ASTM A249 Welded Austenitic Steel Boiler, Superheater, Heat-Exchanger, and Condenser Tubes
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Standard: ASTM A249 Material: TP304, TP304L, TP316, TP316L, TP321 Size: OD (15.9-139.8mm) x WT (1.2-13mm) Application: Superheater, Heat Exchanger, etc. |
Chemical Composition:
Mechanical Properties:
Tolerance:
| Material | ASTM A249 Chemical Composition % Max | ||||||||||
| C | Mn | P | S | Si | Cr | Ni | Mo | NB | Nb | Ti | |
| TP304 | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 18.0-20.0 | 8.0-11.0 | … | … | …. | … |
| TP304L | 0.030 | 2.00 | 0.045 | 0.030 | 1.00 | 18.0-20.0 | 8.0-12.0 | … | … | … | … |
| TP316 | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 16.0-18.0 | 10.0-14.0 | 2.00-3.00 | … | … | … |
| TP316L | 0.030 | 2.00 | 0.045 | 0.030 | 1.00 | 16.0-18.0 | 10.0-14.0 | 2.00-3.00 | … | … | … |
| TP321 | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 17.0-19.0 | 9.0-12.0 | … | 0.10 | … | 5(C+N)-0.70 |
Mechanical Properties:
| ASTM A249 Mechanical Properties | ||||||
| Material | Heat treatment | Temperate F(C) Min. | Tensile Strength Ksi (MPa), Min. |
Yield Strength Ksi (MPa), Min. |
Elongation %, Min. | Hardness Max. |
| Rockwell | ||||||
| TP304 | Solution | 1900 (1040) | 75(515) | 30(205) | 35 | 90HRB |
| TP304L | Solution | 1900 (1040) | 70(485) | 25(170) | 35 | 90HRB |
| TP316 | Solution | 1900(1040) | 75(515) | 30(205) | 35 | 90HRB |
| TP316L | Solution | 1900(1040) | 70(485) | 25(170) | 35 | 90HRB |
| TP321 | Solution | 1900(1040)F | 75(515) | 30(205) | 35 | 90HRB |
Tolerance:
| OD Tolerance | WT Tolerance | Length Tolerance | ||
| OD, mm | Tolerance | +/-10% | OD, mm | Length Tolerance |
| <25.4 | ±0.10 | <50.8 | +3/-0 | |
| 25.4 - ≤38.1 | ±0.15 | ≥50.8 | +5/-0 | |
| >38.1 -<50.8 | ±0.20 | |||
| 50.8 -<63.5 | ±0.25 | |||
| 63.5 -<76.2 | ±0.30 | |||
| 76.2 - ≤101.6 | ±0.38 | |||
| >101.6 - ≤190.5 | +0.38/-0.64 | |||
| >190.5 - ≤228.6 | +0.38/-1.14 | |||