ASTM A335/ASME SA335
P92 Seamless Ferritic Alloy-Steel Pipe
ASTM A335/ASME SA335 P92 Seamless Ferritic Alloy-Steel Pipe
Short Description:
ASTM A335 P92 Seamless Ferritic Alloy-Steel Pipe may be either hot finished or cold drawn with the finishing treatment.
ASTM A335 P92 Seamless Ferritic Alloy-Steel Pipe for High-Temperature Service
P92 Steel
A335 P92 alloy tube, P92 material is American steel number ASTM A335 P92, which is martensitic heat-resistant steel.
P92 steel is based on P91 steel, and the content of Mo element is appropriately reduced. At the same time, a certain amount of W is added to increase the molybdenum equivalent (Mo + 0.5W) of the material from 1% of P91 steel to about 1.5%. The steel is also added with a small amount of boron. After the above alloying improvement, compared with other commonly used heat-resistant steels of 9% Cr series, its high temperature corrosion resistance and oxidation resistance are similar, but the high temperature strength and creep performance are greatly improved. Improvement.
Compared with P91 steel, P92 steel has a 30% higher endurance strength at 600 ℃. In order to improve the thermal efficiency of modern coal-fired generating units, the generating units must be operated at higher temperature and pressure parameters, and a large number of P92 seamless steel pipes are required.
ASTM A335 P92 Seamless Ferritic Alloy-Steel Pipe Quick Details
Manufacture:Seamless process ,Hot-finished or Cold-finished
Wall thickness(WT): 2.1mm——35 mm.
Outer diameter (OD): 23 mm——509mm
Common specifications:25mm*7mm, 141.3mm*6.55mm, 323.9mm*25.4mm,
Length: 6M or specified length as required.
Ends: Plain End, Beveled End, Threaded
Additional Info
Port of Shipment: Tianjin, China
Payment Terms:T/T, LC
Delivery: 7-15 days after payment
Surface: Tubes will be varnished (Outside only) to prevent rust.
Marking: Standard + Steel Grade + Size + Heat No + Lot No
Package: Bundles (hexagonal), Wooden Boxes, Crates (steel/wooden) or as required
Manufacture
ASTM A335 P92 Seamless Ferritic Alloy-Steel Pipe may be either hot finished or cold drawn with the finishing treatment.
ASTM A335 P92 Seamless Alloy Steel Pipe Chemical Composition(%)
| Grade | C | Mn | P | S | Si | Cr | Mo |
| A335 P92 | 0.07-0.13 | 0.3-0.6 | ≤0.02 | ≤0.01 | ≤0.5 | 8.5-9.5 | 00.3-0.6 |
| V | N | Ni | Al | Nb | W | B | |
| 0.15-0.25 | 0.03-0.07 | ≤0.4 | ≤0.04 | 0.04-0.09 | 1.5-2.0 | 0.001-0.006 |
ASTM A335 P92 Seamless Alloy Steel Pipe Mechanical & Physical Properties
| Tensile Strength(MPa) | Yield Strength(MPa) | Elongation(%) |
| ≥620 | ≥440 | ≥20 |
Size Tolerances of ASTM A335 P92 Alloy Steel Pipe
Tolerance Of Outside Diameter
| ASTM A450 | Hot rolled | Outside Diameter(mm) | Tolerance(mm) |
| OD≤101.6 | +0.4 / -0.8 | ||
| 101.6＜OD≤190.5 | +0.4 / -1.2 | ||
| 190.5＜OD≤228.6 | +0.4 / -1.6 | ||
| Cold Drawn | OD＜25.4 | ±0.10 | |
| 25.4≤OD≤38.1 | ±0.15 | ||
| 38.1＜OD＜50.8 | ±0.20 | ||
| 50.8≤OD＜63.5 | ±0.25 | ||
| 63.5≤OD＜76.2 | ±0.30 | ||
| 76.2≤OD≤101.6 | ±0.38 | ||
| 101.6＜OD≤190.5 | +0.38 / -0.64 | ||
| 190.5＜OD≤228.6 | +0.38 / -1.14 | ||
| ASTM A530,ASTM A335 | NPS | Outside Diameter(inch) | Tolerance(mm) |
| 1/8≤OD≤1-1/2 | ±0.40 | ||
| 1-1/2＜OD≤4 | ±0.79 | ||
| 4＜OD≤8 | +1.59 / -0.79 | ||
| 8＜OD≤12 | +2.38 / -0.79 | ||
| 12＜OD | ±1% |
Tolerance Of Wall Thickness
| ASTM A450 | Hot rolled | Outside Diameter(mm) | Tolerance(%) |
| OD≤101.6,WT≤2.4 | +40 / -0 | ||
| OD≤101.6,2.4＜WT≤3.8 | +35 / -0 | ||
| OD≤101.6,3.8＜WT≤4.6 | +33 / -0 | ||
| OD≤101.6,4.6＜WT | +28 / -0 | ||
| 101.6＜OD,2.4＜WT≤3.8 | +35 / -0 | ||
| 101.6＜OD,3.8＜WT≤4.6 | +33 / -0 | ||
| 101.6＜OD,4.6＜WT | +28 / -0 | ||
| Cold Drawn | OD≤38.1 | +20 / -0 | |
| OD＞38.1 | +22 / -0 | ||
| ASTM A530 | NPS | Outside Diameter(inch) | Tolerance(%) |
| 1/8≤OD≤2-1/2 | +22 / -12.5 | ||
| 3≤OD≤18,WT/OD≤5% | +22.5 / -12.5 | ||
| 3≤OD≤18,WT/OD＞5% | +15 / -12.5 | ||
| 20≤OD,WT/OD≤5% | +22.5 / -12.5 | ||
| 20≤OD,WT/OD＞5% | +15 / -12.5 |
Tests Required
Hydrostatic Test
Transverse or Longitudinal Tension Test and Flatten- ing Test, Hardness Test, or Bend Test
Heat Treatment:
ASTM A335 P92 Seamless Ferritic Alloy-Steel Pipe shall be normalized at 1900°F [1040°C] minimum and tempered at 1350°F [730°C] minimum as a final heat treatment.
Application of ASTM A335 P92 Seamless Ferritic Alloy-Steel Pipe
A335 P92 Seamless Ferritic Alloy-Steel Pipes are widely used in high-temperature components such as main steam pipelines, reheater pipes and headers of ultra-supercritical thermal power generating units;
The use of A335 P92 Seamless Ferritic Alloy-Steel Pipes greatly reduces the wall thickness and structural weight of the pipeline, and improves the flexibility and effectiveness of the generator set.