Overview
YUHONG Groupo is one of the large suppliers for high quality ASTM A249 / ASME SA249 Tube. Our ASTM A249 Tubing Specification for nominal-wall-thickness welded tube and heavily cold worked welded tube made from the austenitic steels with various grades intended for such use as a heat exchanger, boiler, superheater or condenser tube.
ASME SA249 material shall conform to the prescribed tensile and hardness properties such as yield strength, tensile strength, elongation and Rockwell hardness number. Also, each ASTM A249 Tubing, astm a249 tube undergo mechanical tests such as flattening test, tension test, flange test, reverse-bend test, hardness test, and hydrostatic or nondestructive electric test.
Chemical Composition Of SA 249 TP304 Tube
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | |
| 304 | min. | – | – | – | – | – | 18.0 | – | 8.0 | – |
| max. | 0.08 | 2.0 | 0.75 | 0.045 | 0.030 | 20.0 | 10.5 | 0.10 | ||
ASTM A249 TP304 Tube Physical Properties
| Grade | Density (kg/m3) | Elastic Modulus (GPa) | Mean Coefficient of Thermal Expansion (μm/m/°C) | Thermal Conductivity (W/m.K) | Specific Heat 0-100°C (J/kg.K) | Electrical Resistivity (nΩ.m) | |||
| 0-100°C | 0-315°C | 0-538°C | at 100°C | at 500°C | |||||
| 304 | 8000 | 193 | 17.2 | 17.8 | 18.4 | 16.2 | 21.5 | 500 | 720 |
Equivalent Grade Of TP304
| Grade | UNS No | Old British | Euronorm | Swedish SS | Japanese JIS | ||
| BS | En | No | Name | ||||
| 304 | S30400 | 304S31 | 58E | 1.4301 | X5CrNi18-10 | 2332 | SUS 304 |
| ASTM A249 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 |
Applications
-Common industrial services (Petroleum, chemical, paper, fertilizer, fabric, aviation and nuclear)
-Fluid, gas and oil industry
-Heat transmission and pressure service
-Construction and ornamental
-Boilers and Heat exchangers system
-Decoration purpose, boiler, auto parts, medical device, food industry, building materials)
