ASTM A632 specification covers grades of stainless steel tubing for general corrosion-resisting and low or high-temperature service. Seamless and Welded Austenitic Stainless Steel Tubes shall be cold finished and shall be made by the seamless or welded process.
ASTM A632 Stainless steel tubing in sizes under 1/2 down to 0.050 in. (12.7 to 1.27 mm) in outside diameter and wall thicknesses less than 0.065 in. down to 0.005 in. (1.65 to 0.13 mm) for general corrosion-resisting and low- or high-temperature serviceAll material shall be furnished in the heat-treated condition.
ASTM A632 stainless steel tubing heat-treatment procedure shall consist of heating the material and quenching in water or rapidly cooling by other means. ASTM A632 tp304 seamless and welded tubing tension tests, flaring tests, hydrostatic tests, air underwater pressure tests, and nondestructive electric tests shall be performed in accordance to the specified requirements.
| Specifications | Range |
| Out Diameter | 1.27mm to 12.7mm |
| Wall Thickness | 0.13mm to 1.65mm |
| Specifications | ASTM A632/ ASME SA632 | |
| Grades | 304,304l,310,316,316l,317,321,347,348 | |
| O.D. | 12.7 – 102 MM | |
| Wall Thickness | 0.5 – 5 MM | |
| Length | Straight Lenghts upto 30 meters | |
| Schedule | SCH. 5, 10, 20, 30, 40, 60, 80, 100, 120, 140, 160, XXS. | |
| Welding Method | TIG or TIG + Plasma or Laser | |
| Finish | 2B MIll Finish , No.4 finish, BA Finish, 400 Grit Finish, 550 Grit Finish, 600 Grit Finish | |
| Types | Round, Square, Rectangle, Coil, "U" Shape, Hydraulic & Honed Tubes |
| GRADE | UNS NO | DIN/WERKSTOFF |
|---|---|---|
| ASTM A632 304 | S30400 | 1.4301 |
| ASTM A632 304L | S30403 | 1.4306 |
| ASTM A632 310 | S31000 | 1.4845 |
| ASTM A632 316L | S31603 | 1.4404 |
| ASTM A632 317L | S31703 | 1.4438 |
| ASTM A632 321 | S32100 | 1.4541 |
| ASTM A632 321H | S32109 | – |
| ASTM A632 347 | S34700 | 1.4550 |
| ASTM A632 348 | S34800 |
|
Ratio of Inside Diameter |
Minimum Expansion of |
|
to Outside Diameter |
Inside Diameter, % |
|
0.9 |
21 |
|
0.8 |
22 |
|
0.7 |
25 |
|
0.6 |
30 |
|
0.5 |
39 |
|
0.4 |
51 |
|
0.3 |
68 |
ASTM A632 Standard Specification for Seamless and Welded Austenitic Stainless Steel Tubing (Small-Diameter) for General Service covers grades of stainless steel tubing for general corrosion-resisting and low or high-temperature service. The tubes shall be cold finished and shall be made by the seamless or welded process. All material shall be furnished in the heat-treatedcondition. The heat-treatment procedure shall consist of heating the material and quenching in water or rapidly cooling by other means. Tension tests, flaring tests, hydrostatic tests, air underwater pressure tests, and nondestructive electric tests shall be performed in accordance to the specified requirements.
1.1 This specification covers grades of stainless steel tubing in sizes under ½ down to 0.050 in. (12.7 to 1.27 mm) in outside diameter and wall thickness less than 0.065 in. down to 0.005 in. (1.65 to 0.13 mm) for general corrosion-resisting and low- or high-temperature service, as designated in Table 1.
Note 1—The grades of austenitic stainless steel tubing furnished in accordance with this specification have been found suitable for low-temperature service down to −325°F (−200°C) in which Charpy notched-bar impact values of 15 ft·lbf (20 J), minimum, are required and these grades need not be impact tested.
1.2 Optional supplementary requirements are provided and, when desired, shall be so stated in the order.
1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
Exhibition
We are a steel pipe factory offered ASTM A632 seamless and welded austenitic tubing primarily consist of the austenitic grades of stainless steel including 304, 30l4, 316, 316L, 321, 347 and 348 with annealed and pickled, bright annealed mill finish, polished finish.
