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Help CenterASME SA335 Seamless Alloy Steel Pipe – High Temperature Service Chrome-Moly (Cr-Mo) – Grades P11,P12, P22,
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ASME SA335 Seamless Alloy Steel Pipe – High Temperature Service
Chrome-Moly (Cr-Mo) – Grades P11,P12, P22
Product Overview
ASME SA335 seamless ferritic alloy steel pipe for high temperature service in power plants, refineries, and petrochemical facilities. Chrome-Moly (Cr-Mo) alloy provides oxidation resistance and creep strength.
Most Popular Grades: P11 (1.25Cr-0.5Mo), P22 (2.25Cr-1Mo), P91 (9Cr-1Mo-V – supercritical)
Size: 1/2″ – 24″ | Schedules: 10-160, XXS
✅ ASME SA335 / ASTM A335 – seamless chrome-moly alloy
✅ Chromium for oxidation resistance; Molybdenum for creep strength
✅ P91: ≥585 MPa tensile – advanced creep-resistant steel
✅ P22 standard for high pressure steam – most common
✅ P92: up to 620°C – ultra-supercritical grade
✅ 100% UT + hydrostatic tested
✅ EN 10204 3.1 MTC with heat number
Grade Selection – Chrome-Moly
| Grade | Cr % | Mo % | Max Temp | Application |
|---|---|---|---|---|
| P11 | 1.25 | 0.5 | 538°C | General high temp – most common |
| P22 | 2.25 | 1.0 | 565°C | High pressure steam mains |
| P91 | 9.0 | 1.0 | 593°C | Supercritical boilers |
| P92 | 9.0 | 0.5 | 620°C | Ultra-supercritical |
| P5 | 5.0 | 0.5 | 593°C | Refinery heaters |
| P9 | 9.0 | 1.0 | 593°C | Severe oxidation |
Mechanical Properties – Key Grades
| Grade | Tensile (MPa) | Yield (MPa) |
|---|---|---|
| P22 | ≥415 | ≥205 |
| P91 | ≥585 | ≥415 |
| P92 | ≥620 | ≥440 |
Common Stock Sizes – Power Plant P22/P91
| NPS (inch) | Schedule | Grade |
|---|---|---|
| 6″ | 80, 120 | P22, P91 |
| 8″ | 80, 120 | P22, P91 |
| 10″ | 80, 120 | P22, P91 – most common |
| 12″ | 80, 120 | P22, P91 – most common |
| 14″-18″ | 40, 60, 80 | P22 |
Contact
📧 Email: yjhtrade@gmail.com
📞 WhatsApp: +86 15106174543
🌐 Website:
Tags: ASME SA335 Chrome Moly Pipe P11 Pipe P22 Pipe P91 Pipe Alloy Steel Pipe Power Plant Pipe
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