Strong Match — 88.7% match
based on chemical composition and mechanical property overlap.
IS 4432 15C8 (IS 4432:1988) and SAE J403 1018 (SAE J403:2001) are both steel grades.
Both fall under the Carbon Steel category.
IS 4432 15C8 is typically used for forgings and fabrication of case-hardened machine or automobile parts, while SAE J403 1018 is commonly used for chemistry-only grade; product scope as listed in the composition notes.
IS 4432 15C8 is defined under Bureau of Indian Standards (IS), originating from India, while SAE J403 1018 is defined under SAE International, originating from United States.
As per chemical composition, IS 4432 15C8 vs SAE J403 1018 is a 88.7% match.
Mechanical property data is not available for both grades, so this factor could not be scored.
Combined, this makes them a strong match overall at 88.7%.
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property
IS 4432 15C8
SAE J403 1018
Core Tensile Strength
600-850 MPa (16 mm) / 550-800 MPa (30 mm)
Not specified
Core Yield Strength
>=400 MPa (16 mm) / >=330 MPa (30 mm)
Not specified
Core Elongation
>=12% (16 mm) / >=14% (30 mm)
Not specified
Core Reduction of Area
>=35% (16 mm) / >=40% (30 mm)
Not specified
Hardness, annealed (A)
<=150 HB
Not specified
Typical Applications
IS 4432 15C8
Forgings and fabrication of case-hardened machine or automobile parts
SAE J403 1018
Chemistry-only grade; product scope as listed in the composition notes
Key Differences
IS 4432 15C8 specifies Si which is not specified for SAE J403 1018.
Can IS 4432 15C8 Be Substituted With SAE J403 1018?
IS 4432 15C8 and SAE J403 1018 overlap closely enough on chemistry and mechanical properties that SAE J403 1018 is often considered as a substitute for IS 4432 15C8 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.
What is the difference between IS 4432 15C8 and SAE J403 1018?
IS 4432 15C8 specifies Si which is not specified for SAE J403 1018.
Can IS 4432 15C8 be substituted with SAE J403 1018?
IS 4432 15C8 and SAE J403 1018 overlap closely enough on chemistry and mechanical properties that SAE J403 1018 is often considered as a substitute for IS 4432 15C8 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.