ASTM A335 P9/ ASME SA335 P9 is a seamless ferritic chromium-molybdenum alloy pipe for high temperature service. The material composition of A335 P9 alloy steel pipe is silicon (max) 0.50, molybdenum 0.45 – 0.65, carbon (max) 0.15, chromium 4.00 – 6.00 and manganese 0.30 – 0.60. The mechanical properties of A335 P9 pipe are a minimum yield strength of 205 Mpa, a minimum tensile strength of 415 Mpa, and a minimum elongation of 30/20 L/T.
| Standard and Grades |
ASTM A335 / ASME SA335 Grade P9, P5, P1, P11, P22, P91 |
| Material types |
Chrome Moly Alloy |
| Manufacturing types |
Seamless hot rolled |
| Sizes |
1/2” to 24” |
| Wall thickness |
SCH 40, SCH STD, SCH 80, SCH XS, SCH 160 |
| Length |
6 meters, 12 meters or customized. |
| Surface treatment |
Polished, Varnished, 3LPE, FBE |
| Ends |
PE (Plain End), BE (Beveled Ends) |
ASTM A335 Gr P9 Composition
| C, % |
Mn, % |
P, % |
S, % |
Si, % |
Cr, % |
Mo, % |
| 0.015 max |
0.30-0.60 |
0.025 max |
0.025 max |
0.50 max |
4.00-6.00 |
0.45-0.65 |
ASTM A335 P9 Properties
| Tensile Strength, MPa |
Yield Strength, MPa |
Elongation, % |
| 415 min |
205 min |
30 min |
