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GB/T 699 55 vs BS 970 (Part 1) 040A10

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

GB/T 699 55 (GB/T 699:2015) and BS 970 (Part 1) 040A10 (BS 970 (Part 1):1991) are both steel grades. Both fall under the Carbon Steel category. GB/T 699 55 is typically used for used for springs, wear plates, shafts, rollers, high-strength pins, and machine tools., while BS 970 (Part 1) 040A10 is commonly used for used for bolts, studs, shafts, brackets, fabricated components, and general engineering parts.. GB/T 699 55 is defined under Guobiao Standards (GB/T), originating from China, while BS 970 (Part 1) 040A10 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, GB/T 699 55 vs BS 970 (Part 1) 040A10 is a 62% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a minimal match overall at 35%.

Frequently Compared With GB/T 699 55:
BS 970 (Part 3) 070M55 BS 970 (Part 1) 080A20 BS 970 (Part 3) 045A10 BS 970 (Part 1) 040A12 BS 970 (Part 1) 045A10 BS 970 (Part 1) 045A10 BS 970 (Part 1) 045M10 BS 970 (Part 1) 045M10 BS 970 (Part 3) 045M10 BS 970 (Part 1) 060A57 BS 970 (Part 1) 040A04 BS 970 (Part 1) 055M15
Match Breakdown
CHEMISTRY MATCH
62%
MECHANICAL MATCH
No shared data
OVERALL
35%
Specifications
Property GB/T 699 55 BS 970 (Part 1) 040A10
Standard GB/T 699:2015 BS 970 (Part 1):1991
Category Carbon Steel Carbon Steel
C (%) 0.52-0.60 0.08-0.13
Si (%) 0.17-0.37 Not specified
Mn (%) 0.50-0.80 0.30-0.50
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 55 BS 970 (Part 1) 040A10
Tensile Strength >=645 MPa Not specified
Yield Strength >=380 MPa Not specified
Elongation >=13% Not specified
Hardness <=255 HB (as delivered, not heat treated) Not specified
Condition Normalized 25 mm sample blank, bars up to 80 mm; hardness for delivery state Not specified
Typical Applications
GB/T 699 55
Used for springs, wear plates, shafts, rollers, high-strength pins, and machine tools.
BS 970 (Part 1) 040A10
Used for bolts, studs, shafts, brackets, fabricated components, and general engineering parts.
Key Differences
Can GB/T 699 55 Be Substituted With BS 970 (Part 1) 040A10?
GB/T 699 55 and BS 970 (Part 1) 040A10 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 55
Round Bar → (2 listings)
Diameter: 40–40 mm (1.57–1.57 in)
Length: 5600–6300 mm (220.47–248.03 in)
BS 970 (Part 1) 040A10
Round Bar → (2 listings)
Diameter: 40–40 mm (1.57–1.57 in)
Length: 4700–5500 mm (185.04–216.54 in)
On M-EX Right Now
GB/T 699 55
2 active listings and RFQs →
BS 970 (Part 1) 040A10
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between GB/T 699 55 and BS 970 (Part 1) 040A10?
GB/T 699 55 specifies Si, P, S, Cr which are not specified for BS 970 (Part 1) 040A10.
Can GB/T 699 55 be substituted with BS 970 (Part 1) 040A10?
GB/T 699 55 and BS 970 (Part 1) 040A10 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.