SS 17-4 PH stainless steel plates is type 630 martensitic stainless steel that uses niobium. It should not be used at temperatures above 300 degrees celsius and for cryogenic service. SS 17-4 PH stainless steel plate finds application in gate valves and nuclear waste processing. The SS 17-4 PH stainless steel plates as mentioned, produces the highest strength when heat treated in the 900 Fahrenheit. It is magnetic and easily welded for fabrication.
| annealed | specification values |
| tensile strength Rm | 1000-1100 MPa |
| elongation A | 5 - 8 |
| Aged at 480 ⁰C | specification values |
| tensile strength Rm | 1150 – 1350 MPa |
| elongation A | 7 - 15 |
630 stainless steel is precipitation, quenching water, martensitic stainless steel, and this grade has high strength, hardness and corrosion resistance and other characteristics. After heat treatment, the mechanical properties of the product more perfect, can reach up to 1100-1300 mpa (160-190 ksi) of the compressive strength. This grade can not be used at temperatures above 300 ° C (570 ° F) or at very low temperatures. It has good resistance to atmospheric and dilute acids or salts and has the same corrosion resistance as 304 and 430.
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