ASTM A312 Pipe
What is ASTM A312 Steel Pipe?
ASTM A312 pipe is the general use stainless steel pipe applied in different industries. It covers diameters from 1/8” to 30” and thickness from SCH 10S to SCH 80S. Common use material grades are TP304/304L, TP316/316L.
The standard specifications include seamless, straight seam welded and heavily cold welded austenitic stainless steel tubing for high temperature and general corrosive service. There are several grades in this standard, and each steel grade shall confirm to the required chemical composition of C, Mn, P, S, Si, Cr and Cr, Ni, Mo, etc. All the pipes shall be furnished in the heat-treated condition in accordance with the required heat treating temperature and cooling/testing requirements. And also need to comply to the required tensile strength and yield strength.
Dimension
|
Group |
Grade |
Type |
Total elongation under load % |
Yield strength Mpa |
Tensile strength min MPa |
Hardness max |
||
|
min |
max |
HRC |
HBW |
|||||
|
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
|
1 |
J55 |
- |
0.5 |
379 |
552 |
517 |
- |
- |
|
K55 |
- |
0.5 |
379 |
552 |
655 |
- |
- |
|
|
N80 |
1 |
0.5 |
552 |
758 |
689 |
- |
- |
|
|
N80 |
Q |
0.5 |
552 |
758 |
689 |
- |
- |
|
|
2 |
L80 |
1 |
0.5 |
552 |
655 |
655 |
23 |
241 |
|
L80 |
9Cr |
0.5 |
552 |
655 |
655 |
23 |
241 |
|
|
L80 |
13Cr |
0.5 |
552 |
655 |
655 |
23 |
241 |
|
|
C90 |
|
0.5 |
621 |
724 |
689 |
25.4 |
255 |
|
|
C95 |
- |
0.5 |
655 |
758 |
724 |
- |
- |
|
|
T95 |
|
0.5 |
655 |
758 |
724 |
25.4 |
255 |
|
|
3 |
P110 |
- |
0.6 |
758 |
965 |
862 |
- |
- |
|
4 |
Q125 |
All |
0.65 |
862 |
1034 |
931 |
- |
-
|
Mechanical Properties
| Label | D Outside diameter mm | Wall thickness t mm | C Type of end-finish | |||||||||
| 1 | 2 | H40 | J55 | L80 | N80 1Q | C90 | T95 | P110 | ||||
| NU T&C | EU T&C | IJ | ||||||||||
| 1 | 2 | 3 | 4 | 5 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 |
| 1.9 | 2.75 | 2.9 | 2.76 | 48.26 | 3.68 | PNUI | PNUI | PNUI | PNUI | PNUI | PNUI | - |
| 1.9 | 3.65 | 3.73 | - | 48.26 | 5.08 | PU | PU | PU | PU | PU | PU | PU |
| 1.9 | 4.42 | - | - | 48.26 | 6.35 | - | - | P | - | P | P | - |
| 2.375 | 4 | - | - | 60.32 | 4.24 | PU | PN | PN | PN | PN | PN | - |
| 2.375 | 4.6 | 4.7 | - | 60.32 | 4.83 | PNU | PNU | PNU | PNU | PNU | PNU | PNU |
| 2.375 | 5.8 | 5.95 | - | 60.32 | 6.45 | - | - | PNU | PNU | PNU | PNU | PNU |
| 2.375 | 6.6 | - | - | 60.32 | 7.49 | - | - | P | - | P | P | - |
| 2.375 | 7.35 | 7.45 | - | 60.32 | 8.53 | - | - | PU | - | PU | PU | - |
| 2.875 | 6.4 | 6.5 | - | 73.02 | 5.51 | PNU | PNU | PNU | PNU | PNU | PNU | PNU |
| 2.875 | 7.8 | 7.9 | - | 73.02 | 7.01 | - | - | PNU | PNU | PNU | PNU | PNU |
| 2.875 | 8.6 | 8.7 | - | 73.02 | 7.82 | - | - | PNU | PNU | PNU | PNU | PNU |
| 2.875 | 9.35 | 9.45 | - | 73.02 | 8.64 | - | - | PU | - | PU | PU | - |
| 2.875 | 10.5 | - | - | 73.02 | 9.96 | - | - | P | - | P | P | - |
| 3.5 | 7.7 | - | - | 88.9 | 5.49 | PN | PN | PN | PN | PN | PN | - |
| 3.5 | 9.2 | 9.3 | - | 88.9 | 6.45 | PNU | PNU | PNU | PNU | PNU | PNU | PNU |
| 3.5 | 10.2 | - | - | 88.9 | 7.34 | PN | PN | PN | PN | PN | PN | - |
| 3.5 | 12.7 | 12.95 | - | 88.9 | 9.52 | - | - | PNU | PNU | PNU | PNU | PNU |
| 3.5 | 14.3 | - | - | 88.9 | 10.92 | - | - | P | - | P | P | - |
| 3.5 | 15.5 | - | - | 88.9 | 12.09 | - | - | P | - | P | P | - |
| 4 | 9.5 | - | - | 101.6 | 5.74 | PN | PN | PN | PN | PN | PN | - |
| 4 | 10.7 | 11 | - | 101.6 | 6.65 | PU | PU | PU | PU | PU | PU | - |
| 4 | 13.2 | - | - | 101.6 | 8.38 | - | - | P | - | P | P | - |
| 4 | 16.1 | - | - | 101.6 | 10.54 | - | - | P | - | P | P | - |
| 4.5 | 12.6 | 12.75 | - | 114.3 | 6.88 | PNU | PNU | PNU | PNU | PNU | PNU | - |
| 4.5 | 15.2 | - | - | 114.3 | 8.56 | - | - | P | - | P | P | - |
Production Process
Manufacturing process of ASTM A312 Seamless Steel Pipe
Manufacturing process of ASTM A312 Welded Steel Pipe
Application of ASTM A312 Steel Pipe
- Kitchen benches, sinks, troughs, equipment and appliances
- Architectural paneling, railings & trim
- Chemical containers, including for transport
- Heat Exchangers
- Woven or welded screens for mining, quarrying & water filtration
- Threaded fasteners
- Water Supply Systems
- Power Plant
- Paper and pulp Industry
- General Purpose Applications
- Fabrication Industry
- Food Processing Industry
- Industrial Structural Project
- Oil and Gas Pipeline
- Chemical Industry
- Plumbing Industrial
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