| 标准： | ASTM A335 | 长度 | 单随机，双随机和切割长度。 |
|---|---|---|---|
| OD： | 1/2′ 至 24 | 末端类型： | Plain/Bevel |
| 强光 | Oil Gas Alloy Steel， High Temperature Alloy Steel Seamless Tubes， Alloy Steel Seamless Round Tube | ||
ASTM A335 / ASME SA335 P9 SEAMLESS ALLOY STEEL SMLS PIPE
ASTM A335 / ASME SA335 Pipe named chrome moly pipe as they have a high level of Chromium and Molybdenum.
Chromium will increase oxidation resistance and provides high-temperature strength， along with the better tensile & yield strength and proper hardness at room temperature. When the chromium levels are above 12%， it can be classified as stainless steel.
Molybdenum increases the overall strength， resistance， elasticity， hardenability and overall quality， moly ensures that the material is more resistant to softening， restrains the growth of grains and lessens the chances of embrittlement. It is the single additive that is responsible for the increase in high temperature resistance (to 540-750°C) and it also improves the corrosion resistance to steel.
Key to the composition of chrome moly alloy P9 is the addition of chromium and molybdenum. Chromium， or chrome， improves high-temperature strength， increases oxidation resistance and raises the tensile， yield and hardness at room temperatures. Molybdenum increases the strength， elastic limit， resistance to wear， impact qualities and hardenability. It increases the resistance to softening， restrains grain growth and makes chromium steel less susceptible to embrittlement. Moly is also the most effective additive for increasing high temperature creep strength， or creep resistance. It also enhances the corrosion resistance of steel and inhibits pitting.
众所周知，这两种元素都能提高钢管的耐磨性、抗冲击性、淬透性和弹性极限。它们还能提高管材的机械性能，例如：防止晶粒长大、降低脆性、提高高温蠕变强度并具有出色的抗软化能力。
a335 p9 管材中的铬含量使其具有很强的耐腐蚀性。因此，a335 p9 在高温下具有出色的抗氧化性。除铬外，外涂黑油漆或防锈油的 astm a335 p9 合金钢管也具有良好的耐腐蚀性。也可以进行镀锌处理。镀锌可增强其抗大气腐蚀的能力。
A335 P9 管材可通过热加工或冷拔成型制造。成型后，钢管必须进行热处理，包括完全退火或等温退火、正火和回火。SA335 P9 级钢管分为四种类型：焊接钢管、加工钢管、无缝钢管和 ERW 钢管。 管道有螺纹端、普通端和斜面端可供选择。这些管材的两端都有塑料盖保护。asme sa335 grade p9 管材和钢管有多种制造形式，如矩形、盘管、圆形、方形、液压管、U 形管和薄饼盘管。
ALLOY PIPE CROSS REFERENCE TABLE ASTM vs. EN GRADES
| 铬钼管：Werkstoff vs EN vs ASTM | ||
|---|---|---|
| Werkstoff /DIN | EN | 美国材料与试验协会 |
| 1.5415 | 16Mo3 | A335 P1 级 |
| 1.7335 | 13CrMo4-5 | A335 等级 P11，P12 |
| 1.7380 | 10CrMo9-10 | A335 等级 P22 |
| 1.7362 | X11CrMo5 | A335 P5 级 |
| A335 等级 P9 | ||
| 1.4903 | X10CrMoVNb9-1 | A335 等级 P91 |
化学成分（%）：
| 等级 | C | 锰 | P≤ | S≤ | Si | Cr | 莫 |
| P11 | 0.05-0.15 | 0.30-0.60 | 0.025 | 0.025 | 0.50-1.00 | 1.00-1.50 | 0.44-0.65 |
| P22 | 0.05-0.16 | 0.30-0.60 | 0.025 | 0.025 | ≤0.50 | 1.90-2.60 | 0.87-1.13 |
| P5 | ≤0.15 | 0.30-0.60 | 0.025 | 0.025 | ≤0.50 | 4.00-6.00 | 0.45-0.65 |
| P9 | ≤0.15 | 0.30-0.60 | 0.025 | 0.025 | 0.25-1.00 | 8.00-10.00 | 0.90-1.10 |
| P91 | 0.08-0.12 | 0.30-0.60 | 0.020/0.010 | 0.020/0.010 | 0.02-0.50 | 8.00-9.50 | 0.85-1.05 |
| P92 | 0.07-0.13 | 0.30-0.60 | 0.020/0.010 | 0.020/0.010 | ≤0.50 | 8.50-9.50 | 0.30-0.60 |
机械性能
| 等级 | 拉伸强度 | 屈服强度 | 伸长率 |
| P11，P22，P5，P9 | ≥415 | ≥205 | ≥30/20 |
| P91 | ≥585 | ≥415 | ≥20 |
| P92 | ≥620 | ≥440 | ≥20 |
申请：
A335/SA335 Seamless P9 pipe is often used in the oil and natural gas industry due to its high strength. P9’s great performance properties make it suitable for energy-related applications. P5 is suitable for:
- 炼油厂
- 机械制造
- 石油和天然气
- 发电
- 石油化工
- 气体处理
- 肥料
- 糖
