Corrosion Resistance Stainless Steel Flat Bar ASTM A276 TP304 Austenitic
Corrosion Resistance Stainless Steel Flat Bar ASTM A276 TP304 Austenitic
What does ASTM A276 mean?
The ASTM A276 specification is for hot-finished or cold-finished stainless-steel bars except for bars for reforging. This includes round squares, hexagons, and hot-rolled or extruded shapes such as angles, tees and channels that are commonly used types of stainless steel.
Bars shall be furnished in one of the following conditions:
1 Condition A — Annealed.
2 Condition H — Hardened and tempered at a relatively low temperature.
3 Condition T — Hardened and tempered at a relatively high temperature.
4 Condition S — Strain Hardened–Relatively light cold work.
5 Condition B — Relatively severe coldwork.
Stainless Steel 304 and stainless steel 304L are formed with a combination of nickel-chromium-carbon, both are used as general stainless steel with standard resistance to most corrosive environments as well as to organic and inorganic chemicals and to food and drinks.
A276 TP304/L/H Chemical Compositions
| Grade | C |
Mn |
Si | P | S | Cr | Ni | N |
| SS 304 | 0.08 max | 2 max | 0.75 max | 0.045 max | 0.030 max | 18 – 20 | 8 – 11 | - |
| SS 304L | 0.035 max | 2.0 max | 1.0 max | 0.045 max | 0.03 max | 18 – 20 | 8 – 13 | - |
| SS 304H | 0.10 max | 2.0 max | 0.75 max | 0.045 max | 0.03 max | 18 – 20 | 8 – 10.5 | - |
A276 TP304/L/H Mechanical Properties
| Grade | Tensile Strength ksi (min) | Yield Strength 0.2% ksi (min) | Elongation % | Hardness (Brinell) MAX | Hardness (Rockwell B) MAX |
| 304 | 75 | 30 | 40 | 201 | 92 |
| 304L | 70 | 25 | 40 | 201 | 92 |
| 304H | 75 | 30 | 40 | 201 | 92 |
A276 TP304/L/H Physical Properties
| SS 304/304L | ||||||
| Density lbm/in3 | Thermal Conductivity (BTU/h ft. °F) | Electrical Resistivity (in x 10-6) | Modulus of Elasticity (psi x 106 | Coefficient of Thermal Expansion (in/in)/°F x 10-6 | Specific Heat BTU/lbm -°F | Melting Range(°F) |
| at 68°F: 0.285 | 9.4 at 212°F | 28.3 at 68°F | 28 | 9.4 at 32 – 212°F | 0.1200 at 68°F to 212°F | 2500 to 2590 |
| 12.4 at 932 °F | 39.4 at 752°F | 10.2 at 32 – 1000°F | ||||
| 49.6 at 1652 °F | 10.4 at 32 – 1500°F | |||||
| SS 304H | ||||||
| Density lbm/in3 | Thermal Conductivity (BTU/h ft. °F) | Electrical Resistivity (in x 10-6) | Modulus of Elasticity (psi x 106 | Coefficient of Thermal Expansion (in/in)/°F x 10-6 | Specific Heat BTU/lbm -°F | Melting Range(°F) |
| at 68 °F | at 68 – 212°F | at 68 – 1600°F | at 212°F | at 932°F | at 32 – 212°F | in tension (E) |
| 0.285 | 9.2 | 11 | 9.4 | 12.4 | 0.12 | 29 x 106 |
STAINLESS STEEL FLAT BAR TOLERANCE: ASTM A276/A484M
| Width (MM) | THICKNESS TOLERANCE OF THICKNESS (MM) | WIDTH TOLERANCE (MM) | ||
| 3.2 to 13 | Over 13 to 25 | Over 25 to 50 | ||
| UP TO 25 | +-0.20 | +-0.25 | - | +-0.40 |
| OVER 25 TO 50 | +-0.30 | +-0.40 | +-0.80 | +-0.80 |
| OVER 50 TO 100 | +-0.40 | +-0.50 | +-0.80 | +1.60-0.80 |
| OVER 100 TO 150 | +-0.40 | +-0.50 | +-0.80 | +2.40-1.60 |
Applications
-Oil & Gas Industrires
-Chemical Industries
-Construction Industries
-In Offshore Pipelines, Pipe Works
-Petrochemical Industry
-Shipbuilding Industries
-Hydraulic Applications
-Piping Systems
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