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UNI 7845 42CrMo4 vs IS 1570 (Part 4) 42Cr4Mo2

Strong Match — 95.6% match based on chemical composition and mechanical property overlap.

UNI 7845 42CrMo4 (UNI 7845:1978) and IS 1570 (Part 4) 42Cr4Mo2 (IS 1570 (Part 4):1988) are both steel grades. Both fall under the Alloy Steel category. UNI 7845 42CrMo4 is defined under Ente Nazionale Italiano di Unificazione (UNI), originating from Italy, while IS 1570 (Part 4) 42Cr4Mo2 is defined under Bureau of Indian Standards (IS), originating from India.

As per chemical composition, UNI 7845 42CrMo4 vs IS 1570 (Part 4) 42Cr4Mo2 is a 95.6% 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 95.6%.

Frequently Compared With UNI 7845 42CrMo4:
NF A35-565 100C6 UNI 11234 100Cr6 GOST 4543 12HN3A IS 1570 (Part 4) 103Cr6 IS 4367 07Cr4Mo6 IS 4367 10Cr9Mo10 IS 1570 (Part 4) 10Mo6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 7) 10Cr36Mo10H IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 4) 10Cr20Mo6
Match Breakdown
CHEMISTRY MATCH
95.6%
MECHANICAL MATCH
No shared data
OVERALL
95.6%
Specifications
Property UNI 7845 42CrMo4 IS 1570 (Part 4) 42Cr4Mo2
Standard UNI 7845:1978 IS 1570 (Part 4):1988
Category Alloy Steel Alloy Steel
C (%) 0.38-0.45 0.38-0.45
Si (%) <=0.40 0.10-0.35
Mn (%) 0.60-0.90 0.60-0.90
P (%) <=0.025 Not specified
S (%) <=0.035 Not specified
Cr (%) 0.90-1.20 0.90-1.20
Mo (%) 0.15-0.30 0.15-0.30
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property UNI 7845 42CrMo4 IS 1570 (Part 4) 42Cr4Mo2
Tensile Strength 900-1100 MPa Not specified
Yield Strength 700-900 MPa Not specified
Elongation 11-16 % Not specified
Hardness 248-320 HB Not specified
Typical Applications
UNI 7845 42CrMo4
shafts,gears,axles,studs,forgings,machine components,automotive parts,hydraulic parts
IS 1570 (Part 4) 42Cr4Mo2
Not documented
Key Differences
Can UNI 7845 42CrMo4 Be Substituted With IS 1570 (Part 4) 42Cr4Mo2?
UNI 7845 42CrMo4 and IS 1570 (Part 4) 42Cr4Mo2 overlap closely enough on chemistry and mechanical properties that IS 1570 (Part 4) 42Cr4Mo2 is often considered as a substitute for UNI 7845 42CrMo4 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
UNI 7845 42CrMo4
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 5000–6300 mm (196.85–248.03 in)
IS 1570 (Part 4) 42Cr4Mo2
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On M-EX Right Now
UNI 7845 42CrMo4
2 active listings and RFQs →
IS 1570 (Part 4) 42Cr4Mo2
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Frequently Asked Questions
What is the difference between UNI 7845 42CrMo4 and IS 1570 (Part 4) 42Cr4Mo2?
UNI 7845 42CrMo4 specifies P, S which are not specified for IS 1570 (Part 4) 42Cr4Mo2.
Can UNI 7845 42CrMo4 be substituted with IS 1570 (Part 4) 42Cr4Mo2?
UNI 7845 42CrMo4 and IS 1570 (Part 4) 42Cr4Mo2 overlap closely enough on chemistry and mechanical properties that IS 1570 (Part 4) 42Cr4Mo2 is often considered as a substitute for UNI 7845 42CrMo4 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.