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Introduction
ASTM A335 /
A335M covers seamless ferritic alloy steel pipes intended for high-temperature
and high-pressure service. These pipes are designed to provide excellent
strength, creep resistance, and oxidation resistance in elevated temperature
environments.
ASTM A335
alloy steel pipes are widely used in power plants, refineries, and
petrochemical industries where performance under extreme heat and pressure is
critical.
Ladhani
Metal Corporation is a manufacturer, supplier, and exporter of ASTM A335 /
A335M alloy steel pipes, supplying high-quality seamless pipes for critical
high-temperature applications.
Applicable Standard
Standard
Specification: ASTM A335 / A335M
Organization: ASTM International
Title: Standard Specification for Seamless Ferritic Alloy-Steel Pipe for
High-Temperature Service
This
specification covers alloy steel pipes designed for high-temperature service
and pressure applications.
Forms of Supply
ASTM A335
alloy steel pipes are supplied in the following forms:
Seamless
pipes
Hot finished pipes
Cold drawn pipes
Cut-to-length pipes
Supply
Condition
Normalized
and tempered
Annealed condition
Heat-treated condition
Surface
Finish
Mill finish
Shot blasted
Pickled (if required)
Standard
Sizes
Outside
Diameter: 6 mm to 600 mm
Wall Thickness: 1 mm to 50 mm
Length: Up to 12 meters or as required
Grades
Covered Under ASTM A335 / A335M
P1
P5
P9
P11
P22
P91
P92
These grades
are chromium-molybdenum alloy steels offering excellent high-temperature
strength and corrosion resistance.
Chemical Composition of ASTM A335 Alloy Steel Pipes (%)
|
Grade |
Carbon |
Manganese |
Phosphorus (Max) |
Sulfur (Max) |
Silicon |
Chromium |
Molybdenum |
Others |
|
P1 |
0.10–0.20 |
0.30–0.80 |
0.025 |
0.025 |
0.10–0.50 |
— |
0.44–0.65 |
— |
|
P2 |
0.10–0.20 |
0.30–0.61 |
0.025 |
0.025 |
0.10–0.30 |
0.50–0.81 |
0.44–0.65 |
— |
|
P5 |
0.15 max |
0.30–0.60 |
0.025 |
0.025 |
0.50 max |
4.00–6.00 |
0.45–0.65 |
— |
|
P5b |
0.15 max |
0.30–0.60 |
0.025 |
0.025 |
1.00–2.00 |
4.00–6.00 |
0.45–0.65 |
— |
|
P5c |
0.12 max |
0.30–0.60 |
0.025 |
0.025 |
0.50 max |
4.00–6.00 |
0.45–0.65 |
B |
|
P9 |
0.15 max |
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 max |
0.80–1.25 |
0.44–0.65 |
— |
|
P15 |
0.05–0.15 |
0.30–0.60 |
0.025 |
0.025 |
— |
1.15–1.65 |
0.44–0.65 |
— |
|
P21 |
0.05–0.15 |
0.30–0.60 |
0.025 |
0.025 |
0.50 max |
2.65–3.35 |
0.80–1.06 |
— |
|
P22 |
0.05–0.15 |
0.30–0.60 |
0.025 |
0.025 |
0.50 max |
1.90–2.60 |
0.87–1.13 |
— |
|
P23 |
0.04–0.10 |
0.10–0.60 |
0.030 |
0.010 |
0.50 max |
1.90–2.60 |
0.05–0.30 |
V, Nb, B, N, Al, W, Ni, Ti |
|
P24 |
0.05–0.10 |
0.30–0.70 |
0.020 |
0.010 |
0.15–0.45 |
2.20–2.60 |
0.90–1.10 |
V, Ti, N |
|
P36 |
0.10–0.17 |
0.80–1.20 |
0.030 |
0.025 |
0.25–0.50 |
0.30 max |
— |
— |
|
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 |
V, Nb, N, B, Ni, Al |
|
P92 |
0.07–0.13 |
0.30–0.60 |
0.020 |
0.010 |
0.50 max |
8.50–9.50 |
0.30–0.60 |
V, N, Nb, W, B |
|
P122 |
0.07–0.14 |
0.70 max |
0.020 |
0.010 |
0.50 max |
10.00–11.50 |
0.25–0.60 |
V, W, Cu, Nb, B, N |
|
P911 |
0.09–0.13 |
0.30–0.60 |
0.020 |
0.010 |
0.10–0.50 |
8.5–9.5 |
0.90–1.10 |
V, Nb, B, N, W |
Notes:
- “max”
= maximum allowed percentage
- “—”
= not specified
- “Others”
include micro-alloying elements like Vanadium (V), Niobium (Nb/Cb), Boron
(B), Nitrogen (N), Tungsten (W), etc
Tensile
Requirements
|
Grade |
Tensile Strength (min) ksi |
Tensile Strength (min) MPa |
Yield Strength (min) ksi |
Yield Strength (min) MPa |
|
P1, P2 |
55 |
380 |
30 |
205 |
|
P12 |
60 |
415 |
32 |
220 |
|
P23 |
74 |
510 |
58 |
400 |
|
P24
(Type 1 & Type2) |
85 |
585 |
60 |
415 |
|
P91 |
85 |
585 |
60 |
415 |
|
P92,
P911 |
90 |
620 |
64 |
440 |
|
P36
Class 1 |
90 |
620 |
58 |
400 |
|
P122 |
95.5 |
660 |
66.5 |
460 |
|
P36
Class 2 |
60 |
415 |
30 |
205 |
|
All
Others |
60 |
415 |
30 |
205 |
Key Features of ASTM A335 Alloy Steel Pipes
Excellent
high-temperature strength
Superior creep and oxidation resistance
Good resistance to thermal stress
High durability under pressure conditions
Suitable for critical applications
Long service life in extreme environments
Applications of ASTM A335 Alloy Steel Pipes
ASTM A335
pipes are widely used in industries requiring high-temperature and
high-pressure performance.
Power Plants
• Boiler tubes
• Superheater piping
• Steam lines
Oil &
Gas Industry
• High-temperature pipelines
• Refinery piping
Petrochemical
Industry
• Process piping
• Heat-resistant systems
Industrial
Boilers
• Steam generation systems
• Pressure piping
Heat Treatment
Pipes are
typically normalized and tempered
Heat treatment improves creep strength and toughness
Ensures performance under high-temperature conditions
Conclusion
ASTM A335 /
A335M alloy steel pipes provide a reliable solution for high-temperature and
high-pressure applications. With a wide range of chromium-molybdenum grades,
these pipes offer excellent strength, durability, and resistance to extreme
operating conditions.
Ladhani
Metal Corporation supplies ASTM A335 / A335M alloy steel pipes in various
grades and sizes, ensuring high-quality products for power plants, refineries,
and industrial applications.
FOR REQUIREMENT OF THIS GRADE OR FOR DETAIL CONTACT US AT :-
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 – Complete Guide to Grades, Properties & Applications){kind=link}