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BS 970 (Part 1) 708A30 vs JIS G4053 SCM430

Strong Match — 87.4% match based on chemical composition and mechanical property overlap.

BS 970 (Part 1) 708A30 (BS 970 (Part 1):1983) and JIS G4053 SCM430 (JIS G4053:2008) are both steel grades. Both fall under the Alloy Steel category. BS 970 (Part 1) 708A30 is typically used for through hardening steel for mechanical and allied engineering purposes; supplied in the hardened and tempered conditions of table 6., while JIS G4053 SCM430 is commonly used for chromium-molybdenum through-hardening (quenched and tempered) alloy steel; shafts, bolts, gears, and machine components requiring moderate strength and toughness. BS 970 (Part 1) 708A30 is defined under British Standards (BS), originating from United Kingdom, while JIS G4053 SCM430 is defined under Japanese Industrial Standards (JIS), originating from Japan.

As per chemical composition, BS 970 (Part 1) 708A30 vs JIS G4053 SCM430 is a 87.4% 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 87.4%.

Frequently Compared With BS 970 (Part 1) 708A30:
IS 1570 (Part 7) 10Cr36Mo10H IS 1570 (Part 7) 10Mo6H IS 4367 10Cr9Mo10 NF A35-565 100C6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 4) 10Cr20Mo6 IS 1570 (Part 4) 07Cr4Mo6 UNI 11234 100Cr6 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 10Mo6 IS 11169 (Part 1) 10Ni5Cr4
Match Breakdown
CHEMISTRY MATCH
87.4%
MECHANICAL MATCH
No shared data
OVERALL
87.4%
Specifications
Property BS 970 (Part 1) 708A30 JIS G4053 SCM430
Standard BS 970 (Part 1):1983 JIS G4053:2008
Category Alloy Steel Alloy Steel
C (%) 0.28-0.33 0.28-0.33
Mn (%) 0.40-0.60 0.60-0.85
Cr (%) 0.90-1.20 0.90-1.20
Mo (%) 0.15-0.25 0.15-0.25
P (%) <=0.035 <=0.030
S (%) <=0.040 <=0.030
Si (%) Not specified 0.15-0.35
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property BS 970 (Part 1) 708A30 JIS G4053 SCM430
Tensile Strength Not specified 930 MPa min
Yield Strength Not specified 785 MPa min
Elongation Not specified 12% min
Hardness Not specified 269-331 HB
Typical Applications
BS 970 (Part 1) 708A30
Through hardening steel for mechanical and allied engineering purposes; supplied in the hardened and tempered conditions of Table 6.
JIS G4053 SCM430
Chromium-molybdenum through-hardening (quenched and tempered) alloy steel; shafts, bolts, gears, and machine components requiring moderate strength and toughness
Key Differences
Can BS 970 (Part 1) 708A30 Be Substituted With JIS G4053 SCM430?
BS 970 (Part 1) 708A30 and JIS G4053 SCM430 overlap closely enough on chemistry and mechanical properties that JIS G4053 SCM430 is often considered as a substitute for BS 970 (Part 1) 708A30 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
BS 970 (Part 1) 708A30
No active listings currently.
JIS G4053 SCM430
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 5800–5900 mm (228.35–232.28 in)
On M-EX Right Now
BS 970 (Part 1) 708A30
0 active listings and RFQs →
JIS G4053 SCM430
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between BS 970 (Part 1) 708A30 and JIS G4053 SCM430?
JIS G4053 SCM430 specifies Si which is not specified for BS 970 (Part 1) 708A30.
Can BS 970 (Part 1) 708A30 be substituted with JIS G4053 SCM430?
BS 970 (Part 1) 708A30 and JIS G4053 SCM430 overlap closely enough on chemistry and mechanical properties that JIS G4053 SCM430 is often considered as a substitute for BS 970 (Part 1) 708A30 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.