NM400 NM450 NM500 Steel Service Wear-Resistant Steel
Service:
| SERVICE | DESCRIPTION |
| Cutting | 1. Can be cut by plasma, laser, water jet, arc gouge, and abrasive saw cutting; 2. Cannot be cut by oxy-fuel. |
| Welding |
1. Use 480 MPa (70 ksi) or 560 MPa (80 ksi) consumable to join base metal; 2. After welding, joint should be capped by overlay for wear protection. |
| Machining |
1. Not machinable by conventional methods; 2. Can be finished by grinding only; 3. Countersunk holes can be precisely produced by EDM (Electrical Discharge Machining). |
| Forming |
1. Commonly formed with overlay to the inside; 2. For pipes with diameters smaller than 0.6m (24″), hardfacing pipe recommended instead of pipes fabricated from hardfacing plate. |
| Drilling |
1. When drilling, the distance between two holes should be at least 15mm (5/8”); otherwise, the partition may not be strong enough and can crack; 2. The minimum diameter of holes should be equal to the thickness of the plates. For thicker plates with a total thickness over 20mm (3/4”), the minimum diameter should be 1.5 times the thickness of the plate. |
