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GB/T 3077 35SiMn vs BS 970 (Part 1) 170H41

Close Alternative — 72.3% match based on chemical composition and mechanical property overlap.

GB/T 3077 35SiMn (GB/T 3077:2015) and BS 970 (Part 1) 170H41 (BS 970 (Part 1):1991) are both steel grades. Both fall under the Alloy Steel category. GB/T 3077 35SiMn is typically used for hot-rolled or forged structural alloy steel bars, while BS 970 (Part 1) 170H41 is commonly used for through hardening boron steel (section three). GB/T 3077 35SiMn is defined under Guobiao Standards (GB/T), originating from China, while BS 970 (Part 1) 170H41 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, GB/T 3077 35SiMn vs BS 970 (Part 1) 170H41 is a 72.3% 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 72.3%.

Frequently Compared With GB/T 3077 35SiMn:
IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 7) 10Cr36Mo10H IS 1570 (Part 7) 10Mo6H IS 4367 07Cr4Mo6 IS 1570 (Part 4) 07Cr4Mo6 NF A35-565 100C6 UNI 11234 100Cr6 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 10Cr20Mo6 IS 4367 10Cr9Mo10 EN 10028-2 10CrMo9-10
Match Breakdown
CHEMISTRY MATCH
72.3%
MECHANICAL MATCH
No shared data
OVERALL
72.3%
Specifications
Property GB/T 3077 35SiMn BS 970 (Part 1) 170H41
Standard GB/T 3077:2015 BS 970 (Part 1):1991
Category Alloy Steel Alloy Steel
C (%) 0.32-0.40 0.37-0.44
Si (%) 1.10-1.40 Not specified
Mn (%) 1.10-1.40 0.80-1.10
P (%) <=0.030 Not specified
S (%) <=0.030 Not specified
Cu (%) <=0.30 Not specified
B (%) Not specified 0.0005-0.005
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 35SiMn BS 970 (Part 1) 170H41
Tensile Strength >=885 MPa Not specified
Yield Strength >=735 MPa Not specified
Elongation >=15% Not specified
Hardness <=229 HB Not specified
Condition Quenched and tempered, test sample 25 mm; hardness is for bars delivered annealed or high temperature tempered Not specified
Typical Applications
GB/T 3077 35SiMn
Hot-rolled or forged structural alloy steel bars
BS 970 (Part 1) 170H41
Through hardening boron steel (section three)
Key Differences
Can GB/T 3077 35SiMn Be Substituted With BS 970 (Part 1) 170H41?
GB/T 3077 35SiMn and BS 970 (Part 1) 170H41 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 35SiMn
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BS 970 (Part 1) 170H41
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Frequently Asked Questions
What is the difference between GB/T 3077 35SiMn and BS 970 (Part 1) 170H41?
GB/T 3077 35SiMn specifies Si, P, S, Cu which are not specified for BS 970 (Part 1) 170H41. BS 970 (Part 1) 170H41 specifies B which is not specified for GB/T 3077 35SiMn.
Can GB/T 3077 35SiMn be substituted with BS 970 (Part 1) 170H41?
GB/T 3077 35SiMn and BS 970 (Part 1) 170H41 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.