ASTM A249 304 316 Welded Austenitic Stainless Steel Tube for Boilers / Heat Exchanger
Size:
OD: 1/8 in (3.2mm) to 5 in (127mm)
WT: 0.015 to 0.320 in (0.4 to 8.1mm)
Grade:
TP304H, TP309H, TP310H, TP316H, TP312H, TP347H and TP348H.
TP304, TP309S, TP310S, TP310Cb, TP316, TP321, TP347, TP348
For high-temperature service such as for superheaters and reheaters
Application:
Boiler, Superheater, Heat Exchanger, Condensor Tubes
Austenitic stainless steel, temperature service applications, high temperature applications
Manufacture:
The tubes are made from flat-rolled steel by an automatic welding process with no addition of filler metal.
Subsequent to welding and prior to final heat treatment, the tubes are cold worked on weld and base metal or in weld metal
Test and inspection:
Tension test
Flattening test
Flange test
Reverse-Bend test
Hardness test
Hydrostatic or Nondestructive Electric Test
Grain size
Table 1 Chemical Composition(cast analysis)a of Austenitic Corrosion Resisting Steels,in % By Mass(continued)
| Steel Grade | C max | Si | Mn | P max | S max | N | Cr | Cu | Mo | Nb | Ni | Ti | Others |
| Steel Name | Steel Number |
| X2CrNi18-9 | 1.4307 | 0.030 | ≤1.00 | ≤2.00 | 0.040 | 0.015b | ≤0.11 | 17.50 to 19.50 | - | - | - | 8.00 to 10.00c | - | - |
| X2CrNi19-11 | 1.4306 | 0.030 | ≤1.00 | ≤2.00 | 0.040 | 0.015b | ≤0.11 | 18.00 to 20.00 | - | - | - | 10.00 to 12.00d | - | - |
| X2CrNiN18-10 | 1.4311 | 0.030 | ≤1.00 | ≤2.00 | 0.040 | 0.015 | 0.12-0.22 | 17.00 to 19.50 | - | - | - | 8.50 to 11.50 | - | - |
| X5CrNi18-10 | 1.4301 | 0.07 | ≤1.00 | ≤2.00 | 0.040 | 0.015 b | ≤0.11 | 17.00 to 19.50 | - | - | - | 8.00 to 10.50 | - | - |
| X6CrNiTi18 -10 | 1.4541 | 0.08 | ≤1.00 | ≤2.00 | 0.040 | 0.015 | - | 17.00 to 19.00 | - | - | - | 9.00 to 12.00d | 5xC to 0.70 | - |
| X6CrNiNb18 -10 | 1.4550 | 0.08 | ≤1.00 | ≤2.00 | 0.040 | 0.015 | - | 17.00 to 19.00 | - | - | 10xC to 1.00 | 9.00 to 12.00d | - | - |
| X1CrNi25-21 | 1.4335 | 0.020 | ≤0.25 | ≤2.00 | 0.025 | 0.010 | ≤0.11 | 24.00 to 26.00 | - | ≤0.20 | - | 20.00 to 22.00 | - | - |
| X2CrNiMo17-12-2 | 1.4404 | 0.030 | ≤1.00 | ≤2.00 | 0.040 | 0.015 b | ≤0.11 | 16.50 to 18.50 | - | 2.00to 2.50 | - | 10.00 to 13.00e | - | - |
| X5CrNiMo17-12-2 | 1.4401 | 0.07 | ≤1.00 | ≤2.00 | 0.040 | 0.015 b | ≤0.11 | 16.50 to 18.50 | - | 2.00to 2.50 | - | 10.00 to 13.00 | - | - |
| X1CrNiMoN 25-22-2 | 1.4466 | 0.020 | ≤0.70 | ≤2.00 | 0.025 | 0.010 | 0.10to 0.16 | 24.00 to 26.00 | - | 2.00to 2.50 | - | 21.00 to 23.00 | - | - |
| X6CrNiMoTi 17-12-2 | 1.4571 | 0.08 | ≤1.00 | ≤2.00 | 0.040 | 0.015 b | - | 16.50 to 18.50 | - | 2.00to 2.50 | - | 10.50 to 13.50c | 5xC to 0.70 | - |
| X6CrNiMoNb 17-12-2 | 1.4580 | 0.08 | ≤1.00 | ≤2.00 | 0.040 | 0.015 | - | 16.50 to 18.50 | - | 2.00to 2.50 | 10xC-1.00 | 10.50 to 13.50 | - | - |
| X2CrNiMoN 17-13-3 | 1.4429 | 0.030 | ≤1.00 | ≤2.00 | 0.040 | 0.015 | 0.12to 0.22 | 16.50 to 18.50 | - | 2.00to 3.00 | - | 11.00 to 14.00d | - | - |
| X3CrNiMo17 -13-3 | 1.4436 | 0.05 | ≤1.00 | ≤2.00 | 0.040 | 0.015 b | ≤0.11 | 16.50 to 18.50 | - | 2.00to 3.00 | - | 10.50 to 13.00d | - | - |
| X2CrNiMo18-14-3 | 1.4435 | 0.030 | ≤1.00 | ≤2.00 | 0.040 | 0.015 b | ≤0.11 | 17.00 to 19.00 | - | 2.00to 3.00 | - | 12.50 to 15.00 | - | - |
| X2CrNiMoN17 -13-5 | 1.4439 | 0.030 | ≤1.00 | ≤2.00 | 0.040 | 0.015 | 0.12to 0.22 | 16.50 to 18.50 | - | 4.00to 5.00 | - | 12.50 to 14.50 | - | - |
| Steel Grade | C max | Si | Mn | P max | S max | N | Cr | Cu | Mo | Nb | Ni | Ti | Others |
| Steel name | Steel name |
| X1NiCrMoCu 31-27-4 | 1.4563 | 0.020 | ≤0.70 | ≤2.00 | 0.030 | 0.010 | ≤0.11 | 26.00 to 28.00 | 0.70 to 1.50 | 3.00 to 4.00 | - | 30.00 to 32.00 | - | - |
| X1NiCrMoCu 25-20-5 | 1.4539 | 0.020 | ≤0.70 | ≤2.00 | 0.030 | 0.010 | ≤0.15 | 19.00 to 21.00 | 1.20 to 2.00 | 4.00 to 5.00 | - | 24.00 to 26.00 | - | - |
| X1CrNiMoCuN 20-18-7 | 1.4547 | 0.020 | ≤0.70 | ≤1.00 | 0.030 | 0.010 | 0.18to 0.25 | 19.50 to 20.50 | 0.50 to 1.00 | 6.00 to 7.00 | - | 17.50 to 18.50 | - | - |
| X1NiCrMoCuN 25-20-7 | 1.4529 | 0.020 | ≤0.50 | ≤1.00 | 0.030 | 0.010 | 0.15to 0.25 | 19.00 to 21.00 | 0.50 to 1.50 | 6.00 to 7.00 | - | 24.00 to 26.00 | - | - |
| X2NiCrAlTi32-20 | 1.4558 | 0.030 | ≤0.70 | ≤1.00 | 0.020 | 0.015 | - | 20.00 to 23.00 | - | - | - | 32.00 to 35.00 | 8x(C+N) to0.60 | Al:0.15 To0.45 |
- Elements not listed in this table shall not be intentionally added to the steel without the agreement of the purchaser except for finishing the cast.All appropriate precautions are to be taken to avoid the addition of such elements from scrap and other materials used in production which would impair mechanical properties and the suitability of the steel.
- For products to be machined a controlled sulphur content of 0.015% to 0.030% is permitted by agreement provided the resistance to corrosion is still satisfied for the intended purpose.
Option3:A sulphur content of 0.015% to 0.030% is specified. - Where for special reasons,e.g. hot workability it is necessary to minimize the deltaferrite content,or with the aim of low permeability,the maximum nickel content may be increased by 0.50%
- Where for special reasons,e.g. hot workability it is necessary to minimize the deltaferrite content,or with the aim of low permeability,the maximum nickel content may be increased by 1.00%
- Where for special reasons,e.g. hot workability it is necessary to minimize the deltaferrite content,or with the aim of low permeability,the maximum nickel content may be increased by 1.50%
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SUPPLEMENTARY REQUIREMENTS
S1 - Stress-Relieved Annealed Tubes
S2 - Minimum Wall Tubes
S3- Air Underwater Pressure Test
S4 - Stabilizing Heat Treatment
S5 - Unstraightened Tubes
S6 - Intergranular Corrosion Test
S7 - Weld Decay Test
S8 - Special Applications
S9 - Additional Tesing of Welding Tubing per ASME Request
Referenced Documents:
ASTM Standards:
ASTM A262 Practices for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steels
ASTM A480/ A480M Specification for General Requirements for Flat-Rolled Stainless and Heat-Resisting Steel Plate, Sheet, and Strip
ASTM A1016/ A1016M Specification for General Requirements for Ferritic Alloy Steel, Austenitic Alloy Steel, and Stainless Steel Tubes
E 112 Test Methods for Determining Average Grain Size
E213 Practice for Ultrasonic Examination of Metal Pipe and Tubing
E273 Practice for Ultrasonic Examination of Weld Zone of Welded Pipe and Tubing
E527 Practice for Numbering Metals and Alloys (UNS)
Product Tags:
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304 316 Welded Austenitic Stainless Steel Tube For Boilers / Heat Exchanger Images
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