ASTM A335 Alloy Steel Pipe
gnee supply ASTM A335 chrome molybdenum alloy steel seamless tubes after multiple testing quality assurance, sizes from 1/2" to 24", wall thicknesses from SCH20 to XXS and even thicker.
Because A335 chromium-molybdenum pipe contains high content of chromium and molybdenum, molybdenum can improve the overall strength, resistance, elasticity, hardenability and overall quality. At the same time, molybdenum can ensure that A335 seamless steel pipe is more resistant to softening, inhibit grain growth, and reduce brittleness. Therefore, A335 seamless alloy pipe has excellent high temperature resistance and corrosion resistance.
A335 pipes (P9, P11,P22,P91 grade pipes) have been widely used in high temperature and high pressure services in different industries. According to market data, A335 high-temperature pipes are one of the most consumed alloy pipes in the boiler industry, heat exchangers, power stations, and high-pressure and ultra-high-pressure vessels.
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A335 alloy Steel Pipe Specifications:
Name: ASTM A335 alloy steel pipe
Diameter:16-1016mm
Thickness: 2---120mm
Steel grade: P1 P2 P5 P9 P11 P12 P22
Surface: oiled, black painted to prevent rust
Packaging:Loose / Bundle / Wooden Pallet / Wooden box-a / Plastic Cloth Wraps / Plastic End Caps / Beveled Protector
Transportation:By Road - Truck / Train, By Sea - Break-bulk Conventional Vessel / FCL (Full Container Load)
A335 Alloy Steel Seamless Pipe 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 | |
A335 Steel Seamless Pipes Tensile Requirements
| P-5 | P-9 | P-11 | P-22 | P-91 | |
| 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 |
A335 Cold drawn alloy steel pipe Heat Treatment Requirements
| P5, P9, P11, and P22 | |||
| Grade | Heat Treatment Type | Normalizing Temperature Range F [C] | Subcritical Annealing or Tempering Temperature Range F [C] |
| P5 (b,c) | Full or Isothermal Anneal, or | ||
| Normalize and Temper | ***** | 1250 [675] | |
| Subcritical Anneal (P5c only) | ***** | 1325 – 1375 [715 – 745] | |
| P9 | Full or Isothermal Anneal, or | ||
| Normalize and Temper | ***** | 1250 [675] | |
| P11 | Full or Isothermal Anneal, or | ||
| Normalize and Temper | ***** | 1200 [650] | |
| P22 | Full or Isothermal Anneal, or | ||
| Normalize and Temper | ***** | 1250 [675] | |
| P91 (type 1 and 2) | Normalize and Temper, or | 1900-1975 [1040 – 1080] | 1350-1470 [730 – 800] |
| Quench and Temper | 1900-1975 [1040 – 1080] | 1350-1470 [730 – 800] |
A335 alloy steel seamless tubes Elongation Requirements
| Wall Thickness | P5, P9, P11, P22 | P91 | ||
| in. | mm | Longitudinal | Transverse | Longitudinal |
| 5/16 (0.312) | 8 | 30 | 20 | 20 |
| 9/32 (0.281) | 7.2 | 28 | 19 | 19 |
| 1/4 (0.250) | 6.4 | 27 | 18 | 18 |
| 7/32 (0.219) | 5.6 | 26 | 17 | |
| 3/16 (0.188) | 4.8 | 24 | 16 | |
| 5/32 (0.156) | 4 | 22 | 15 | |
| 7/8 (0.125) | 3.2 | 21 | 14 | |
| 3/32 (0.094) | 2.4 | 20 | 13 | |
| 1/18 (0.062) | 1.6 | 18 | 12 | |
A335 carbon alloy pipe
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FAQ
Q: What is the equipment of your factory?
Answer: Our factory has advanced processing and testing equipment, such as hot-rolled product production lines, cold-rolled seamless steel pipe production equipment, cold-rolled coil production equipment, customized steel cutting equipment, ultrasonic testing systems, element analyzers, and coating thickness measurement Instruments, etc., make our products of higher quality and production efficiency higher.
Q: How do you ensure the quality of your products?
A: All products must undergo three inspections during the entire manufacturing process, including production, cutting and packaging. Factory inspection report is provided with the goods. If necessary, third-party inspection such as SGS can be accepted.
Q: How can I trust you?
A: We believe that honesty is the life of our company. We welcome you to visit our factory in Henan, China, and inspect our company, factory and products through video, live broadcast, etc.
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