Low Temperature Steel Pipes, SA333 Gr.1, SA333 Gr.3, SA333 Gr.6, ASTM A333, ASME SA333, SA333 Grade 1, Grade 3, Grade 6

ASTM A333/ASME SA333 Standard Specification for Seamless and Welded Steel Pipe for Low-Temperature Service

Standard: ASTM A333, ASME SA333
Equivalent Standard: NBR 5602

Material: SA333 Grade 6

Chemistry Composition

C, %	Mn, %	Si, %	P, %	S, %
0.30 max	0.29-1.06	0.10 min	0.025 max	0.025 max

Mechanical Properties

Tensile Strength , MPa	Yield Strength , MPa	Elongation, %
415 min	240 min	30 min

Outside Diameter & Tolerance

Outside Diameter , inch	Tolerance, mm
1/8≤OD≤1-1/2	±0.40
1-1/2＜OD≤4	±0.79
4＜OD≤8	+1.59/-0.79
8＜OD≤18	+2.38/-0.79
18＜OD≤26	+3.18/-0.79
26＜OD≤34	+3.96/-0.79
OD>34	+4.75/-0.79

Wall thickness & Tolerance

Outside Diameter, inch	Tolerance, %
1/8≤OD≤2-1/2	+20.0/-12.5
3≤OD≤18, WT/OD≤5%	+22.5/-12.5
3≤OD≤18, WT/OD>5%	+15.0/-12.5
OD≥20, WT/OD≤5%	+22.5/-12.5
OD≥20, WT/OD>5%	+15.0/-12.5

A333/A333M specification covers nominal (average) wall seamless and welded carbon and alloy steel pipe intended for use at low temperatures and in other applications requiring notch toughness. Some product sizes may not be available under A333/A333M because heavier wall thicknesses have an adverse effect on impact properties.

Manufacture: the tubes shall be made by the seamless process and shall be either hot-finished or cold-finished, as specified.
Heat Treatment: all seamless tubes shall be treated to control their microstructure in accordance with one of the following methods:
a: Normalize by heating to a uniform temperature of not less than 1500 °F [815 °C] and cool in air or in the cooling chamber of an atmosphere controlled furnace.
b: Reheat and control hot working and the temperature of the hot-finishing operation to a finishing temperature range from 1550 to 1750 °F [845 to 955°C] and cool in a controlled atmosphere furnace from an initial temperature of not less than 1550 °F [845 °C].
Inspection & Test: chemistry composition analysis, tension test, flattening test, flaring test, impact test, NDT, surface inspection and dimension check.

Length: 5800mm; 6000mm; 6096mm; 7315mm; 11800mm; and so on.
Max length: 18000mm.

Keyword: seamless steel pipe, seamless steel tube, low carbon steel tube, ASTM A333, ASME SA333

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