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GB/T 3077 17CrNiMo6 vs BS 970 (Part 1) 817M40

Related Material — 68.5% match based on chemical composition and mechanical property overlap.

GB/T 3077 17CrNiMo6 (GB/T 3077-2015) and BS 970 (Part 1) 817M40 (BS 970 (Part 1):1983) are both steel grades. Both fall under the Alloy Steel category. GB/T 3077 17CrNiMo6 is typically used for used for automotive gears, gearboxes, shafts, pinions, industrial reducers, and heavy machinery components., while BS 970 (Part 1) 817M40 is commonly used for through hardening steel for mechanical and allied engineering purposes; supplied in the hardened and tempered conditions of table 6.. GB/T 3077 17CrNiMo6 is defined under Guobiao Standards (GB/T), originating from China, while BS 970 (Part 1) 817M40 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, GB/T 3077 17CrNiMo6 vs BS 970 (Part 1) 817M40 is a 68.5% 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 68.5%.

Frequently Compared With GB/T 3077 17CrNiMo6:
NF A35-565 100C6 GB/T 3077 12Cr2Ni4A UNI 11234 100Cr6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 7) 10Cr36Mo10H IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 4) 10Mo6 IS 4367 07Cr4Mo6 IS 1570 (Part 4) 10Cr20Mo6 IS 4367 10Cr9Mo10
Match Breakdown
CHEMISTRY MATCH
68.5%
MECHANICAL MATCH
No shared data
OVERALL
68.5%
Specifications
Property GB/T 3077 17CrNiMo6 BS 970 (Part 1) 817M40
Standard GB/T 3077-2015 BS 970 (Part 1):1983
Category Alloy Steel Alloy Steel
C (%) 0.14-0.19 0.36-0.44
Si (%) 0.17-0.37 Not specified
Mn (%) 0.50-0.80 0.45-0.70
Cr (%) 1.50-1.80 1.00-1.40
Ni (%) 1.40-1.70 1.30-1.70
Mo (%) 0.25-0.35 0.20-0.35
P (%) 0.025 max <=0.035
S (%) 0.035 max <=0.040
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 17CrNiMo6 BS 970 (Part 1) 817M40
Tensile Strength 1000-1200 MPa Not specified
Yield Strength 800-1000 MPa Not specified
Elongation 9-13% Not specified
Hardness 58-62 HRC (case) Not specified
Typical Applications
GB/T 3077 17CrNiMo6
Used for automotive gears, gearboxes, shafts, pinions, industrial reducers, and heavy machinery components.
BS 970 (Part 1) 817M40
Through hardening steel for mechanical and allied engineering purposes; supplied in the hardened and tempered conditions of Table 6.
Key Differences
Can GB/T 3077 17CrNiMo6 Be Substituted With BS 970 (Part 1) 817M40?
GB/T 3077 17CrNiMo6 and BS 970 (Part 1) 817M40 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.
Forms & Sizes Available on M-EX
GB/T 3077 17CrNiMo6
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 5800–6000 mm (228.35–236.22 in)
BS 970 (Part 1) 817M40
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On M-EX Right Now
GB/T 3077 17CrNiMo6
2 active listings and RFQs →
BS 970 (Part 1) 817M40
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Frequently Asked Questions
What is the difference between GB/T 3077 17CrNiMo6 and BS 970 (Part 1) 817M40?
GB/T 3077 17CrNiMo6 specifies Si which is not specified for BS 970 (Part 1) 817M40.
Can GB/T 3077 17CrNiMo6 be substituted with BS 970 (Part 1) 817M40?
GB/T 3077 17CrNiMo6 and BS 970 (Part 1) 817M40 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.