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

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

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

As per chemical composition, IS 1570 (Part 4) 42Cr4Mo2 vs UNI 7845 42CrMo4 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 IS 1570 (Part 4) 42Cr4Mo2:
GOST 4543 12HN3A NF A35-565 100C6 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 4) 10Mo6 GB/T 3077 12Cr2Ni4A IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 07Cr4Mo6 UNI 11234 100Cr6 IS 1570 (Part 4) 10Cr20Mo6 IS 4367 07Cr4Mo6 IS 1570 (Part 7) 10Cr36Mo10H
Match Breakdown
CHEMISTRY MATCH
95.6%
MECHANICAL MATCH
No shared data
OVERALL
95.6%
Specifications
Property IS 1570 (Part 4) 42Cr4Mo2 UNI 7845 42CrMo4
Standard IS 1570 (Part 4):1988 UNI 7845:1978
Category Alloy Steel Alloy Steel
C (%) 0.38-0.45 0.38-0.45
Si (%) 0.10-0.35 <=0.40
Mn (%) 0.60-0.90 0.60-0.90
Cr (%) 0.90-1.20 0.90-1.20
Mo (%) 0.15-0.30 0.15-0.30
P (%) Not specified <=0.025
S (%) Not specified <=0.035
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) 42Cr4Mo2 UNI 7845 42CrMo4
Tensile Strength Not specified 900-1100 MPa
Yield Strength Not specified 700-900 MPa
Elongation Not specified 11-16 %
Hardness Not specified 248-320 HB
Typical Applications
IS 1570 (Part 4) 42Cr4Mo2
Not documented
UNI 7845 42CrMo4
shafts,gears,axles,studs,forgings,machine components,automotive parts,hydraulic parts
Key Differences
Can IS 1570 (Part 4) 42Cr4Mo2 Be Substituted With UNI 7845 42CrMo4?
IS 1570 (Part 4) 42Cr4Mo2 and UNI 7845 42CrMo4 overlap closely enough on chemistry and mechanical properties that UNI 7845 42CrMo4 is often considered as a substitute for IS 1570 (Part 4) 42Cr4Mo2 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
IS 1570 (Part 4) 42Cr4Mo2
No active listings currently.
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)
On M-EX Right Now
IS 1570 (Part 4) 42Cr4Mo2
0 active listings and RFQs →
UNI 7845 42CrMo4
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between IS 1570 (Part 4) 42Cr4Mo2 and UNI 7845 42CrMo4?
UNI 7845 42CrMo4 specifies P, S which are not specified for IS 1570 (Part 4) 42Cr4Mo2.
Can IS 1570 (Part 4) 42Cr4Mo2 be substituted with UNI 7845 42CrMo4?
IS 1570 (Part 4) 42Cr4Mo2 and UNI 7845 42CrMo4 overlap closely enough on chemistry and mechanical properties that UNI 7845 42CrMo4 is often considered as a substitute for IS 1570 (Part 4) 42Cr4Mo2 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.