IS 11169 (Part 1) 17C8BT vs BS 970 (Part 1) 527A17
Close Alternative — 72.5% match
based on chemical composition and mechanical property overlap.
IS 11169 (Part 1) 17C8BT (IS 11169 (Part 1):2022) and BS 970 (Part 1) 527A17 (BS 970 (Part 1):1983) are both steel grades.
Both fall under the Alloy Steel category.
IS 11169 (Part 1) 17C8BT 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 BS 970 (Part 1) 527A17 is commonly used for case hardening steel for mechanical and allied engineering purposes (table 11 mechanical properties)..
IS 11169 (Part 1) 17C8BT is defined under Bureau of Indian Standards (IS), originating from India, while BS 970 (Part 1) 527A17 is defined under British Standards (BS), originating from United Kingdom.
As per chemical composition, IS 11169 (Part 1) 17C8BT vs BS 970 (Part 1) 527A17 is a 72.5% 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 72.5%.
Frequently Compared With IS 11169 (Part 1) 17C8BT:
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) 17C8BT
BS 970 (Part 1) 527A17
Core Hardness (CH)
>=37 HRC up to 9 mm
Not specified
Tensile Strength, annealed (+AC)
<=460 MPa (over 5 to 25 mm)
Not specified
Typical Applications
IS 11169 (Part 1) 17C8BT
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)
BS 970 (Part 1) 527A17
Case hardening steel for mechanical and allied engineering purposes (Table 11 mechanical properties).
Key Differences
IS 11169 (Part 1) 17C8BT specifies B, Cu, Si which are not specified for BS 970 (Part 1) 527A17.
Can IS 11169 (Part 1) 17C8BT Be Substituted With BS 970 (Part 1) 527A17?
IS 11169 (Part 1) 17C8BT and BS 970 (Part 1) 527A17 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.
What is the difference between IS 11169 (Part 1) 17C8BT and BS 970 (Part 1) 527A17?
IS 11169 (Part 1) 17C8BT specifies B, Cu, Si which are not specified for BS 970 (Part 1) 527A17.
Can IS 11169 (Part 1) 17C8BT be substituted with BS 970 (Part 1) 527A17?
IS 11169 (Part 1) 17C8BT and BS 970 (Part 1) 527A17 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.