Bright Annealed Welded Stainless Steel Tubing ASTM A249 / A249M TP304L For Boiler
Stainless Steel Tubing ASTM A249 / A249M TP304L TP316L TP304 Heat Exchanger Tube Bright Annealed Welded Tube
Product Standard: ASTM A249 / A249M Standard Specification for Welded Austenitic Steel Boiler, Superheater Heat-Exchanger, and Condenser Tubes.
Main steel grades: TP304L TP316L TP304
Application: Boiler, Superheater Heat-Exchanger, and Condenser Tubes.
Chemical Composition & Mechanical Properties:
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | |
| 304 | min.max. | -0.08 | -2.0 | -0.75 | -0.045 | -0.03 | 18.0-20.0 | - | 8.0--10.5 | -0.10 |
| 304L | min.max. | -0.030 | -2.0 | -0.75 | -0.045 | -0.03 | 18.0-20.0 | - | 8.0--12.0 | -0.10 |
| 304H | min.max. | 0.04-0.10 | -2.0 | -0.75 | -0.045 | -0.03 | 18.0-20.0 | - | 8.0--10.5 | - |
| 316L | -0.03 | -2.0 | -1.0 | -0.045 | -0.03 | 16.0-18.0 | - | 10.0-14.0 | - | |
| Grade | Tensile Strength(MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) min | Hardness | |
| Rockwell B (HR B) max | Brinell (HB) max | ||||
| 304 | 515 | 205 | 40 | 92 | 201 |
| 304L | 485 | 170 | 40 | 92 | 201 |
| 304H | 515 | 205 | 40 | 92 | 201 |
| 304H also has a requirement for a grain size of ASTM No 7 or coarser. | |||||
Mark: As required.
Inspection and Test: chemical composition test, mechanical properties test(tensile, yield, elongation), process properties test(flatting, flaring, bending, hardness, impact, etc.), appearance and size test, non-destructive inspection test, hydrostastic test.
Delivery status: Annealed, normalized, normalized+Tempered, etc.
Surface treatment: oil impregnation, paint, passivation, phosphating, shot blasting etc.
Packing: Exporting package/wooden box /as requirement.
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