This news page covers alloy steel pipe. The content highlights standards such as ASTM A335 and size and dimension requirements, end-use applications. Buyers can use the page to check whether the product, grade, size range, inspection requirements and delivery details match their inquiry.
Alloy Steel Pipe A335 GR. P5, P9, P11, P22, P91
ASTM A335 is a specification for seamless ferritic alloy-steel pipe for high-temperature service. It covers multiple grades of chrome-molybdenum alloy steel pipes that are intended for use in high-temperature applications such as power plants, refineries, and petrochemical plants.
The specification includes a range of nominal wall thicknesses and schedules, as well as options for different types of heat treatment. It also specifies various mechanical properties such as tensile strength, yield strength, and elongation.
ASTM A335 alloy steel pipes have excellent high-temperature strength and resistance to corrosion and oxidation. They are used in a wide range of applications where high temperatures and pressures are involved, and where reliability and durability are essential.
In summary, ASTM A335 is a critical specification for high-temperature alloy steel pipe that ensures high-quality and reliable performance in demanding applications.
ASTM A335 Steel Pipe Chemical Composition:
Material | C | Si | Mn | P | S | Mo | Cr |
% | % | % | % | Max | % | Max | |
A335 Grade P1 | 0.10---0.20 | 0.10---0.50 | 0.30---0.80 | 0.025 | 0.025 | 0.440.65 | |
A335 Grade P5 | Max 0.15 | Max 0.50 | 0.30---0.60 | 0.025 | 0.025 | 0.450.65 | 4.006.00 |
A335 Grade P11 | 0.05---0.15 | 0.5---1.0 | 0.30---0.60 | 0.025 | 0.025 | 0.450.65 | 1.001.50 |
A335 Grade P12 | 0.05---0.15 | Max 0.50 | 0.30---0.61 | 0.025 | 0.025 | 0.450.65 | 0.801.25 |
A335 Grade P22 | 0.05---0.15 | Max 0.50 | 0.30---0.60 | 0.025 | 0.025 | 0.871.13 | 1.902.60 |
ASTM A335 Steel Pipe Mechanical Properties:
Material | Tensile N/mm2 | Strength min N/mm2 | Yield %min |
A335 Grade P1 | Min380 | 205 | 30 |
A335 Grade P5 | Min415 | 205 | 30 |
A335 Grade P11 | Min415 | 205 | 30 |
A335 Grade P12 | Min415 | 205 | 30 |
A335 Grade P22 | Min415 | 205 | 30 |
ASTM A335 steel pipe Permissible Variation in Wall Thickness
NPS [DN] Designator | Tolerance, % from Specified | |
Over | Under | |
1/8 to 2 1/2 [6 to 65] incl., all t/D ratios | 20.0% | 12.5% |
Above 2 1/2 [65], t/D < or = 5% | 22.5% | 12.5% |
Above 2 1/2 [65], t/D > 5% | 15.0% | 12.5% |
(t = Specified Wall Thickness; D = Specified Outside Diameter) | ||
ASTM A335 Steel Pipe Permissible Variations in Outside Diameter:
Outside Diameter at any point shall not vary from standard specified more than:
NPS [DN] Designator | Over | Under | ||
in. | mm | in. | mm | |
1/8 to 1 1/2 [6 to 40], incl. | 1/64 (0.015) | 0.40 | 1/64 (0.015) | 0.40 |
Over 1 1/2 to 4 [40 to 100], incl. | 1/32 (0.031) | 0.79 | 1/32 (0.031) | 0.79 |
Over 4 to 8 [100 to 200], incl. | 1/16 (0.062) | 1.59 | 1/32 (0.031) | 0.79 |
Over 8 to 12 [200 to 300], incl. | 3/32 (0.093) | 2.38 | 1/32 (0.031) | 0.79 |
Over 12 [300] | +/- 1% of the specified outside diameter | |||
