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Specialist in ASTM A335 Grade P11 Alloy Steel Seamless Pipe

ASTM A335 Grade P11 Alloy Steel Seamless Pipe

Being one of the leading P11 Pipe suppliers in India, most of our clients belong to industries such as refineries, power plants, petrochemical plants, and oil field. P11 Seamless Pipe produced under the ASTM A335 specification is designed to be used for high temperature and high pressure applications. The chemistry of the ASTM A335 P11 Alloy Steel Pipe is the reason behind the alloy’s excellent performance in high temperature applications. Essentially, the addition of both chromium and molybdenum in the alloy of Alloy Steel A335 P11 improves the mechanical properties of this low alloy grade drastically.

ASTM A335 Grade P11 Alloy Steel Seamless Pipe

For instance, as a single, most effective additive in the alloy of P11 Steel Pipe Molybdenum is known to increase its high temperature creep strength. Also, apart from increasing the tensile strength properties of the ASTM A335 P11 Pipe, adding Molybdenum also favours welding. Just as molybdenum has a positive effect on the alloy, the addition of chromium also improves certain characteristics of the A335 P11 Material. For instance, the content of Chromium present in the A335 P11 Welded Pipe is what not only causes an increase in the hardness and tensile strength properties but also only minimally reduces elasticity. Apart from the length of the pipe being subjected to a hydrostatic test, the SA335 Grade P11 needs to conform to the tensile property, chemistry as well as the hardness requirements

ASTM A335 Grade P11 Pipes Specification List

Material Standard ASTM A335 P11, SA335 P11 (with IBR Test Certificate)
Size Range 1/2” NB to 36” NB
Thickness Range 3-12mm
Available Schedules SCH 80, SCH 40, SCH XS, SCH 160, SCH XXS, All Schedules
Types Seamless / Welded / ERW / Fabricated
Available in Form of Square, Round, Rectangular, Hydraulic Etc.
Lengths Standard
Double &
In Cut length also.
Additional Testing NACE TM0177, H2 SERVICE, NACE MR 0175, HIC TEST, NACE TM0284, SSC TEST, IBR, etc.
Application Seamless Ferritic Alloy Steel Pipe for High-Temperature Service

Additional Information

A335 P11 is often called as chrome moly pipe because of its chemical makeup of Molybdenum (Mo) and Chromium (Cr). Chromium raises the tensile, yield and hardness of ASME SA335 Pipe at room temperatures.

Wall Thickness & Sizes of P11 Steel Pipe

ASTM A335 P11 Pipe Types Out diameter Wall thickness Length
ASTM A335 P11 Seamless Pipe (Custom Sizes) 1/2" NB - 60" NB SCH 5 / SCH 10 / SCH 40 / SCH 80 / SCH 160 Custom
ASTM A335 P11 Welded Pipe (in Stock + Custom Sizes) 1/2" NB - 24" NB As per requirement Custom
ASTM A335 P11 ERW Pipe (Custom Sizes) 1/2" NB - 24" NB As per requirement Custom
ASTM A335 High Pressure P11 Boiler Pipe 16" NB - 100" NB As per requirement Custom

Chemical Compatibility of SA335 Gr P11 Pipe

Alloy Steel P11 Carbon Chromium Manganese Molybdenum Phosphorus Sulphur Silicon
0.05 – 0.15 1.00 – 1.50 0.30 – 0.60 0.44 – 0.65 0.025 max 0.025 max 0.50 – 1.00

Mechanical Analysis of ASTM A335 P11 Pipe

Tensile Strength, MPa Yield Strength, MPa Elongation
415 min 205 min 30 min

Material Equivalent of P11 Alloy Steel Seamless Pipe

ASTM ASME Equivalent Material UNS BS DIN ISO ABS LRS JIS G 3458 NK
A335 P11 SA335 P11 T11 K11597 3604 P1 621 - - ABS 11 - STPA 23 KSTPA 23
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