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MTS stocks Stainless Steel (SS) plate in 303,  304/304L, 316/316L grades.

In addition,  we carry selected SS plates for High Engineered and Aerospace applications including:

17-4 PH, 15-5PH, 13-8 Mo and 17-7 PH plates.


Stainless steel, also known as Inox steel or Inox from French "inoxydable", is a steel alloy with a minimum of 10.5% to 11% chromium content by mass. Balance contains levels of nickel, molybdenum, and niobium.

SS resist to corrosion, however it is not fully stain-proof. It is also called corrosion-resistant steel or CRES when the alloy type and grade are not specified (specifically in Aerospace industry). There are several grades and surface finishes of stainless steel to suit wide range of applications. Stainless steel is mainly used where both steel mechanical properties are needed with increased values for corrosion resistance.


Stainless steel offers the following benefits for its users:

  • Stain and Corrosion Resistance

  • Heat and Fire Resistance

  • High strength-to-Weight Ratio

  • Recyclable

  • Appearance and Cleanliness


Several industries utilize stainless steel for wide range of applications including Aerospace, Automotive, General Engineering, Oil and Gas, High Tech and Medical.

SS plates Grades and Specifications:

  • 303 per ASTM A895

  • 304 per ASTM A240, ASTM A666 & ASME SA240, AMS 5511, AMS 5513, QQ-S-766   

  • 304 Polished per ASTM A240, ASTM A666 & ASME SA240, AMS 5511, AMS 5513, and QQ-S-766  

  • 316 per AMS 5524, AMS 5507, ASTM A240

  • 17-4 PH per AMS 5604, ASTM A693

  • 15-5PH per AMS 5862, ASTM A693

  • 13-8MO per AMS 5629, ASTM A564, ASTM A693, AMS 5864

  • 17-7PH per AMS 5528, ASTM A693

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