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GB/T 3077 20CrMn vs BS 970 (Part 1) 590A15

Close Alternative — 83.1% match based on chemical composition and mechanical property overlap.

GB/T 3077 20CrMn (GB/T 3077:2015) and BS 970 (Part 1) 590A15 (BS 970 (Part 1):1983) are both steel grades. Both fall under the Alloy Steel category. GB/T 3077 20CrMn is typically used for hot-rolled or forged structural alloy steel bars, while BS 970 (Part 1) 590A15 is commonly used for case hardening steel for mechanical and allied engineering purposes (table 11 mechanical properties).. GB/T 3077 20CrMn is defined under Guobiao Standards (GB/T), originating from China, while BS 970 (Part 1) 590A15 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, GB/T 3077 20CrMn vs BS 970 (Part 1) 590A15 is a 83.1% 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 83.1%.

Frequently Compared With GB/T 3077 20CrMn:
IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 7) 10Mo6H IS 4367 07Cr4Mo6 NF A35-565 100C6 UNI 11234 100Cr6 IS 1570 (Part 4) 10Cr20Mo6 EN 10028-2 10CrMo9-10 IS 1570 (Part 4) 10Mo6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 7) 10Cr36Mo10H
Match Breakdown
CHEMISTRY MATCH
83.1%
MECHANICAL MATCH
No shared data
OVERALL
83.1%
Specifications
Property GB/T 3077 20CrMn BS 970 (Part 1) 590A15
Standard GB/T 3077:2015 BS 970 (Part 1):1983
Category Alloy Steel Alloy Steel
C (%) 0.17-0.23 0.13-0.18
Si (%) 0.17-0.37 Not specified
Mn (%) 0.90-1.20 0.90-1.20
Cr (%) 0.90-1.20 0.90-1.20
P (%) <=0.030 <=0.035
S (%) <=0.030 <=0.040
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 20CrMn BS 970 (Part 1) 590A15
Tensile Strength >=930 MPa Not specified
Yield Strength >=735 MPa Not specified
Elongation >=10% Not specified
Hardness <=187 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 20CrMn
Hot-rolled or forged structural alloy steel bars
BS 970 (Part 1) 590A15
Case hardening steel for mechanical and allied engineering purposes (Table 11 mechanical properties).
Key Differences
Can GB/T 3077 20CrMn Be Substituted With BS 970 (Part 1) 590A15?
GB/T 3077 20CrMn and BS 970 (Part 1) 590A15 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 20CrMn
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BS 970 (Part 1) 590A15
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Frequently Asked Questions
What is the difference between GB/T 3077 20CrMn and BS 970 (Part 1) 590A15?
GB/T 3077 20CrMn specifies Si, Cu which are not specified for BS 970 (Part 1) 590A15.
Can GB/T 3077 20CrMn be substituted with BS 970 (Part 1) 590A15?
GB/T 3077 20CrMn and BS 970 (Part 1) 590A15 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.