| 产品名称 | 合金钢 | 标准： | 美国材料试验协会 A335 / 美国机械工程师学会 SA335 |
|---|---|---|---|
| 材料 | Gr. P5， P9， P11， P12， P21， P22 ， P91 | O.D.： | 1/2′ 至 24 |
| 长度 | 单随机，双随机和剪切长度 | 结束： | 平端，斜端 |
| 类型 | 无缝 | 包装 | 胶合木箱/铁箱/带塑料盖的捆绑箱 |
| 申请： | Power Industry， Petrochemical Plants， Boiler Tube， Oil & Gas Application | ||
| 强光 | T92 Alloy Steel Seamless Tubes， T91 Alloy Steel Seamless Tubes， ASME SA213M-2013 Boiler Tube | ||
ASTM A335 / ASME SA335 P91 Alloy Steel for High-Temperature Service
ASTM A335/SA335 P91 is a ferritic alloy steel that has very high strength properties， which do not deteriorate with time， and are creep resistant. It is also called 9 Cr 1 Mo steel， or chrome moly pipe， based on its composition. Alloy P91 pipe is primarily composed of chromium (Cr)， molybdenum (Mo)， and vanadium (V) as key alloying elements. The specific composition of P91 typically includes around 9% chromium and 1% molybdenum， in addition to other elements like carbon， manganese， silicon， and nitrogen. Other alloy grades may have different compositions tailored for specific applications.
Main Materials
ASTM A335（用于高温环境的无缝铁素体合金钢管）
ASTM A335 P1， P2， P5， P9， P12， P11， P22， P91
ASTM 213（无缝铁素体和奥氏体合金钢锅炉、过热器和换热管）
ASTM A213 T1， T2， T11， T5， T9， T22， T23， T91， T92
A335 Grade P91 Pipe Equivalent Material
| 美国材料与试验协会 | ASME | 等效材料 |
|---|---|---|
| A335 P 91 | ASME SA 335 P91 | 1.4903， K90901， X10CrMoVNb9-1 |
A335 Grade P91 Pipe Equivalent Material Chemical Requirements
| 要素 | 等级 | P-5 | P-9 | P-11 | P-22 | P-91 | P-91 还应包括以下内容 |
|---|---|---|---|---|---|---|---|
| UNS 名称 | K41545 | S50400 | K11597 | K21590 | K91560 | ||
| 碳 | 0.15 最大值 | 0.15 最大值 | 0.05 – 0.15 | 0.05 – 0.15 | 0.08 – 0.12 | V at 0.18 – 0.25 | |
| 锰 | 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 | |
| 磷，最大值 | 0.025 | 0.025 | 0.025 | 0.025 | 0.020 | 镍的最大值为 0.40 | |
| 硫，最大值 | 0.025 | 0.025 | 0.025 | 0.025 | 0.010 | 最大值为 0.02 的铝 | |
| 硅 | 最大 0.50 | 0.25 – 1.00 | 0.50 – 1.00 | 最大 0.50 | 0.20 -0.50 | Cb at 0.06 – 0.10 | |
| 铬 | 4.00 – 6.00 | 8.00 – 10.00 | 1.00 – 1.50 | 1.90 – 2.60 | 8.00 – 9.50 | 钛的最大值为 0.01 | |
| 钼 | 0.45 -0.65 | 0.90 - 1.10 | 0.44 – 0.65 | 0.87 – 1.13 | 0.85 – 1.05 | 最大 0.01 的锆 | |
| 机械性能 | ||||||
| 等级 | Tensile strength(MPa) | Yield strength(MPa) | 伸长率（%） | Impact energy(J) | 硬度 | |
| P11 | ≥ 415 | ≥ 205 | ≥ 22 | ≥ 35 | ≤ 163HB | |
| P12 | ≥ 415 | ≥ 220 | ≥ 22 | ≥ 35 | ≤ 163HB | |
| P22 | ≥ 415 | ≥ 205 | ≥ 22 | ≥ 35 | ≤ 163HB | |
| P5 | ≥ 415 | ≥ 205 | ≥ 22 | ≥ 35 | ≤ 187HB | |
| P91 | 585~760 | ≥ 415 | ≥ 20 | ≥ 35 | ≤ 250HB | |
| P92 | ≥ 620 | ≥ 440 | ≥ 20 | ≥ 35 | 250HB | |
The difference between alloy P91 pipe and other alloy grades commonly used in the industry:
Alloy Composition: Alloy P91 pipe is primarily composed of chromium (Cr)， molybdenum (Mo)， and vanadium (V) as key alloying elements. The specific composition of P91 typically includes around 9% chromium and 1% molybdenum， in addition to other elements like carbon， manganese， silicon， and nitrogen. Other alloy grades may have different compositions tailored for specific applications.
High-Temperature Strength: One of the main differentiating factors of P91 is its exceptional strength at elevated temperatures. It offers superior creep strength and resistance to thermal fatigue compared to many other alloy grades. This makes it suitable for high-temperature applications in power plants， boilers， and petrochemical industries.
Carbon Content: P91 has a higher carbon content compared to some other alloy grades， which contributes to its increased strength and hardness. However， this higher carbon content also leads to challenges during welding， requiring precise control of heat input and post-weld heat treatment.
Fabrication and Weldability: Alloy P91 has specific requirements when it comes to fabrication and welding. It necessitates precise preheating， interpass temperature control， and post-weld heat treatment to avoid detrimental effects on the material's microstructure and properties. Other alloy grades may have different welding procedures and considerations.
应用
A335/SA335 P91 is suitable for bending， flanging (vanstoning)， and similar forming operations and for fusion welding. Its commonly used in below usages.
发电
石油和天然气工业
化学加工
工业锅炉
热交换器
