Post Stock Login Register

IS 11169 (Part 1) 40C8 vs GB/T 699 25

Close Alternative — 77.8% match based on chemical composition and mechanical property overlap.

IS 11169 (Part 1) 40C8 (IS 11169 (Part 1):2022) and GB/T 699 25 (GB/T 699:2015) are both steel grades. Both fall under the Carbon Steel category. IS 11169 (Part 1) 40C8 is typically used for cold heading and cold extrusion of parts that are quenched and tempered; the standard covers bars, wire rods and wires of 2 to 100 mm (clause 1.1, annex c), while GB/T 699 25 is commonly used for hot-rolled or forged quality carbon structural steel bars up to 250 mm. IS 11169 (Part 1) 40C8 is defined under Bureau of Indian Standards (IS), originating from India, while GB/T 699 25 is defined under Guobiao Standards (GB/T), originating from China.

As per chemical composition, IS 11169 (Part 1) 40C8 vs GB/T 699 25 is a 77.8% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a close alternative overall at 77.8%.

Frequently Compared With IS 11169 (Part 1) 40C8:
BS 970 (Part 3) 070M55 BS 970 (Part 1) 040A10 BS 970 (Part 1) 040A12 BS 970 (Part 1) 045A10 BS 970 (Part 3) 045A10 BS 970 (Part 1) 045M10 BS 970 (Part 1) 040A04 BS 970 (Part 1) 045A10 BS 970 (Part 1) 045M10 BS 970 (Part 3) 045M10 BS 970 (Part 1) 055M15 BS 970 (Part 1) 060A32
Match Breakdown
CHEMISTRY MATCH
77.8%
MECHANICAL MATCH
No shared data
OVERALL
77.8%
Specifications
Property IS 11169 (Part 1) 40C8 GB/T 699 25
Standard IS 11169 (Part 1):2022 GB/T 699:2015
Category Carbon Steel Carbon Steel
C (%) 0.35-0.45 0.22-0.29
Cr (%) <=0.15 <=0.25
Cu (%) <=0.15 <=0.25
Mn (%) 0.60-0.90 0.50-0.80
Mo (%) <=0.05 Not specified
Ni (%) <=0.15 <=0.30
P (%) <=0.035 <=0.035
S (%) <=0.035 <=0.035
Si (%) 0.10-0.35 0.17-0.37
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property IS 11169 (Part 1) 40C8 GB/T 699 25
Core Hardness (CH) >=40 HRC up to 11 mm Not specified
Hardness, annealed (+AC) <=170 HBW Not specified
Tensile Strength Not specified >=450 MPa
Yield Strength Not specified >=275 MPa
Elongation Not specified >=23%
Condition Not specified Normalized 25 mm sample blank, bars up to 80 mm; hardness for delivery state
Typical Applications
IS 11169 (Part 1) 40C8
Cold heading and cold extrusion of parts that are quenched and tempered; the standard covers bars, wire rods and wires of 2 to 100 mm (clause 1.1, Annex C)
GB/T 699 25
Hot-rolled or forged quality carbon structural steel bars up to 250 mm
Key Differences
Can IS 11169 (Part 1) 40C8 Be Substituted With GB/T 699 25?
IS 11169 (Part 1) 40C8 and GB/T 699 25 are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.
On M-EX Right Now
IS 11169 (Part 1) 40C8
0 active listings and RFQs →
GB/T 699 25
0 active listings and RFQs →
Frequently Asked Questions
What is the difference between IS 11169 (Part 1) 40C8 and GB/T 699 25?
IS 11169 (Part 1) 40C8 specifies Mo which is not specified for GB/T 699 25.
Can IS 11169 (Part 1) 40C8 be substituted with GB/T 699 25?
IS 11169 (Part 1) 40C8 and GB/T 699 25 are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.