Low Alloy Steel ASTM A148 Gr 115-95

Designations: A148 115-95 · UNS D50950 · ISO 4990ASTM A148 Grade 115-95 is a high-strength low alloy cast steel, normally supplied quenched and tempered, for castings that must carry heavy loads in a compact section. It sits above Grade 105-85, trading some ductility for strength: 14% minimum elongation against 17%. Typical uses include mining and earthmoving parts, gear blanks and heavy structural fittings. Kormax casts A148 Gr 115-95 to order for customers in the United States and Canada.

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Chemical Composition

Low Alloy Steel ASTM A148 Gr 115-95 — chemical composition, % by weight
Element	Symbol	Range / limit %
Carbon	C	0.20–0.30
Manganese	Mn	0.60–0.90
Silicon	Si	0.60 max
Nickel	Ni	0.40–0.80
Chromium	Cr	0.40–0.80
Molybdenum	Mo	0.15–0.30
Phosphorus	P	0.05 max
Sulfur	S	0.06 max
Iron	Fe	Balance

Mechanical Properties

Low Alloy Steel ASTM A148 Gr 115-95 — mechanical properties
Property	Metric	Imperial
Tensile Strength, min	795 MPa	115 ksi
Yield Strength, min	655 MPa	95 ksi
Elongation, min	14%	14%
Reduction of Area, min	30%	30%
Hardness (Brinell), typical	255–302 HB	255–302 HB

Kormax typical foundry practice, not a composition specified by ASTM A148, which sets only phosphorus and sulfur limits. ASTM A148 specifies the mechanical properties; hardness is a typical value, not a requirement.

Comparable and Related Specifications

The standards and grades below may have similar composition, properties or applications, but they should not be treated as direct equivalents without review. Chemistry, heat treatment, toughness requirements and testing provisions can differ between standards.