Silver Tubes is a leading manufacturer of seamless pipes and other associated components of pipes. It develops a wide variety of seamless pipes and exports significantly across the globe. Our company is known for producing equipment according to industrial standards. With our young and dynamic team of professionals, we manage to deliver the good quality products inconsiderable amount of time. We develop a comprehensive range of ASTM A335 GR P9 Alloy Steel Seamless Pipes with superior grade materials.
Alloy Steel Grade P9 Seamless Pipes are manufactured by carving out the portion from the metal so that desired length is given to the pipe. Since the extrusion of metal is obtained, it does not have any joint in its cross-section throughout its length. In seamless pipes there are no joints or welding is seen and it is produced from solid round billets. The seamless pipes are finished to dimensional specifications from 1/8 inch to 26 inches. Seamless pipes are used in high-pressure applications because of the robust strength it offers. Applications include oil, gas exploration, hydraulic cylinders, bearings and boilers. Documentation of seamless pipes is provided which include the certificate of origin by the chamber of commerce and industry, fumigation certificates and raw material test reports.
ASTM A335 GR P9 Alloy Steel Seamless Pipes are carefully packed into bundles and plastic caps are placed at the end of pipes to ensure safe handling and transportation.
ASTM A335 P5 P9 P11 P22 P91 Alloy Steel Pipes Tubes Stockist
ASTM A335 P5 P9 P11 P22 P91 Alloy Steel Pipes Tubes Supplier
ASTM A335 P5 P9 P11 P22 P91 Alloy Steel Pipes manufacturing
ASTM A 335 GR P9 Heat Treatment Requirements
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P5, P9, P11, and P22 |
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Grade |
Heat Treatment Type |
Normalizing |
Subcritical Annealing
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P5 (b,c) |
Full or Isothermal Anneal |
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Normalize and Temper |
***** |
1250 [675] |
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Subcritical Anneal (P5c only) |
***** |
1325 - 1375 [715 - 745] |
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P9 |
Full or Isothermal Anneal |
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Normalize and Temper |
***** |
1250 [675] |
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P11 |
Full or Isothermal Anneal |
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Normalize and Temper |
***** |
1200 [650] |
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P22 |
Full or Isothermal Anneal |
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Normalize and Temper |
***** |
1250 [675] |
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P91 |
Normalize and Temper |
1900-1975 [1040 - 1080] |
1350-1470 [730 - 800] |
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Quench and Temper |
1900-1975 [1040 - 1080] |
1350-1470 [730 - 800] |
ASTM A 335 GR P9 Chemical Requirements
| Grade | P-5 | P-9 | P-11 | P-22 | P-91 | P-91 shall also include the following: | ||
| Element | UNS Designation | K41545 | S50400 | K11597 | K21590 | K91560 | ||
| Carbon | 0.15 max | 0.15 max | 0.05 - 0.15 | 0.05 - 0.15 | 0.08 - 0.12 | V at 0.18 - 0.25 | ||
| Manganese | 0.30 - 0.60 | 0.30 - 0.60 | 0.30 - 0.60 | 0.30 - 0.60 | 0.30 - 0.60 | N at 0.030 - 0.070 | ||
| Phosphorous, max | 0.025 | 0.025 | 0.025 | 0.025 | 0.020 | Ni at 0.40 max | ||
| Sulfur, max | 0.025 | 0.025 | 0.025 | 0.025 | 0.010 | Al at 0.02 max | ||
| Silicon | 0.50 max | 0.25 - 1.00 | 0.50 - 1.00 | 0.50 max | 0.20 -0.50 | Cb at 0.06 - 0.10 | ||
| Chromium | 4.00 - 6.00 | 8.00 - 10.00 | 1.00 - 1.50 | 1.90 - 2.60 | 8.00 - 9.50 | Ti at 0.01 max | ||
| Molybdenum | 0.45 -0.65 | 0.90 - 1.10 | 0.44 - 0.65 | 0.87 - 1.13 | 0.85 - 1.05 | Zr at 0.01 max | ||
ASTM A 335 GR P9 Tensile Requirements
| Seamless | ||||||
| P-5 | P-9 | P-11 | P-22 | P-91 | P91 shall not have a hardness not exceeding 250 HB/265 HV [25HRC]. | |
| Tensile Strength, min., psi | ||||||
| ksi | 60 | 60 | 60 | 60 | 85 | |
| MPa | 415 | 415 | 415 | 415 | 585 | |
| Yield Strength, min., psi | ||||||
| ksi | 30 | 30 | 30 | 30 | 60 | |
| MPa | 205 | 205 | 205 | 205 | 415 | |
ASTM A 335 GR P9 Permissible Variation in Wall Thickness
| NPS [DN] Designator | Tolerance, % from Specified | |
| Over | Under | |
| 1/8 to 2 1/2 [6 to 65] incl., all t/D ratios | 20.0% | 12.5% |
| Above 2 1/2 [65], t/D < or = 5% | 22.5% | 12.5% |
| Above 2 1/2 [65], t/D > 5% | 15.0% | 12.5% |
| (t = Specified Wall Thickness; D = Specified Outside Diameter) | ||