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GB/T 699 45 vs BS 970 (Part 1) 080A20

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

GB/T 699 45 (GB/T 699:2015) and BS 970 (Part 1) 080A20 (BS 970 (Part 1):1991) are both steel grades. Both fall under the Carbon Steel category. GB/T 699 45 is typically used for used for shafts, gears, bolts, connecting rods, axles, and hydraulic components., while BS 970 (Part 1) 080A20 is commonly used for used for nuts, bolts, hydraulic fittings, precision turned parts, sleeves, and couplings.. GB/T 699 45 is defined under Guobiao Standards (GB/T), originating from China, while BS 970 (Part 1) 080A20 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, GB/T 699 45 vs BS 970 (Part 1) 080A20 is a 63.4% 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 45:
BS 970 (Part 3) 070M55 BS 970 (Part 1) 040A10 BS 970 (Part 1) 040A12 BS 970 (Part 1) 045A10 BS 970 (Part 1) 045M10 BS 970 (Part 1) 040A04 BS 970 (Part 1) 055M15 BS 970 (Part 1) 060A32 BS 970 (Part 3) 045A10 BS 970 (Part 1) 045M10 BS 970 (Part 3) 045M10 BS 970 (Part 1) 045A10
Match Breakdown
CHEMISTRY MATCH
63.4%
MECHANICAL MATCH
No shared data
OVERALL
35%
Specifications
Property GB/T 699 45 BS 970 (Part 1) 080A20
Standard GB/T 699:2015 BS 970 (Part 1):1991
Category Carbon Steel Carbon Steel
C (%) 0.42-0.50 0.18-0.23
Si (%) 0.17-0.37 Not specified
Mn (%) 0.50-0.80 0.70-0.90
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 45 BS 970 (Part 1) 080A20
Tensile Strength >=600 MPa Not specified
Yield Strength >=355 MPa Not specified
Elongation >=16% Not specified
Hardness <=229 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 45
Used for shafts, gears, bolts, connecting rods, axles, and hydraulic components.
BS 970 (Part 1) 080A20
Used for nuts, bolts, hydraulic fittings, precision turned parts, sleeves, and couplings.
Key Differences
Can GB/T 699 45 Be Substituted With BS 970 (Part 1) 080A20?
GB/T 699 45 and BS 970 (Part 1) 080A20 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 45
Round Bar → (2 listings)
Diameter: 40–40 mm (1.57–1.57 in)
Length: 5600–6600 mm (220.47–259.84 in)
BS 970 (Part 1) 080A20
Round Bar → (2 listings)
Diameter: 40–40 mm (1.57–1.57 in)
Length: 4800–6600 mm (188.98–259.84 in)
On M-EX Right Now
GB/T 699 45
2 active listings and RFQs →
BS 970 (Part 1) 080A20
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between GB/T 699 45 and BS 970 (Part 1) 080A20?
GB/T 699 45 specifies Si, P, S, Cr which are not specified for BS 970 (Part 1) 080A20.
Can GB/T 699 45 be substituted with BS 970 (Part 1) 080A20?
GB/T 699 45 and BS 970 (Part 1) 080A20 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.