Post Stock Login Register

GB/T 699 40 vs BS 970 (Part 1) 045A10

Minimal Match — 35% match based on chemical composition and mechanical property overlap.

GB/T 699 40 (GB/T 699:2015) and BS 970 (Part 1) 045A10 (BS 970 (Part 1):1991) are both steel grades. Both fall under the Carbon Steel category. GB/T 699 40 is typically used for used for gears, shafts, axles, crankshafts, couplings, and machine spindles., while BS 970 (Part 1) 045A10 is commonly used for case hardening steel (section four). GB/T 699 40 is defined under Guobiao Standards (GB/T), originating from China, while BS 970 (Part 1) 045A10 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, GB/T 699 40 vs BS 970 (Part 1) 045A10 is a 63.1% match. As per mechanical properties, the match is 0%. Combined, this makes them a minimal match overall at 35%.

Frequently Compared With GB/T 699 40:
BS 970 (Part 1) 040A10 BS 970 (Part 3) 070M55 BS 970 (Part 1) 080A20 BS 970 (Part 1) 040A04 BS 970 (Part 1) 045A10 BS 970 (Part 1) 060A40 BS 970 (Part 3) 045A10 BS 970 (Part 1) 055M15 BS 970 (Part 1) 040A12 BS 970 (Part 1) 045M10 BS 970 (Part 1) 045M10 BS 970 (Part 3) 045M10
Match Breakdown
CHEMISTRY MATCH
63.1%
MECHANICAL MATCH
0%
OVERALL
35%
Specifications
Property GB/T 699 40 BS 970 (Part 1) 045A10
Standard GB/T 699:2015 BS 970 (Part 1):1991
Category Carbon Steel Carbon Steel
C (%) 0.37-0.44 0.08-0.13
Si (%) 0.17-0.37 Not specified
Mn (%) 0.50-0.80 0.30-0.60
P (%) <=0.035 Not specified
S (%) <=0.035 Not specified
Cr (%) <=0.25 Not specified
Ni (%) <=0.30 Not specified
Cu (%) <=0.25 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 699 40 BS 970 (Part 1) 045A10
Tensile Strength >=570 MPa 430 MPa min
Yield Strength >=335 MPa Not specified
Elongation >=19% 18 % min
Hardness <=217 HB (as delivered, not heat treated) Not specified
Condition Normalized 25 mm sample blank, bars up to 80 mm; hardness for delivery state Case hardened, 19 mm test bar
Typical Applications
GB/T 699 40
Used for gears, shafts, axles, crankshafts, couplings, and machine spindles.
BS 970 (Part 1) 045A10
Case hardening steel (section four)
Key Differences
Can GB/T 699 40 Be Substituted With BS 970 (Part 1) 045A10?
GB/T 699 40 and BS 970 (Part 1) 045A10 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 699 40
Round Bar → (2 listings)
Diameter: 40–40 mm (1.57–1.57 in)
Length: 5000–7000 mm (196.85–275.59 in)
BS 970 (Part 1) 045A10
No active listings currently.
On M-EX Right Now
GB/T 699 40
2 active listings and RFQs →
BS 970 (Part 1) 045A10
0 active listings and RFQs →
Frequently Asked Questions
What is the difference between GB/T 699 40 and BS 970 (Part 1) 045A10?
GB/T 699 40 specifies Si, P, S, Cr which are not specified for BS 970 (Part 1) 045A10.
Can GB/T 699 40 be substituted with BS 970 (Part 1) 045A10?
GB/T 699 40 and BS 970 (Part 1) 045A10 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.