IMRI makeS seamless P91 alloy steel pipes from chrome-molybdenum-vanadium steel, which gives them exceptional high-temperature strength, oxidation resistance, and creep resistance. Engineers widely utilize these pipes in critical applications such as power boilers, petrochemical plants, and high-pressure piping systems where reliability under extreme conditions is essential.
- Alloy Seamless tube, Seamless Pipe
Grade P91 ASTM A335 Seamless Alloy Steel Pipe
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Product Detail
Chemical Component
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Quick Details
Product Name:
Grade P91 ASTM A335 Seamless Alloy Steel Pipe
Standard:
ASTM A335; ASTM A999
Grade:
P91
Thickness:
SCH 40-SCH 160
Section Shape:
Round
Outer Diameter:
73-1219mm
Place of Origin:
Baotou, China(Mainland)
Usage:
Power boilers, petrochemical plants
Surface Treatment:
Hot Rolled
Tolerance:
OD: NPS 1/2-NPS 12 ±0.5% or ±0.20mm NPS 12-NPS 24 ±0.75% or ±0.40mm >NPS 24 ±1.0% or ±0.80mm WT: +20% / -0%
End:
Plain, beveled, or customized
End Protector:
Plastic pipe caps,iron protector or customized
length:
6-12m or customized
Brand:
Baotou steel
Delivery Time:
Normally within 30-45 days and according to the quantity.
Chemical Component（ASTM A335）
| Grade | Type | C | Mn | Mo | Cr | Ni | Cu | P | S | Si | ||||
| Min | Max | Min | Max | Min | Max | Min | Max | Max | Max | Max | Max | Max | ||
| P91 | – | 0.08 | 0.12 | 0.30 | 0.60 | 0.85 | 1.05 | 8.00 | 9.50 | – | – | 0.020 | 0.010 | 0.50 |
Mechanical Performance（ASTM A335）
| Grade | Type | Total under load Elongation % | Yield Strength | Tensile Strength | Hardness | Specified OD
mm | Allowable hardness Variation | ||
| Min | Max | Min | HRC | HBW | HRC | ||||
| P91 | – | 20 | 415 | – | 585 | – | – | – | – |
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