Of today’s abrasion-resistant alloys, Ni-Hard 4 offers the greatest level of abrasion resistance. In addition to offering high abrasion resistance, Ni-Hard 4 is also more resistant to shock loads. This makes Ni-Hard 4 ideal for applications in dredge pumps where stones and other hard solid objects can be sucked into the pump.
The presence of chrome and nickel makes Ni-Hard 4 more resistant to corrosion than cast iron. Ni-Hard4 consists of chromium-iron carbides, retained in a martensitic/bainitic base structure.
Standards / designations
| EN 12513 SYM (EU) | EN-GJN-HV600 | ||
|---|---|---|---|
| EN 12513 NR (EU) | EN-JN2049 | ||
| DIN 1695 (DE) | G-X 320 CrNiSi 9-5-2 | ||
| WERKSTOFFNUMMER (DE) | 0.9630 | ||
| ASTM A532 (US) | Ni-HiCr, Class I type D | ||
| ALT | Ni-Hard 4 | ||
Mechanical properties
| Tensile strength | Rm | 500-600 | [N/mm2] |
|---|---|---|---|
| Elasticity modulus | Eo | 196 | [kN/mm2] |
| Brinell hardness | HB30 | 550-700 | [Kgf/mm2] |
| Rockwell hardness | HRc | 53-63 | |
Chemical composition
| Carbon | C | 2.60-3.20 | [%] |
|---|---|---|---|
| Silicon | Si | 1.80-2.00 | [%] |
| Manganese | Mn | 0.40-0.60 | [%] |
| Chromium | Cr | 8.00-9.00 | [%] |
| Nickel | Ni | 5.00-6.50 | [%] |
| Iron | Fe | Remainder | |
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