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Cobalt-Restricted Stainless Steel Plate

The largest inventory of stainless steel and nickel alloy plate for the nuclear industry just got larger!

Available thicknesses for 304CO:

1/4" 3/8" 1/2" 5/8" 3/4" 7/8" 1" 1 1/4"
6.3mm 9.5mm 12.7mm 15.9mm 19mm 22.2mm 25.4mm 31.8mm
1 1/2" 1 3/4" 2" 2 1/4" 2 1/2" 3" 3 1/4"
38.1mm 44.5mm 50.8mm 57.2mm 63.5mm 76.2mm 82.6mm

Specifications: ASME SA240, ASTM A240
All Material Will Have Passed an Intergranular Corrosion Test, ASTM A262 Practice E

Most Thicknesses Can Be Dual Certified as Either 304L (UNSS30403) or 304H (UNSS30409)

ASTM Quality System Certificate
An ASME Section III Quality System Certificate Holder for Nuclear Material Organizations - ASME Certificate Number QSC-619


Specification Sheet Overview

for Alloy 304CO (UNSS30400):

  • 0.050% Max. Cobalt
  • 0.010% Max. Sulfur
Cobalt-Restricted Stainless Steel Plate

NOTE: The information and data in this product data sheet are accurate to the best of our knowledge and belief, but are intended for informational purposes only, and may be revised at any time without notice. Applications suggested for the materials are described only to help readers make their own evaluations and decisions, and are neither guarantees nor to be construed as express or implied warranties of suitability for these or other applications. Stainless Steel, Nickel Alloy and Titanium products are classified as sheet if the thickness of the metals is less than 3/16 (4.7mm). If the thickness of the metal is 3/16 (4.7mm) or more, then it is considered a plate.