High Hardness 17-7PH / 631 Stainless Steel Pipe Tube / Forging Pipe
High Hardness 17-7PH / 631 Stainless Steel Pipe Tube / Forging Pipe
| Products Name | 17-7PH Stainless Steel Pipe |
| Pipe Type | Seamless Pipe . Welded Pipe |
| Surface | Pickling , polishing |
| Out Diameter | 6 - 508mm |
| Wall Thickness | 1.0 - 50.0mm |
| Length | 6m or cutting any length as request |
| Standard | ASTM / GB / EN / DIN / JIS / BS / BIS |
| Mainly Grade | 304 304L 304H 309S 310S 316L 316Ti 317L 321 347 2205 2507 904L 254SMO 800/800H Alloy20 ,Hastelloy Alloy, Monel Alloy,Inconel Alloy |
| Service | Cutting, Polishing, Hairline Finishing |
| MOQ | 200 Kgs |
| Packing | standard packing for export |
| Application | Industrial , food , medical, househould |
17-7PH Stainless steel Pipe /17-7PH Stainless steel Tube, 631 Stainless Steel
17-7Ph is a type of Austenitic-Martensite precipitation hardened stainless steel developed base on 18-8CrN,that’s 631 stainless steel. After solid solution treatment, stainless steel 17-7ph will become unstable Austenite tissue, then cooling to precipitate carbide, and then Martensite transformation will be conducted. Most of the tissues will be transformed into low-carbon tempered Martensite with better toughness. The corrosion resistance of 17-7PH is better than that of ordinary Martensitic stainless steel.
17-7PH is characterized by high strength and hardness, excellent fatigue properties, good corrosion resistance and minimum distortion on heat treatment after heat treatment. The molding properties and elasticity of annealed 17-7PH are similar to 301. Under heat treatment conditions of TH1050 and RH950, the corrosion resistance of 631 is better than that of ordinary hardened stainless steels (such as 410, 420 and 431), but not as good as 304. After heat treatment, the corrosion resistance of CH900 is similar to 304 in most environments.
Available forms and specifications
| UNS | Specifications |
| S17700 | AMS 5568 Welded Tubing
AMS 5528 Sheet, Strip and Plate AMS 5529 Sheet, Strip Cold Rolled AMS 5644 Bars and Forgings (Cap. ASTM A 564 Type 631) AMS 5678 Wire AMS 5824 Welding Wire ASTM A 693, ASTM A 313, ASTM A 564, ASTM A 579 and ASTM A 705 ASME SA 564, SA 693 and SA 705 |
Chemical composition of 17-7PH Stainless Steel:
| C | Mn | Si | Cr | Ni | P | S | Al |
| ≤0.09 | ≤1.00 | ≤1.00 | 16.0~18.0 | 6.5~7.75 | ≤0.04 | ≤0.03 | 0.75~1.5 |
Mechanical Properties of 17-7PH Stainless Steel:
| Density,g/c㎡ | 7.65 Kg/m³ |
| Melting range,℃ | 1404-1440°C |
| Tensile strength, min, Mpa | 896 MPa |
| Yield strength, 0.2% offset, min, Mpa | MPa |
| Elongation, A5% | 35 |
| Hardness Rockwell C | B85 |
Applications:
- Chemical processing equipment
- Aerospace applications
- Oil and petroleum refining equipment
- Food processing equipment
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