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JIS G4104 SCr440 vs BS 970 (Part 1) 530A40

Strong Match — 92% match based on chemical composition and mechanical property overlap.

JIS G4104 SCr440 (JIS G 4104:1979) and BS 970 (Part 1) 530A40 (BS 970 (Part 1):1983) are both steel grades. Both fall under the Alloy Steel category. JIS G4104 SCr440 is typically used for used in gears, shafts, bolts, spindles, couplings, and machine structural parts., while BS 970 (Part 1) 530A40 is commonly used for through hardening steel for mechanical and allied engineering purposes; supplied in the hardened and tempered conditions of table 6.. JIS G4104 SCr440 is defined under Japanese Industrial Standards (JIS), originating from Japan, while BS 970 (Part 1) 530A40 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, JIS G4104 SCr440 vs BS 970 (Part 1) 530A40 is a 92% 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 92%.

Frequently Compared With JIS G4104 SCr440:
NF A35-565 100C6 UNI 11234 100Cr6 GOST 4543 12HN3A GB/T 3077 12Cr2Ni4A IS 4367 07Cr4Mo6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 10Cr20Mo6 IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 7) 10Cr36Mo10H IS 4367 10Cr9Mo10
Match Breakdown
CHEMISTRY MATCH
92%
MECHANICAL MATCH
No shared data
OVERALL
92%
Specifications
Property JIS G4104 SCr440 BS 970 (Part 1) 530A40
Standard JIS G 4104:1979 BS 970 (Part 1):1983
Category Alloy Steel Alloy Steel
C (%) 0.38-0.43 0.38-0.43
Si (%) 0.15-0.35 Not specified
Mn (%) 0.60-0.85 0.60-0.80
P (%) 0.030 max <=0.035
S (%) 0.030 max <=0.040
Cr (%) 0.90-1.20 0.90-1.20
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property JIS G4104 SCr440 BS 970 (Part 1) 530A40
Tensile Strength 800-950 MPa Not specified
Yield Strength 590 MPa min Not specified
Elongation 13% min Not specified
Hardness 230-285 HB Not specified
Typical Applications
JIS G4104 SCr440
Used in gears, shafts, bolts, spindles, couplings, and machine structural parts.
BS 970 (Part 1) 530A40
Through hardening steel for mechanical and allied engineering purposes; supplied in the hardened and tempered conditions of Table 6.
Key Differences
Can JIS G4104 SCr440 Be Substituted With BS 970 (Part 1) 530A40?
JIS G4104 SCr440 and BS 970 (Part 1) 530A40 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 1) 530A40 is often considered as a substitute for JIS G4104 SCr440 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.
Forms & Sizes Available on M-EX
JIS G4104 SCr440
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 4500–6100 mm (177.17–240.16 in)
BS 970 (Part 1) 530A40
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On M-EX Right Now
JIS G4104 SCr440
2 active listings and RFQs →
BS 970 (Part 1) 530A40
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Frequently Asked Questions
What is the difference between JIS G4104 SCr440 and BS 970 (Part 1) 530A40?
JIS G4104 SCr440 specifies Si which is not specified for BS 970 (Part 1) 530A40.
Can JIS G4104 SCr440 be substituted with BS 970 (Part 1) 530A40?
JIS G4104 SCr440 and BS 970 (Part 1) 530A40 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 1) 530A40 is often considered as a substitute for JIS G4104 SCr440 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.