Impact 450 steel plate has a surface hardness of between 425-475 HBW (aim is 450) and is designed for use in the manufacturing of light to medium duty service vehicles and field use. Examples include cash-in-transit vehicles, light commercial construction and long-distance, OTR hauling.
Low alloy steel plate, quench and tempered to a nominal hardness of 450 HBW. Product is intended for use in applications requiring a combination of high abrasion resistance, formability and weldability.
*Carbon Equivalency calculated using the following formula: C.E. = C + Mn/6 + (Cr+Mo+V)/5 + (Ni+Cu)/15
*More stringent flatness/dimensional tolerances may be available upon request. Please inquire for more information.
Impact AR450 plate is more challenging to drill, machine and punch compared to as-rolled steels (grade 50-80K) due to higher hardness levels, but can be successfully accomplished with appropriate tools. Carbide tipped tools are recommended, but high speed steel tools can be used. Slightly lower speeds and higher pressures compared to as-rolled grades are recommended for proper chip formation.
Free bending should be performed utilizing maximum allowable bend radius to prevent cracking. Impact AR450 plates 0.313” (7.96 mm) thick and less can be bent using minimum radius of 4T. Larger bend radius is recommended for thicker plates.
Impact AR450 plate achieves its properties through quenching and tempering processes. Heating in fabrication (such as post-weld stress relieving) or in service must not exceed 400 Fahrenheit without risk of lowering the strength and hardness of the material.
Impact AR450 can be welded by conventional processes such as SMAW, SAW and GMAW provided that the weld procedures used are suitable for this grade and design of the welded structure. Proper weld procedures should include the following:
*These statements are general guidelines. CMC Impact Metals is not responsible for the results of any welding work performed.