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ASTM A333 Pipe Specifications

ASTM A333 is the standard specification for seamless and welded carbon and alloy steel pipe for low temperature service or other applications requiring notch toughness.

What is ASTM A333 pipe?

ASTM A333 Pipe shall be made by the seamless or welding process with the addition of no filler metal in the welding operation.

ASTM A333 Frequently used name: killed carbon steel

This specification covers nominal (average) wall seamless and welded carbon and alloy steel pipe intended for use at low temperatures. Several grades of ferritic steel are included. Some product sizes may not be available under this specification because heavier wall thicknesses have an adverse affect on low-temperature impact properties.

Material & Manufacture
ASTM A333 Pipe shall be made by the seamless or welding process with the addition of no filler metal in the welding operation.

Heat Treatment Requirements
All seamless and welded pipe shall be treated to control their microstructure by the following methods:
Normalizing per A 333/A 333M-05 section 4.2.1.1; section 4.2.1.2 or section 4.2.1.3
Quenched and Tempered per A 333/A 333M – 05 section 4.2.2.1
Double Normalized and Tempered per A 333/A 333M – 05 section 4.2.2.2

For each reduction of 0.01% carbon below 0.30%, an increase of 0.05% manganese above 1.06% would be permitted to a maximum of 1.35% manganese.
When Grade 6 is ordered under this specification, supplying an alloy grade that specifically requires the addition of any element other than those listed for the ordered grade is not permitted. However, the addition of elements required for the deoxidation of the steel is permitted.

Heat Treatment Requirements

All seamless and welded pipe shall be treated to control their microstructure by the following methods: Normalizing per A 333/A 333M-05 section 4.3.1.1; section 4.3.1.2 or section 4.3.1.3 Quenched and Tempered per A 333/A 333M – 05 section 4.3.2.1 Double Normalized and Tempered per A 333/A 333M – 05 section 4.3.2.2

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

Tensile Requirements
The material shall conform to the requirements as proscribed:

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