Impact 500 steel plate has a surface hardness of between 470-540 HBW (aim is 500) and is designed for use in the manufacturing of medium-duty service vehicles and field use. Examples include medium to large transit vehicles, commercial construction and hauling. An optimal-strength steel for targets using magnum rounds.
Low alloy steel plate, quench and tempered to a nominal hardness of 500 HBW. After heat treatment, product is intended for use in applications requiring a combination of high abrasion resistance 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 AR500 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 AR500 plates 0.250” (6.35 mm) thick and less can be bent using minimum radius of 4T. Larger bend radius is recommended for thicker plates.
Impact AR500 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 AR500 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.