Yuhong Group Co.,Ltd
| Ends | Plain End, Beveled End |
| Application | Boiler, Superheater, Heat-Exchanger |
| Specification | ASTM A335/ ASME SA335 |
| Payment Terms | L/C,T/T |
| Supply Ability | According to customer's request |
| Delivery Time | Depend on the quantity |
| Packaging Details | Bundle with plastic Cap / Ply Wooden Case |
| Type | Seamless |
| Surface | Bright Annealed, Pickled And Annealed, Polished |
| W.T. | MW/ AW |
| Material | P11 |
| Product Name | Seamless Alloy-Steel Pipe |
| Brand Name | YUHONG |
| Model Number | ASTM A335 P11(UNS K11597) |
| Certification | ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2015 |
| Place of Origin | China |
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Product Specification
| Ends | Plain End, Beveled End | Application | Boiler, Superheater, Heat-Exchanger |
| Specification | ASTM A335/ ASME SA335 | Payment Terms | L/C,T/T |
| Supply Ability | According to customer's request | Delivery Time | Depend on the quantity |
| Packaging Details | Bundle with plastic Cap / Ply Wooden Case | Type | Seamless |
| Surface | Bright Annealed, Pickled And Annealed, Polished | W.T. | MW/ AW |
| Material | P11 | Product Name | Seamless Alloy-Steel Pipe |
| Brand Name | YUHONG | Model Number | ASTM A335 P11(UNS K11597) |
| Certification | ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2015 | Place of Origin | China |
| High Light | ASTM A335 P11 seamless pipe ，ferritic alloy-steel high-temperature pipe ，seamless steel pipe with warranty | ||
ASTM A335 P11 Seamless Ferritic Alloy-Steel Pipe for High-Temperature Service
ASTM A335 P11 is a seamless ferritic alloy-steel pipe within the chromium-molybdenum (Cr-Mo) system, engineered for high-temperature/pressure service. Its microstructure consists of tempered bainite or ferrite-pearlite (depending on heat treatment), where the controlled alloying of Cr (1.00-1.50%) and Mo (0.44-0.65%) ensures superior creep resistance and rupture strength within the 540-593°C range. Manufactured via seamless hot-finished or cold-drawn processes, the pipe requires normalization and tempering to enhance grain boundary stability. It is certified for ASME B31.1/B31.3-regulated power piping and high-temperature refinery/petrochemical pipelines.
1.Chemical & Mechanical Properties
| ASTM A335 P11 Chemical Composition (%) | ||||||
| C | Mn | P | S | Si | Cr | Mo |
|
0.05%~0.15% |
0.3%~0.6% | ≤0.025% |
≤0.025% |
0.5%-1.00% |
1.00%~1.5% |
0.44%~0.65% |
Mechanical Properties
| Property | Standard Value |
|---|---|
| Tensile Strength | ≥415 MPa (60 ksi) |
| Yield Strength (0.2% offset) | ≥205 MPa (30 ksi) |
| Elongation | ≥20% |
| Hardness (Brinell) | ≤197 HBW |
2. Key Adventages
Maintains excellent creep resistance at 540-593°C, with 2-3 times longer service life than carbon steel (e.g. A106)
Maintains rupture strength >60MPa under 593°C/100,000h condition
1.25% Cr content forms dense Cr₂O₃ scale, reducing oxidation rate by 80% vs carbon steel
15-20% cost saving vs P22, most economical choice for <600°C service
Excellent high-temp stability extends maintenance intervals by 50% vs carbon steel
Standard PWHT(650-750°C) is sufficient, much simpler than high-alloy steels
Supports both hot bending(>950°C) and cold bending(annealing required)
Normalizing+Tempering creates stable ferrite+pearlite structure
Complies with both ASME BPV Code and ASTM A335 standards
3. Key Applications
Power Industry: Power plant boilers (superheaters, reheaters, main steam pipelines)
| Characteristic | ASTM A335 P11 | Carbon Steel (A106) | High-Alloy Steel (P91) |
|---|---|---|---|
| Max Service Temp | 593°C | 425°C | 700°C |
| High-Temp Strength | ★★★★☆ | ★★☆☆☆ | ★★★★★ |
| Cost Efficiency | ★★★★★ | ★★★★☆ | ★★★☆☆ |
| Fabrication Difficulty | ★★☆☆☆ | ★☆☆☆☆ | ★★★★☆ |
| Maintenance Interval | 3-5 years | 1-2 years | 5-8 years |
Company Details
Business Type:
Manufacturer,Distributor/Wholesaler,Importer,Exporter,Trading Company,Seller,Other
Year Established:
2007
Total Annual:
50M-70M
Employee Number:
50~850
Ecer Certification：
Verified Supplier
Yuhong Group is one of the large scale group company in China, more than 35 years experience in the international market, providing high-quality services to over 3000 customers, end user which like Aramco, Petrobras, Pemex, Petronas, Ecopetro, Petroecuador, …. till now Yuhong Grou... Yuhong Group is one of the large scale group company in China, more than 35 years experience in the international market, providing high-quality services to over 3000 customers, end user which like Aramco, Petrobras, Pemex, Petronas, Ecopetro, Petroecuador, …. till now Yuhong Grou...
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