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Grade 50 Floor Plate Steel

Grade 50 Steel

Steel Warehouse supplies grade 50 steel in a number of shapes, perfect for uses in a variety of industries and applications.

US 4-Way Safety Plate

Gauge Thickness:.059" to .375"
Width:Up to 72"
Standards:ASTM 786
Grades:CQ, A36 High Strength and Grade 50
Source:Strip Mill Coil
Patterns:U.S. Four-Way Safety Plate with medium size relief lug pattern

What is Grade 50 Steel? 

Grade 50 steel is a high-strength low alloy steel with a minimum yield strength of 50 ksi and minimum tensile strength of 65 ksi. Grade 50 contains more alloying elements than a plain carbon steel and has a greater resistance to atmospheric corrosion.


Perhaps the most important property of Grade 50 steel is its minimum yield and tensile strengths of 50 and 65 ksi, respectively. Additionally, it can be easily welded by commercial methods and can also be annealed if required. 

  • Machinability = Fair 
  • Formability = Difficult 
  • Weldability = Excellent 
  • Atmospheric Corrosion Resistance = Good 


Grade 50 conforms to ASTM A572 standards. You can view our ASTM A572 products here


Grade 50 is a general use grade, suitable for a number of applications. Most commonly it is used in general plate applications where it can be riveted, bolted, or welded. It is also used for structural applications like bridges and structural steel shapes and applications that require a higher strength to weight ratio. More applications include: 


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