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Impact AR600 Steel Plate

Impact 600 steel plate has a surface hardness of between 570-650 HBW (aim is 600 Brinell) and is designed for use in the manufacturing of medium to heavy-duty service vehicles and extended field use. Examples include ballistic applications, military and large transit vehicles, heavy commercial construction and extreme-load hauling. A high-strength steel for heavier use applications, greater load demand and longer wear resistance.

High strength alloyed plate quench and tempered to a nominal 600 Brinell hardness. After heat treatment, product is intended for use in applications requiring extreme resistance to abrasion.


Sizing Specifications

up to 60" 0.125" - 0.500" Impact AR600


Chemical Composition

  C Mn P S Si Cu Ni Cr Mo CE* typical
Max 0.51 1.00 0.018 0.015 0.50 0.25 2.00 1.00 0.50 0.84

*Carbon Equivalency calculated using the following formula: C.E. = C + Mn/6 + (Cr+Mo+V)/5 + (Ni+Cu)/15


Mechanical Properties

Surface Hardness 570 - 650 Brinell (aim 600 Brinell)
Methods Mechanical tests in accordance with ASTM A370, latest revision
Frequency Material to be tested per heat and per heat treat load

Tolerances and Packages

Processing This steel is produced to achieve fine-grained and clean microstructure with low levels of non-metallic inclusions. Material is subsequently heat treated to achieve mechanical property requirements.
Flatness Tolerance ASTM A6 Table 14
Thickness Tolerance +/- 0.012"
Width Tolerance -0/+1.25" unless specially ordered
Length Tolerance -0/+1" unless specially ordered


Impact AR600 is very difficult to weld due to relatively high carbon and alloying element content and extremely high strength of the material leading to potential cracking in heat affected zone (HAZ). Special precautions must be taken when welding.


CMTR Information Provided

  • Heat number, and chemical analysis of all elements listed from ladle analysis.
  • Hardness test results for each heat/thickness.
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