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IS 1570 (Part 4) 30Ni16Cr5 vs BS 970 EN30A

Close Alternative — 73.7% match based on chemical composition and mechanical property overlap.

IS 1570 (Part 4) 30Ni16Cr5 (IS 1570 (Part 4):1988) and BS 970 EN30A (BS 970:1955) are both steel grades. Both fall under the Alloy Steel category. IS 1570 (Part 4) 30Ni16Cr5 is defined under Bureau of Indian Standards (IS), originating from India, while BS 970 EN30A is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, IS 1570 (Part 4) 30Ni16Cr5 vs BS 970 EN30A is a 98.1% match. As per mechanical properties, the match is 25%. Combined, this makes them a close alternative overall at 73.7%.

Frequently Compared With IS 1570 (Part 4) 30Ni16Cr5:
NF A35-565 100C6 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 07Cr4Mo6 UNI 11234 100Cr6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 4) 10Cr20Mo6 IS 1570 (Part 4) 10Mo6 IS 1570 (Part 7) 10Mo6H GB/T 3077 12Cr2Ni4A IS 4367 07Cr4Mo6 IS 1570 (Part 7) 12Cr2Mo5V2H
Match Breakdown
CHEMISTRY MATCH
98.1%
MECHANICAL MATCH
25%
OVERALL
73.7%
Specifications
Property IS 1570 (Part 4) 30Ni16Cr5 BS 970 EN30A
Standard IS 1570 (Part 4):1988 BS 970:1955
Category Alloy Steel Alloy Steel
C (%) 0.26-0.34 0.26-0.34
Si (%) 0.10-0.35 0.10-0.35
Mn (%) 0.40-0.70 0.40-0.60
Ni (%) 3.90-4.30 3.90-4.30
Cr (%) 1.10-1.40 1.10-1.40
S (%) Not specified <=0.050
P (%) Not specified <=0.050
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property IS 1570 (Part 4) 30Ni16Cr5 BS 970 EN30A
Tensile Strength >=1540 MPa ≥1544 MPa (100 tons/sq in, converted)
Yield Strength >=1240 MPa (0.2 % proof stress) ≥1313 MPa (85 tons/sq in, converted)
Elongation >=8% ≥10%
Izod Impact >=14 J Not specified
Hardness >=444 HBS (guidance only) 444 HB
Condition Bars and forgings, hardened and tempered (oil hardened unless stated), limiting ruling section 150 (oil hardened) mm Air hardened and tempered (lowest-strength condition of the standard)
Typical Applications
IS 1570 (Part 4) 30Ni16Cr5
Not documented
BS 970 EN30A
Used for gears, aircraft components, transmission shafts, heavy-duty pinions, crankshafts, and high-strength fasteners.
Key Differences
Can IS 1570 (Part 4) 30Ni16Cr5 Be Substituted With BS 970 EN30A?
IS 1570 (Part 4) 30Ni16Cr5 and BS 970 EN30A 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.
Forms & Sizes Available on M-EX
IS 1570 (Part 4) 30Ni16Cr5
No active listings currently.
BS 970 EN30A
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 6400–6600 mm (251.97–259.84 in)
On M-EX Right Now
IS 1570 (Part 4) 30Ni16Cr5
0 active listings and RFQs →
BS 970 EN30A
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between IS 1570 (Part 4) 30Ni16Cr5 and BS 970 EN30A?
BS 970 EN30A specifies S, P which are not specified for IS 1570 (Part 4) 30Ni16Cr5.
Can IS 1570 (Part 4) 30Ni16Cr5 be substituted with BS 970 EN30A?
IS 1570 (Part 4) 30Ni16Cr5 and BS 970 EN30A 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.