NM450 is liquid-quenched and tempered and through-hardened. The result is a plate with excellent abrasion resistance and high impact resistance. The outstanding wear characteristics can be attributed to the balanced chemistry and very fine distribution of Chromium, Boron, Titanium and Molybdenum.
The resulting carbides reinforce the plate structure and provide uniform through-hardness.
NM450 can be formed and machined, but special steps must be taken.
NM450 is available in thicknesses from 1/4" to 4"
NM450 up to 1″ can be cut by gas, abrasive water jet, laser, or plasma after preheating to 250 degrees (F). For thicknesses greater than 1", the plate must be pre-heated to 300 degrees (F) before cutting. Plasma is recommended. Shearing is not recommended.
Chemistry Max %
C 0.27, Mn 1.00, P 0.025, S 0.010, Si 0.40
Ni 0.70, B 0.005, Cu 0.35, Ti 0.10, Mo 0.30, Cr 1.75
Mechanical Properties:
Hardness: 420 to 490 BHN
Yield Strength: 180 – 190 KSI
Tensile Strength: 225 – 235 KSI
Elongation: 8 – 12%
NM450 provides a unique combination of chemical analysis, heat treating and quenching. This improved wear resistance can be attributed to the combination of the very fine distribution of Chromium and Molybdenum carbides reinforcing the plate structure and the plates work hardening capability.
It is often used in applications such as dump truck bodies, bucket liners, and conveyor systems.
