ASTM A333/A333M

ASTM A333/A333M Standard Specification for Seamless and Welded Steel Pipe for Low-Temperature Service and Other Applications with Required Notch Toughness.

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ASTM A333 Low Temperature Pipe

ASTM A333/A333M specification covers wall seamless and welded carbon and alloy steel pipe intended for use at low temperatures. The pipe shall be made by the seamless or welding process with the addition of no filler metal in the welding operation. All seamless and welded pipes shall be treated to control their microstructure. Tensile tests, impact tests, hydrostatic tests, and nondestructive electric tests shall be made in accordance to specified requirements.

Mechanical requirements of ASTM A333 alloy pipe

Grade Tensile Strength (MPa) Yield Point (MPa) Elongation (%)
Y X
ASTM A333 Grade 1 ≥380 ≥205 ≥35 ≥25
ASTM A333 Grade 3 ≥450 ≥240 ≥30 ≥20
ASTM A333 Grade 4 ≥415 ≥240 ≥30 ≥16.5
ASTM A333 Grade 6 ≥415 ≥240 ≥30 ≥16.5
ASTM A333 Grade 7 ≥450 ≥240 ≥30 ≥22
ASTM A333 Gr. 8 ≥690 ≥515 ≥22
ASTM A333 Grade 9 ≥435 ≥315 ≥28
ASTM A333 Grade 10 ≥550 ≥450 ≥22
ASTM A333 Grade 11 ≥450 ≥240 ≥18

*The elongation values are furnished on the basis of standard round 2 inch or 50 mm(or 4D) specimens.

*Elongation of Grade 11 is for all walls and small sizes tested in full section.

Chemical composition of ASTM A333 alloy pipe

Grade Chemical Composition (%)
C Si Mn P S Cr Ni Cu Mo V Al
Grade 1 ≤0.30 0.40-1.06 ≤0.025 ≤0.025
Grade 3 ≤0.19 0.18-0.37 0.31-0.64 ≤0.025 ≤0.025 3.18-3.82
Grade 4 ≤0.12 0.18-0.37 0.50-1.05 ≤0.025 ≤0.025 0.44-1.01 0.47-0.98 0.40-0.75 0.04-0.30
Grade 6 ≤0.30 ≥0.10 0.29-1.06 ≤0.025 ≤0.025
Grade 7 ≤0.19 0.13-0.32 ≤0.90 ≤0.025 ≤0.025 2.03-2.57
Grade 8 ≤0.13 0.13-0.32 ≤0.90 ≤0.025 ≤0.025 8.40-9.60
Grade 9 ≤0.20 0.40-1.06 ≤0.025 ≤0.025 1.60-2.24 0.75-1.25
Grade 10 ≤0.20 0.10-0.35 1.15-1.50 ≤0.03 ≤0.015 ≤0.15 ≤0.25 ≤0.015 ≤0.50 ≤0.12 ≤0.06
Grade 11 ≤0.10 ≤0.35 ≤0.6 ≤0.025 ≤0.025 ≤0.50 35.0-37.0 ≤0.50

*For Grade 1 and 6, each reduction of 0.01% C below 0.30%, an increase of 0.05 % Mn above 1.06 % would be permitted to a max. of 1.35%.

*For Grade 6, the limit for columbium may be increased up to 0.05 % on heat analysis and 0.06 % on product analysis.

*Generally, the carbon equivalent C.E = [C + Mn/6 + (Cr + Mo + V)/5 + (Ni + Cu)/15] shall not exceed 0.43% by heat analysis.

Production specification range of low temperature pipe products

No. Order No. Size description
O.D. /mm W.T. /mm Legnth /m
1 A333 Gr.6 A333 Gr.6/X42NS 10-127 1-20 6-12.0
42-114.3 3.5-6 6-12.2
42-114.3 6-12 6-12.2
114.3-180 3.8-8 6-12.2
114.3-180 8-22 6-12.2
68-180 10-14 6-12.2
69-254 14-55 6-12.2
140-340 6-8 6-12.2
140-368 8-42 6-12.2
318-720 14-50 4-12.5
2 A333 Gr.6/X52QS 42-114.3 3.5-12 6-12.2
114.3-180 3.8-22 6-12.2
68-254 10-40 6-12.2
140-368 6-40 6-12.2
318-720 14-40 4-12.5
140-368 6-25 6-12.2
318-720 14-25 4-12.5
3 16MnDG 10-127 1-20 6-12.0
42-114.3 3.5-12 6-12.2
114.3-180 3.8-22 6-12.2
68-254 10-55 6-12.2
140-368 6-42 6-12.2
318-720 14-120 4-12.5

Strike temperature condition

Crade The lowest temperature for strike test
ASTM A333 Grade 1 -50 -45
ASTM A333 Grade 3 -150 -100
ASTM A333 Grade 4 -150 -100
ASTM A333 Grade 6 -50 -45
ASTM A333 Grade 7 -100 -75
ASTM A333 Grade 8 -320 -195
ASTM A333 Grade 9 -100 -75
ASTM A333 Grade 10 -75 -60

Q&A

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The most important and desired changes in alloy steel are

Alloy steels are made by combining carbon steel with one or several alloying elements, such as manganese, silicon, nickel, titanium, copper, chromium and aluminum. These metals are added to produce specific properties that are not found in regular carbon steel. The elements are added in varying proportions (or combinations) making the material take on different aspects such as increased hardness, increased corrosion resistance, increased strength, improved formability (ductility); the weldability can also change.

Alloying Elements & Their Effects

Pipes, Tubes and Hollow Sections

Norms

Grade

Alloying Elements

Commonly used alloying elements and their effects are listed in the table given below.

Alloying Elements Effect on the Properties
Chromium Increases Resistance to corrosion   and oxidation. Increases hardenability and wear resistance. Increases high   temperature strength.
Nickel Increases hardenability. Improves   toughness. Increases impact strength at low temperatures.
Molybdenum Increases hardenability, high   temperature hardness, and wear resistance. Enhances the effects of other   alloying elements. Eliminate temper brittleness in steels. Increases high   temperature strength.
Manganese Increases hardenability. Combines   with sulfur to reduce its adverse effects.
Vanadium Increases hardenability, high   temperature hardness, and wear resistance. Improves fatigue resistance.
Titanium Strongest carbide former. Added to   stainless steel to prevent precipitation of chromium carbide.
Silicon Removes oxygen in steel making.   Improves toughness. Increases hardness ability
Boron Increases hardenability. Produces   fine grain size.
Aluminum Forms nitride in nitriding steels.   Produces fine grain size in casting. Removes oxygen in steel melting.
Cobalt Increases heat and wear   resistance.
Tungsten Increases hardness at elevated   temperatures. Refines grain size.

ASTM A335 Chrome Moly Pipe

ASTM A335 Pipe (ASME S/A335, Chorme-Moly) is a seamless ferritic Alloy-Steel Pipe for high temperature service.

ASTM A213 Tubes

ASTM A213 covers seamless ferritic and austenitic steel boiler,Boiler Tube, and heat-exchanger tubes for high temperature services, designated Grades T5, TP304, etc.

【H】 Ceramic lined pipe

Ceramic lined pipe is made through self-propagating high-temperature synthesis (SHS) technique.

【H】 Cast basalt lined steel pipe

Cast basalt lined steel pipe is composed by lined with cast basalt pipe, outside steel pipe and cement mortar filling between the two layers.

【H】 Ceramic Tile Lined Pipes

Ceramic tile lined pipes have very uniform coating of specially formulated ceramic material that is affixed to the inner of the pipe.

【H】 Rare earth alloy wear-resistant pipe

The material of the rare earth alloy wear-resistant pipe is ZG40CrMnMoNiSiRe, which is also the grade of rare earth alloy steel.

【H】 Tubes Erosion Shields

Tubes Erosion Shields are used to protect boiler tubing from the highly erosive effects of high temperatures and pressures thereby greatly extending tube life.

【H】 ASTM A213 T91 Alloy Tube

The ASTM A213 T91 seamless tubes are primarily used for boiler, superheater, and heat-exchanger.

Ni-Hard Wearback Pipes Ni-Hard Wearback Pipes
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