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GB/T 699 25 vs BS 970 (Part 1) 040A10

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

GB/T 699 25 (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 25 is typically used for hot-rolled or forged quality carbon structural steel bars up to 250 mm, 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 25 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 25 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 25:
BS 970 (Part 1) 045A10 BS 970 (Part 1) 045A10 BS 970 (Part 3) 045A10 BS 970 (Part 1) 040A04 BS 970 (Part 1) 040A12 BS 970 (Part 1) 045M10 BS 970 (Part 1) 045M10 BS 970 (Part 3) 045M10 BS 970 (Part 1) 055M15 BS 970 (Part 1) 060A32 BS 970 (Part 1) 060A40 BS 970 (Part 1) 060A45
Match Breakdown
CHEMISTRY MATCH
62%
MECHANICAL MATCH
No shared data
OVERALL
35%
Specifications
Property GB/T 699 25 BS 970 (Part 1) 040A10
Standard GB/T 699:2015 BS 970 (Part 1):1991
Category Carbon Steel Carbon Steel
C (%) 0.22-0.29 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 25 BS 970 (Part 1) 040A10
Tensile Strength >=450 MPa Not specified
Yield Strength >=275 MPa Not specified
Elongation >=23% Not specified
Condition Normalized 25 mm sample blank, bars up to 80 mm; hardness for delivery state Not specified
Typical Applications
GB/T 699 25
Hot-rolled or forged quality carbon structural steel bars up to 250 mm
BS 970 (Part 1) 040A10
Used for bolts, studs, shafts, brackets, fabricated components, and general engineering parts.
Key Differences
Can GB/T 699 25 Be Substituted With BS 970 (Part 1) 040A10?
GB/T 699 25 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 25
No active listings currently.
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 25
0 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 25 and BS 970 (Part 1) 040A10?
GB/T 699 25 specifies Si, P, S, Cr which are not specified for BS 970 (Part 1) 040A10.
Can GB/T 699 25 be substituted with BS 970 (Part 1) 040A10?
GB/T 699 25 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.