Ni-Hard Iron

Designations: Ni-Hard 1 · UNS F45000 · ASTM A532 Cl. I Type ANi-Hard is a martensitic white cast iron alloyed with 3.3–5.0% nickel and 1.4–4.0% chromium, developed for sliding and low-impact abrasion. The nickel suppresses pearlite formation so the casting hardens through section without heat treatment; the chromium forms the carbides that carry the wear. It is specified for mill liners, pump casings, slurry components and chute plate. Kormax casts Ni-Hard to ASTM A532 Class I Type A.

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Chemical Composition

Ni-Hard Iron — chemical composition, % by weight
Element	Symbol	Range / limit %
Carbon	C	2.8–3.6
Nickel	Ni	3.3–5.0
Chromium	Cr	1.4–4.0
Manganese	Mn	2.0 max
Silicon	Si	0.8 max
Phosphorus	P	0.30 max
Sulfur	S	0.15 max
Molybdenum	Mo	1.5 max
Iron	Fe	Balance

Mechanical Properties

Ni-Hard Iron — mechanical properties
Property	Metric	Imperial
Compressive Strength	2070 MPa	300 ksi
Transverse Strength	500 MPa	72 ksi
Hardness (Brinell), min	550 HB	550 HB

Compressive and transverse strength are typical published values. ASTM A532 specifies hardness only. Hardness runs to 690 HB depending on section thickness.

Got the numbers you needed? Kormax pours Ni-Hard in chemically bonded sand, green sand and shell mold casting.

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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.

ASTM: A532 Class I Type A (Ni-Cr-HC)
Common name: Ni-Hard 1
UNS: F45000
DIN: G-X330NiCr 4-2
EN (EU/US): GJH-X330NiCr 4-2
BS (British Standard): Grade 2B
BS EN 12513: EN-GJN-HV550