Gnee (Tianjin) Multinational Trade Co., Ltd.
Gnee (Tianjin) Multinational Trade Co., Ltd.
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ASTM A335 Seamless Ferritic Alloy Steel Pipe For High Temperature P5/P9/P11/P12/P22/P91 Seamless Steel Pipe
ASTM A335 Pipe (ASME S/A335, Chorme-Moly) is a seamless ferritic Alloy-Steel Pipe for high temperature service. Pipe ordered to this specification shall be suitable for bending, flanging (vanstoning), and similar forming operations, and for fusion welding. Sometimes referred to as "P Grade”, chome moly pipe is popular in P-Grades P5, P9, P11, P22, and P91. The most common use of grades P11, P22, and P91 is in the power industry and petro-chemical plants, Grades P5 and P9 are commonly used in refineries.
Chemical Requirements of A335 Alloy Steel Seamless Pipes
| 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 | |
Tensile Requirements of A335 Alloy Steel Seamless Pipes
| Seamless | |||||
| 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 |
| P91 shall not have a hardness not exceeding 250 HB/265 HV [25HRC]. | |||||
FAQ
Q: Are you a factory or trading company ?
A: We're a factory founded in 2015, with covered area 40,000 suqare meters.
Q: How long is your delivery time?
A: depends on your quantity, in general around (30-45) days
Q: What is your payment term?
A: 30% T/T in advance, balance before shipping, L/C at sight
Q: How do you insure the quality?
A: We've a strict requirement on every process of manufacturing for the purpose of producing better products.
We supply the tube with MTC, 100% Eddy current test, 100% Ultrasonic test
Q: Do you supply samples ? Is it free or extra ??
A: Yes , We can provide free samples charge , but the freight cost should pay the client