Stainless Steel Plate

Standard: 302, 304, 304L, 309, 316, 316L, 317, 321, 330, 403, 409, 416, 440C, Duplex 2507

Sizes: from 3/16" to 2" thick x 48" or 60" wide x 96/120/144 lengths

Chemical composition, mechanical properties, weldability and corrosion resistance provide the best all-round performance stainless steel plate at relatively low cost.

Stainless steels are a family of iron based alloys that contain a minimum of 10.5% chromium (CR). The presence of chromium creates an invisible surface film that resists oxidation and makes the material passive or corrosion resistant. There are multiple families of stainless steel which are designed for various applications and uses. Stainless grades can be further modified to meet various processing, corrosion, temperature and strength conditions.

Taking 304 and 304L stainless steel plates as an example, they are part of the austenitic family of stainless steel and they are one of the most versatile and widely used varieties of stainless plate. They are a relatively low cost stainless product and used in a variety of applications. 304 grades have excellent low temperature properties and respond well to hardening by cold working. 304 grades have good welding characteristics and post weld annealing is not normally required to restore performance. 304 SS has excellent corrosion resistance in a variety of different media. Typical specifications for 304 and 304L are ASTM A-240, ASME SA -240 and A666.

Chemical and Mechanical Properties of Stainless Steel Plate:

Typical chemical requirements
  304 304L 316/316L 321
Carbon, Max % 0.07 0.03 0.03 0.08
Manganese, Max % 2 2 2 2
Phosphorus, Max % 0.045 0.045 0.045 0.045
Sulphur, Max % 0.03 0.03 0.03 0.03
Silicon Max 0.75 0.75 0.75 0.75
Chromium range 17.5-19.5 17.5-19.5 16-18 17-19
Nickel range 8.0-10.5 80.-12 10-14 9-12
Nitrogen Max 0.1 0.1 0.1 0.1
Mechanical Properties
Tensile Min 75 ksi 70 ksi 75 ksi 75 ksi
Yield Min 30 ksi 25 ksi 25 ksi 30 ksi
Elongation Min 40% 40% 40% 40%
Hardness Max 95 HRB 95 HRB 95 HRB 95 HRB

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