ASTM A334 grade 3 Seamless pipe tube for low temperature
ASTM A334 is the Standard Specification for Seamless and Welded Carbon and Alloy-Steel Tubes for Low-Temperature Service
We are a professional manufacturer and exporter of ASTM A334 grade 3 tube in China.
This specification covers several grades of minimumwall-thickness, seamless and welded, carbon and alloy-steel tubes intended for use at low temperatures. Some product sizes may not be available under this specification because heavier wall thicknesses have an adverse affect on low-temperature impact properties
Grade 3 is one of the steel grade under ASTM A334 standard.
ASTM A334 grade 3 seamless pipe Chemistry Composition
|
C, %
|
Mn, %
|
P, %
|
S, %
|
Si, %
|
Ni, %
|
|
0.19 max
|
0.31-0.64
|
0.025 max
|
0.025 max
|
0.18-0.37
|
3.18-3.82
|
| ASTM A334 grade 3 Seamless pipe Mechanical Properties | |||||||||
|
|||||||||
ASTM A334 grade 3 seamless pipe 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 1550°F [845°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, hardness test, impact test, NDT, surface inspection and dimension check.
ASTM A334 grade 3 seamless tube specificstion
Grade: 1, 3, 6, 7, 8, 9
Type: Seamless – Hot Rolled / Cold Drawn
Size range:OD: 9.53mm – 127mm WT: 1 – 12mm
Length:6000mm or customized length
Application: Boiler, Heat exchanger, condenser, preheater, etc
