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SAE J404 4820 vs IS 4432 20Ni7Mo2-S

Related Material — 69.9% match based on chemical composition and mechanical property overlap.

SAE J404 4820 (SAE J404:2000) and IS 4432 20Ni7Mo2-S (IS 4432:1988) are both steel grades. Both fall under the Alloy Steel category. SAE J404 4820 is typically used for chemistry-only alloy steel grade; see the composition notes for product scope, while IS 4432 20Ni7Mo2-S is commonly used for forgings and fabrication of case-hardened machine or automobile parts. SAE J404 4820 is defined under SAE International, originating from United States, while IS 4432 20Ni7Mo2-S is defined under Bureau of Indian Standards (IS), originating from India.

As per chemical composition, SAE J404 4820 vs IS 4432 20Ni7Mo2-S is a 83.5% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a related material overall at 69.9%.

Frequently Compared With SAE J404 4820:
IS 1570 (Part 4) 10Cr20Mo6 NF A35-565 100C6 IS 1570 (Part 4) 105Cr5 IS 11169 (Part 1) 10Ni5Cr4 UNI 11234 100Cr6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 103Cr6 IS 4367 10Cr9Mo10 IS 1570 (Part 4) 10Mo6 IS 4367 07Cr4Mo6 IS 1570 (Part 7) 10Cr36Mo10H IS 1570 (Part 4) 07Cr4Mo6
Match Breakdown
CHEMISTRY MATCH
83.5%
MECHANICAL MATCH
No shared data
OVERALL
69.9%
Specifications
Property SAE J404 4820 IS 4432 20Ni7Mo2-S
Standard SAE J404:2000 IS 4432:1988
Category Alloy Steel Alloy Steel
C (%) 0.18-0.23 0.17-0.22
Mn (%) 0.50-0.70 0.40-0.65
Mo (%) 0.20-0.30 0.20-0.30
Ni (%) 3.25-3.75 1.65-2.00
P (%) <=0.030 <=0.035
S (%) <=0.040 0.020-0.035
Si (%) 0.15-0.35 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 SAE J404 4820 IS 4432 20Ni7Mo2-S
Core Tensile Strength Not specified 800-1150 MPa (16 mm) / 700-1000 MPa (30 mm) / 650-950 MPa (63 mm)
Core Yield Strength Not specified >=550 MPa (16 mm) / >=500 MPa (30 mm) / >=450 MPa (63 mm)
Core Elongation Not specified >=8% (16 mm) / >=9% (30 mm) / >=10% (63 mm)
Core Reduction of Area Not specified >=35% (16 mm) / >=35% (30 mm) / >=40% (63 mm)
Hardness, annealed (A) Not specified <=217 HB
Typical Applications
SAE J404 4820
Chemistry-only alloy steel grade; see the composition notes for product scope
IS 4432 20Ni7Mo2-S
Forgings and fabrication of case-hardened machine or automobile parts
Can SAE J404 4820 Be Substituted With IS 4432 20Ni7Mo2-S?
SAE J404 4820 and IS 4432 20Ni7Mo2-S 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.
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SAE J404 4820
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Frequently Asked Questions
What is the difference between SAE J404 4820 and IS 4432 20Ni7Mo2-S?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can SAE J404 4820 be substituted with IS 4432 20Ni7Mo2-S?
SAE J404 4820 and IS 4432 20Ni7Mo2-S 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.