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GB/T 3077 30CrMnTi vs BS 970 EN31

Related Material — 69.9% match based on chemical composition and mechanical property overlap.

GB/T 3077 30CrMnTi (GB/T 3077:2015) and BS 970 EN31 (BS 970:1955) are both steel grades. Both fall under the Alloy Steel category. GB/T 3077 30CrMnTi is typically used for hot-rolled or forged structural alloy steel bars, while BS 970 EN31 is commonly used for ball and roller bearings, gauges, dies. GB/T 3077 30CrMnTi is defined under Guobiao Standards (GB/T), originating from China, while BS 970 EN31 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, GB/T 3077 30CrMnTi vs BS 970 EN31 is a 69.7% match. As per mechanical properties, the match is 100%. Combined, this makes them a related material overall at 69.9%.

Frequently Compared With GB/T 3077 30CrMnTi:
IS 1570 (Part 7) 10Mo6H IS 4367 07Cr4Mo6 IS 1570 (Part 4) 07Cr4Mo6 NF A35-565 100C6 UNI 11234 100Cr6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 4) 10Cr20Mo6 IS 1570 (Part 7) 10Cr36Mo10H IS 4367 10Cr9Mo10 EN 10028-2 10CrMo9-10
Match Breakdown
CHEMISTRY MATCH
69.7%
MECHANICAL MATCH
100%
OVERALL
69.9%
Specifications
Property GB/T 3077 30CrMnTi BS 970 EN31
Standard GB/T 3077:2015 BS 970:1955
Category Alloy Steel Alloy Steel
C (%) 0.24-0.32 0.90-1.20
Si (%) 0.17-0.37 0.10-0.35
Mn (%) 0.80-1.10 0.30-0.75
Cr (%) 1.00-1.30 1.00-1.60
Ti (%) 0.04-0.10 Not specified
P (%) <=0.030 <=0.050
S (%) <=0.030 <=0.050
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 30CrMnTi BS 970 EN31
Tensile Strength >=1470 MPa Not specified
Elongation >=9% Not specified
Hardness <=229 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
Hardness (HB) Not specified ≤229 (softened)
Typical Applications
GB/T 3077 30CrMnTi
Hot-rolled or forged structural alloy steel bars
BS 970 EN31
Ball and roller bearings, gauges, dies
Key Differences
Can GB/T 3077 30CrMnTi Be Substituted With BS 970 EN31?
GB/T 3077 30CrMnTi and BS 970 EN31 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 30CrMnTi
No active listings currently.
BS 970 EN31
Round Bar → (23 listings)
Diameter: 40–50 mm (1.57–1.97 in)
Length: 2500–7000 mm (98.43–275.59 in)
Flat Bar → (3 listings)
Thickness: 25–25 mm (0.98–0.98 in)
Width: 120–120 mm (4.72–4.72 in)
Length: 2500–3600 mm (98.43–141.73 in)
Hex Bar → (3 listings)
Across Flats: 50–50 mm (1.97–1.97 in)
Length: 2600–3300 mm (102.36–129.92 in)
On M-EX Right Now
GB/T 3077 30CrMnTi
0 active listings and RFQs →
BS 970 EN31
29 active listings and RFQs →
Frequently Asked Questions
What is the difference between GB/T 3077 30CrMnTi and BS 970 EN31?
GB/T 3077 30CrMnTi specifies Ti, Cu which are not specified for BS 970 EN31.
Can GB/T 3077 30CrMnTi be substituted with BS 970 EN31?
GB/T 3077 30CrMnTi and BS 970 EN31 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.