ASTM A 312-seamless steel pipe and straight seam welded steel pipe
ASTM A 312 standard covers seamless steel pipe and straight-seam welded steel pipe manufactured for high-temperature and general corrosive service, it belongs to austenitic stainless steel family.
AGICO ANSON supplies ASTM A312 seamless pipes with standard manufacturer test certificate, IBR Test, Laboratory Test, Third party Inspection. Fabrication Serivices include: draw and expansion, polish, bending, annealed and pickled, sand blasting, machining. High quality ASTM A310 stainless steel pipe has advantages of high yield strength, high tensile strength, high resistant to temperature and pressure, good formablity. Most popular Steel grades of ASTM A312: TP304/304L, TP316/316L, TP304H, TP317L, TP321.
ASTM A312 Stainless Steel Pipe Dimension:
| NPS, inch | OD, mm | Wall Thickness, mm | Max. Length, м |
|---|---|---|---|
| 1/8 | 10,3 | 1,73; 2,11 | 12 |
| 1/4 | 13,7 | 2,24; 3,02 | |
| 3/8 | 17,1 | 2,31; 3,20 | |
| 1/2 | 21,3 | 2,11; 3,73 | |
| 3/4 | 26,7 | 2,87; 3,91 | |
| 1 | 33,4 | 3,38; 4,55; 6,35 | 10 |
| 1 1/4 | 42,4 | 3,56; 4,85; 6,35 | |
| 1 1/2 | 48,3 | 3,68; 5,03; 7,14 | |
| 2 | 60,3 | 3,58; 3,91; 4,37; 4,78; 6,35; 6,94; 7,14 | |
| 2 1/2 | 73,0 | 3,58; 3,95; 4,37; 4,78; 5,16; 5,49; 6,35; 7,01 |
ASTM A312 Mechanical property:
| Steel Grade | Tensile Strength, N/mm2 (min) | Yield Strength, N/mm2 (min) | Elongation, % (min) |
|---|---|---|---|
| TP304 | 515 | 205 | 35 |
| TP304L | 485 | 170 | 35 |
| TP316 | 515 | 205 | 35 |
| TP316L | 485 | 170 | 35 |
| TP321 |
OD < 17,1 mm - 515; OD > 17,1 mm - 485 |
OD < 17,1 mm - 205; OD > 17,1 mm - 170 |
35 |
| Steel Grade | C | Si | Mn | Cr | Ni | Mo | S | P |
|---|---|---|---|---|---|---|---|---|
| TP304 | 0,08 | 0,75 | 2 | 18 - 20 | 8 - 11 | - | 0,03 | 0,04 |
| TP304L | 0,035 | 0,75 | 2 | 18 - 20 | 8 - 13 | - | 0,03 | 0,04 |
| TP316 | 0,08 | 0,75 | 2 | 16 - 18 | 11 - 14 | 2 - 3 | 0,03 | 0,04 |
| TP316L | 0,035 | 0,75 | 2 | 16 - 18 | 10 - 15 | 2 - 3 | 0,03 | 0,04 |
| TP321 | 0,08 | 0,75 | 2 | 17 - 20 | 9 - 13 | - | 0,03 | 0,04 |
ASTM A312 Stainless Steel Pipes OD Tolerance
| NPS | ASTM A312 OD Tolerance | |||
|---|---|---|---|---|
| + | – | |||
| inch | mm | inch | mm | |
|
1/8~1 1 /2 > 1 1 /2~4 > 4~8 > 8~18 > 18~26 > 26~34 > 34~48 |
1/64(0.015) 1/32(0.031) 1/16(0.062) 3/32(0.093) 1/8(0.125) 5/32(0.156) 3/16(0.187) |
0.4 0.8 1.6 2.4 3.2 4.0 4.8 |
1/32(0.031) 1/32(0.031) 1/32(0.031) 1/32(0.031) 1/32(0.031) 1/32(0.031) 1/32(0.031) |
0.8 0.8 0.8 0.8 0.8 0.8 0.8 |
ASTM A312 Stainless Steel Pipes WT Tolerance %
| NPS | ASTM A312 WT Tolerance, % | |
|---|---|---|
| + | – | |
| 1/8-2 1 /2 | 20.0 | 12.5 |
| 3~18, t/D≤ 5% | 22.5 | 12.5 |
| 3~18, t/D> 5% | 15.0 | 12.5 |
| ≥ 20, welded | 17.5 | 12.5 |
| ≥ 20, seamless, t/D≤ 5% | 22.5 | 12.5 |
| ≥ 20, seamless, t/D> 5% | 15.0 | 12.5 |
