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UNI 7846 18CrMo4 vs IS 1570 (Part 7) 10Cr36Mo10H

Minimal Match — 42.1% match based on chemical composition and mechanical property overlap.

UNI 7846 18CrMo4 (UNI 7846:1978) and IS 1570 (Part 7) 10Cr36Mo10H (IS 1570 (Part 7):1992) are both steel grades. Both fall under the Alloy Steel category. UNI 7846 18CrMo4 is typically used for used in gears, shafts, pinions, crankshafts, axles, and heavy machinery components., while IS 1570 (Part 7) 10Cr36Mo10H is commonly used for boilers, pressure vessels, steam turbines, steam and water piping and other power plant equipment working at elevated temperature. UNI 7846 18CrMo4 is defined under Ente Nazionale Italiano di Unificazione (UNI), originating from Italy, while IS 1570 (Part 7) 10Cr36Mo10H is defined under Bureau of Indian Standards (IS), originating from India.

As per chemical composition, UNI 7846 18CrMo4 vs IS 1570 (Part 7) 10Cr36Mo10H is a 63.1% match. As per mechanical properties, the match is 0%. Combined, this makes them a minimal match overall at 42.1%.

Frequently Compared With UNI 7846 18CrMo4:
GB/T 3077 12Cr2Ni4A UNI 11234 100Cr6 NF A35-565 100C6 GOST 4543 12HN3A IS 4367 07Cr4Mo6 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 105Cr5 IS 4367 10Cr9Mo10 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 4) 10Cr20Mo6 EN 10028-2 10CrMo9-10
Match Breakdown
CHEMISTRY MATCH
63.1%
MECHANICAL MATCH
0%
OVERALL
42.1%
Specifications
Property UNI 7846 18CrMo4 IS 1570 (Part 7) 10Cr36Mo10H
Standard UNI 7846:1978 IS 1570 (Part 7):1992
Category Alloy Steel Alloy Steel
C (%) 0.15-0.21 <=0.15
Si (%) 0.15-0.40 0.25-1.0
Mn (%) 0.60-0.90 0.30-0.60
Cr (%) 0.90-1.20 8.00-10.00
Mo (%) 0.15-0.30 0.90-1.10
P (%) 0.035 max <=0.040
S (%) 0.035 max <=0.030
Al (metallic) (%) Not specified <=0.02
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property UNI 7846 18CrMo4 IS 1570 (Part 7) 10Cr36Mo10H
Tensile Strength 700-900 MPa 410-560 MPa
Yield Strength 540 MPa min >=135 MPa (0.2 % proof stress)
Elongation 14% min >=20%
Hardness 200-260 HB Not specified
Condition Not specified Pipes, A, thickness - (first row of Table 3)
Typical Applications
UNI 7846 18CrMo4
Used in gears, shafts, pinions, crankshafts, axles, and heavy machinery components.
IS 1570 (Part 7) 10Cr36Mo10H
Boilers, pressure vessels, steam turbines, steam and water piping and other power plant equipment working at elevated temperature
Key Differences
Can UNI 7846 18CrMo4 Be Substituted With IS 1570 (Part 7) 10Cr36Mo10H?
UNI 7846 18CrMo4 and IS 1570 (Part 7) 10Cr36Mo10H share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.
Forms & Sizes Available on M-EX
UNI 7846 18CrMo4
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 5200–5400 mm (204.72–212.6 in)
IS 1570 (Part 7) 10Cr36Mo10H
No active listings currently.
On M-EX Right Now
UNI 7846 18CrMo4
2 active listings and RFQs →
IS 1570 (Part 7) 10Cr36Mo10H
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Frequently Asked Questions
What is the difference between UNI 7846 18CrMo4 and IS 1570 (Part 7) 10Cr36Mo10H?
IS 1570 (Part 7) 10Cr36Mo10H specifies Al (metallic) which is not specified for UNI 7846 18CrMo4.
Can UNI 7846 18CrMo4 be substituted with IS 1570 (Part 7) 10Cr36Mo10H?
UNI 7846 18CrMo4 and IS 1570 (Part 7) 10Cr36Mo10H share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.