Type W (ALMANITE®) are a series of austenitic-martensitic white irons characterized by high hardness and relatively good impact strength.
Type W1 has a pearlitic matrix.
Type W2 has a martensitic matrix.
Type W4 is highly alloyed to provide an austenitic matrix in the as-cast condition which may be further modified to give a martensitic matrix
by heat treatment or by freezing.
Type WS is a hard wearing martensitic iron with exceptional impact strength…not readily machinable… work hardens in service to high hardness values.
Type WSH is an austenitic nodular iron possessing superior tensile strength; toughness and ability to work harden under conditions of severe pounding impact. It is extremely difficult to machine.
| PROPERTY | TYPE W1 as-cast | TYPE W2 as-cast | TYPE W4 heat-treated | TYPE WS | TYPE WSH |
|---|---|---|---|---|---|
| Tensile Strength-psi | 50/60,000 | 50/60,000 | 60/80,000 | 60/80,000 | > 100,000 |
| Yield Strength-psi | 50/65,000 | 75,000 | |||
| Modulus of Elasticity-psi | 26,000,000 | 26,000,000 | 24,000,000 | 24,000,000 | |
| Elongation % | 2-4 | 4-10 | |||
| Brinell Hardness (Nominal) | 500/600 | 500-600 | 400/700 | 400/525 | 350/500 |
| Izod Impact 1.2" bar unnotched ft. lb. | 30-50 | 40-60 | 40-70 | up to 180 | up to 120 |