ASTM A335 P91 Seamless Welded Steel Pipe
ASTM A335 P91 Specification
| Specialized in | Large Diameter Size |
| Outer Dimensions | 19.05mm – 114.3mm |
| Wall Thickness | 2.0mm – 14 mm |
| Length | max 16000mm |
| Schedule | Schedule 20 - Schedule XXS (heavier on request) up to 250 mm thk. |
| Form | Round, Square, Rectangular, Hydraulic Etc. |
| Standard | ASTM A335 P91, SA335 P91 (with IBR Test Certificate) |
| Size | 1/2 NB to 36 NB |
| Thickness | 3-12mm |
| Schedule | SCH 40, SCH 80, SCH 160, SCH XS, SCH XXS, All Schedules |
| Tolerance | Cold drawn pipe: +/-0.1mm Cold rolled pipe: +/-0.05mm |
| Craft | Cold rolled and Cold drawn |
| Type | Seamless / ERW / Welded / Fabricated |
| Length | Single Random, Double Random & Cut Length. |
| End | Plain End, Beveled End, Treaded |
| Specialized in | Large Diameter SA335 P91 Material |
| Additional Testing | NACE MR 0175, NACE TM0177, NACE TM0284, HIC TEST, SSC TEST, H2 SERVICE, IBR, etc. |
| Application | Seamless Ferritic Alloy-Steel Pipe for High-Temperature Service |
ASTM A335 P91 Chemical Composition
| C, % | Mn, % | P, % | S, % | Si, % | Cr, % | Mo, % | V, % | N, % | Ni, % | Al, % | Nb, % |
| 0.08-0.12 | 0.3-0.6 | 0.02 max | 0.01 max | 0.2-0.5 | 8.0-9.5 | 0.85-1.05 | 0.18-0.25 | 0.03-0.07 | 0.4 max | 0.04 max | 0.06-0.10 |
A335 P91 Material Composition and Astm A335 Gr P91 Composition is given in above table
ASTM A335 P91 Properties
| Tensile Strength , MPa | Yield Strength, MPa | Elongation, % | Hardness, HB |
| 585 min | 415 min | 20 min | 250 max |
ASTM A335 Gr P91 Equivalent Material
SA335 P91 Pipe equivalent
| ASTM | ASME | Equivalent material | JIS G 3458 | UNS |
|---|---|---|---|---|
| A335 P91 | SA335 P91 | T91, K90901, X10CrMoVNb9-1, 1.4903 | K91560 |
Equivalent Standards: EN 10216-2, ASTM A213, ASME SA213, GOST 550-75, NBR 5603
ASTM A335 P91 Alloy Steel Seamless Pipes Heat Treatment Requirements
| P5, P9, P11, and P22 | |||
| Grade | Heat Treatment Type | Normalizing Temperature Range F [C] | Subcritical Annealing or Tempering Temperature Range F [C] |
| ASTM A335 P5 (b,c) Pipe | Full or Isothermal Anneal | ||
| Normalize and Temper | ***** | 1250 [675] | |
| Subcritical Anneal (P5c only) | ***** | 1325 - 1375 [715 - 745] | |
| ASTM A335 P9 Pipe | Full or Isothermal Anneal | ||
| Normalize and Temper | ***** | 1250 [675] | |
| ASTM A335 P11 Pipe | Full or Isothermal Anneal | ||
| Normalize and Temper | ***** | 1200 [650] | |
| ASTM A335 P22 Pipe | Full or Isothermal Anneal | ||
| Normalize and Temper | ***** | 1250 [675] | |
| ASTM A335 P91 Pipe | Normalize and Temper | 1900-1975 [1040 - 1080] | 1350-1470 [730 - 800] |
| Quench and Temper | 1900-1975 [1040 - 1080] | 1350-1470 [730 - 800] |
A335 P91 Pipe Tensile Requirements
| Seamless | |||||
| P-5 | P-9 | P-11 | P-22 | P-91 | |
| Tensile Strength, min., psi | |||||
| ksi | 60 | 60 | 60 | 60 | 85 |
| MPa | 415 | 415 | 415 | 415 | 585 |
| Yield Strength, min., psi | |||||
| ksi | 30 | 30 | 30 | 30 | 60 |
| MPa | 205 | 205 | 205 | 205 | 415 |
More grades we can supply.
ASTM/ASME A/SA213 Gr. T2, T11, T12, T22, T91, T92
ASTM/ASME A/SA335 Gr. P1, P2, P5, P11, P12, P22
ASTM/ASME A/SA209 T1, T1a, T1b
