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Alloy Pipe ASTM A335 P5, P9, P11, P22, P91
Alloy steel pipes are used in the energy industry for high temperature and very low-temperature service (cryogenic), or for applications with very high pressures.
ASTM A335 alloy steel pipes fit ASTM A234 WPx series buttweld fittings (WP5, WP9, WP91) and A182 Fx forged fittings and flanges (A182 F5, F9, F11, F22, F91). All these materials have similar chemical and mechanical properties and can be joined or welded.
Size range: O.D.:6-420mm W.T.:1-50mm L: according to customer requirement Alloy steel seamless ASTM A335 P1 boiler pipe
| Steel Grade and Chemical Compositions: | |||||||
| Steel Grade | C | Mn | P | S | Si | Cr | Mo |
| max | max | max | max | max | min | ||
| P1 | 0.10-0.20 | 0.30-0.80 | 0.025 | 0.025 | 0.10-0.50 | - | 0.44-0.65 |
| P9 | 0.15 | 0.30-0.60 | 0.025 | 0.025 | 0.25-1.00 | 8.00-10.00 | 0.90-1.10 |
| P11 | 0.05-0.15 | 0.30-0.60 | 0.025 | 0.025 | 0.50-1.00 | 1.00-1.50 | 0.44-0.65 |
| P12 | 0.05-0.15 | 0.30-0.61 | 0.025 | 0.025 | 0.50 | 0.80-1.25 | 0.44-0.65 |
| P21 | 0.05-0.15 | 0.30-0.60 | 0.025 | 0.025 | 0.50 | 2.65-3.35 | 0.80-1.06 |
| P22 | 0.05-0.15 | 0.30-0.60 | 0.025 | 0.025 | 0.50 | 1.90-2.60 | 0.87-1.13 |
| P91 | 0.08-0.12 | 0.30-0.60 | 0.020 | 0.010 | 0.20-0.50 | 8.00-9.50 | 0.85-1.05 |
| P92 | 0.07-0.13 | 0.30-0.60 | 0.020 | 0.010 | 0.50 | 8.50-9.50 | 0.30-0.60 |
| Steel Grade | Tensile Strength | Yield Strength | Elongation | Hardness.Max | ||
| min.ksi [Mpa] | min.ksi [Mpa] | % | Brinell/Vickers | Rockwell | ||
| P1, P2 | 55[380] | 30[205] | 20 | |||
| P12 | 60[415] | 32[220] | 20 | |||
| P23 | 74[510] | 58[400] | 20 | |||
| P91 | 85[585] | 60[415] | 30 | 250 HB/265 HV | 25 HRC | |
| P92, P911 | 90[620] | 64[440] | 30 | 250 HB/265 HV | 25 HRC | |
| P122 | 90[620] | 58[400] | 30 | 250 HB/265 HV | 25 HRC | |
Alloy Pipe ASTM A335 Photos
