specified
Condition Quenched and tempered, test sample 15 mm; hardness is for bars delivered annealed or high temperature tempered Not specified
Typical Applications
GB/T 3077 20MnVB
Hot-rolled or forged structural alloy steel bars
BS 970 (Part 1) 170H20
Through hardening boron steel (section three)
Key Differences
Can GB/T 3077 20MnVB Be Substituted With BS 970 (Part 1) 170H20?
GB/T 3077 20MnVB and BS 970 (Part 1) 170H20 are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.
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GB/T 3077 20MnVB
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BS 970 (Part 1) 170H20
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Frequently Asked Questions
What is the difference between GB/T 3077 20MnVB and BS 970 (Part 1) 170H20?
GB/T 3077 20MnVB specifies Si, V, P, S which are not specified for BS 970 (Part 1) 170H20.
Can GB/T 3077 20MnVB be substituted with BS 970 (Part 1) 170H20?
GB/T 3077 20MnVB and BS 970 (Part 1) 170H20 are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.