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IS 11169 (Part 1) 40C8 vs IS 1570 (Part 7) 12C7H

Related Material — 69.9% match based on chemical composition and mechanical property overlap.

IS 11169 (Part 1) 40C8 (IS 11169 (Part 1):2022) and IS 1570 (Part 7) 12C7H (IS 1570 (Part 7):1992) 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 IS 1570 (Part 7) 12C7H is commonly used for boilers, pressure vessels, steam turbines, steam and water piping and other power plant equipment working at elevated temperature. IS 11169 (Part 1) 40C8 is defined under Bureau of Indian Standards (IS), originating from India, while IS 1570 (Part 7) 12C7H is defined under Bureau of Indian Standards (IS), originating from India.

As per chemical composition, IS 11169 (Part 1) 40C8 vs IS 1570 (Part 7) 12C7H is a 77.5% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a related material overall at 69.9%.

Frequently Compared With IS 11169 (Part 1) 40C8:
BS 970 (Part 1) 040A10 BS 970 (Part 3) 070M55 BS 970 (Part 1) 040A12 BS 970 (Part 3) 045A10 BS 970 (Part 1) 045M10 BS 970 (Part 1) 040A04 BS 970 (Part 1) 045A10 BS 970 (Part 1) 045A10 BS 970 (Part 3) 045M10 BS 970 (Part 1) 055M15 BS 970 (Part 1) 060A32 BS 970 (Part 1) 045M10
Match Breakdown
CHEMISTRY MATCH
77.5%
MECHANICAL MATCH
No shared data
OVERALL
69.9%
Specifications
Property IS 11169 (Part 1) 40C8 IS 1570 (Part 7) 12C7H
Standard IS 11169 (Part 1):2022 IS 1570 (Part 7):1992
Category Carbon Steel Carbon Steel
C (%) 0.35-0.45 <=0.17
Cr (%) <=0.15 <=0.25
Cu (%) <=0.15 <=0.30
Mn (%) 0.60-0.90 0.40-1.00
Mo (%) <=0.05 Not specified
Ni (%) <=0.15 <=0.35
P (%) <=0.035 <=0.045
S (%) <=0.035 <=0.045
Si (%) 0.10-0.35 0.10-0.35
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 IS 1570 (Part 7) 12C7H
Core Hardness (CH) >=40 HRC up to 11 mm Not specified
Hardness, annealed (+AC) <=170 HBW Not specified
Tensile Strength Not specified 360-480 MPa
Yield Strength Not specified >=215 MPa (0.2 % proof stress)
Elongation Not specified >=24%
Condition Not specified Seamless pipe and pipe with seam, N, thickness - (first row of Table 3)
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)
IS 1570 (Part 7) 12C7H
Boilers, pressure vessels, steam turbines, steam and water piping and other power plant equipment working at elevated temperature
Key Differences
Can IS 11169 (Part 1) 40C8 Be Substituted With IS 1570 (Part 7) 12C7H?
IS 11169 (Part 1) 40C8 and IS 1570 (Part 7) 12C7H 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.
On M-EX Right Now
IS 11169 (Part 1) 40C8
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IS 1570 (Part 7) 12C7H
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Frequently Asked Questions
What is the difference between IS 11169 (Part 1) 40C8 and IS 1570 (Part 7) 12C7H?
IS 11169 (Part 1) 40C8 specifies Mo which is not specified for IS 1570 (Part 7) 12C7H.
Can IS 11169 (Part 1) 40C8 be substituted with IS 1570 (Part 7) 12C7H?
IS 11169 (Part 1) 40C8 and IS 1570 (Part 7) 12C7H 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.