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UNS 304 Details
UNS 304 Standard Download
| Category | Type | Grade | Microstructure | Designations |
|---|---|---|---|---|
| Grades | Stainless Steels | 304 | Austenite | USA - UNS , SAE AMS-QQ-S-763B (1998) - Steel, Corrosion Resistant, Bars, Wire, Shapes, and Forgings SAE AMS-T-6845A (1999) - Tubing, Steel, Corrosion-Resistant (S30400), Aerospace Vehicle Hydraulic System 1/8 Hard Condition SAE AMS-T-8506B (1999) - Tubing, Steel, Corrosion-Resistant, (304), Annealed, Seamless and Welded SAE J 2515 (1999) - High temperature materials for exhaust manifolds SAE J 405 (1998) - Chemical compositions of SAE wrought stainless steels SAE J 467 (1968) - Special Purpose Alloys ("Superalloys") SAE J 452 - Chemical compositions, mechanical and physical properties of SAE aluminum casting alloys |
| Elements | Min.（≥） | Max.（≤） | Similar | Remarks |
|---|---|---|---|---|
| C | - | 0.08 | ||
| Si | - | 1.00 | ||
| Mn | - | 2.00 | ||
| P | - | 0.045 | ||
| S | - | 0.03 | ||
| Cr | 18.0 | 20.0 | ||
| Ni | 8.00 | 10.5 | ||
| N | - | 0.10 |
Steel, Corrosion Resistant, Bars, Wire, Shapes, and Forgings
| Proof strength Rp0.2 (MPa) |
Tensile strength Rm (MPa) |
Impact energy KV (J) |
Elongation at fracture A (%) |
Reduction in cross section on fracture Z (%) |
As-Heat-Treated Condition | Brinell hardness (HBW) |
|---|---|---|---|---|---|---|
| 649 (≥) | 564 (≥) | 14 | 44 | 14 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 214 |
| Property | Density kg/dm3 |
Temperature T °C/F |
Specific heat J / kgK |
Thermal conductivity W/mK |
Electric resistance µΩ·cm |
Modulus of elasticity kN/mm2 |
Expansion rate |
|---|---|---|---|---|---|---|---|
| 482 (≥) | 674 (≥) | 22 | 41 | 31 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 341 | |
| Temp. °C/°F |
Creep strain limit (10000h) (Rp1,0) N/mm2 |
Creep rupture strength (10000h) (Rp1,0) N/mm2 |
|||||
| 559 | 938 | 372 |
| Product type | Products | Dimension | Processes | Deliver Status |
|---|---|---|---|---|
| Plates / Sheets | Plates / Sheets | 0.08-200mm(T)*W*L | Forging, hot rolling and cold rolling | Annealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting |
| Steel Bar | Round Bar, Flat Bar, Square Bar | Φ8-1200mm*L | Forging, hot rolling and cold rolling, Cast | Black, Rough Turning, Shot Blasting, |
| Coil / Strip | Steel Coil /Steel Strip | 0.03-16.0x1200mm | Cold-Rolled & Hot-Rolled | Annealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting |
| Pipes / Tubes | Seamless Pipes/Tubes, Welded Pipes/Tubes | OD:6-219mm x WT:0.5-20.0mm | Hot extrusion, Cold Drawn, Welded | Annealed, Solution and Aging, Q+T, ACID-WASHED |
| Grade | Standard | Country | Application |
|---|---|---|---|
| GH3044 | GB | China | Classification and designation for superalloys and high temperature intermetallic materials |
| 18-8 Type 304 | ASME | USA | Steel, corrosion resistant (18-8) plate, sheet and strip |
| 304 | UNS | USA | Steel, Corrosion Resistant, Bars, Wire, Shapes, and Forgings |
| 304 | ASTM | USA | Steel, Corrosion Resistant, Bars, Wire, Shapes, and Forgings |
| 304 | ASME | USA | Steel plate, corrosion resistant, austenitic (UNS S30400, S30403, S31600, S34700, and S34800) |
| A 167 Type 304 | SAE | USA | Stainless and Heat-Resisting Chromium-Nickel Steel Plate, Sheet, and Strip |
| A 182 F 304 | SAE | USA | Standard Specification for Forged or Rolled Alloy and Stainless Steel Pipe Flanges, Forged Fittings, and Valves and Parts for High-Temperature Service |
| A 213 TP304 | SAE | USA | Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger Tubes |
| 304 L | YB | USA | Forged or Rolled Alloy and Stainless Steel Pipe Flanges, Forged Fittings, and Valves and Parts for High-Temperature Service |
| 304L | UNS | USA | Steel, Corrosion-Resistant, Sheet, Strip, and Plate 19Cr - 9.5Ni (304L) Solution Heat Treated |
| 304L | ASME | USA | Tubing, steel, corrosion and heat resistant, for aerospace vehicle hydraulic systems assembled by brazing |
| A 167 Type 304L | SAE | USA | Stainless and Heat-Resisting Chromium-Nickel Steel Plate, Sheet, and Strip |
| A 182 F 304L | SAE | USA | Standard Specification for Forged or Rolled Alloy and Stainless Steel Pipe Flanges, Forged Fittings, and Valves and Parts for High-Temperature Service |
| A 213 TP304L | SAE | USA | Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger Tubes |
| A 240 Type 304L | SAE | USA | Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications |
| A 249 TP304L | SAE | USA | Welded Austenitic Steel Boiler, Superheater, Heat-Exchanger, and Condenser Tubes |
| A 269 TP304L | SAE | USA | Seamless and Welded Austenitic Stainless Steel Tubing for General Service |
| A 270 TP304L | SAE | USA | Seamless and Welded Austenitic Stainless Steel Sanitary Tubing |
| A 276 304L | SAE | USA | Stainless Steel Bars and Shapes |
| A 314 304L | SAE | USA | Stainless Steel Billets and Bars for Forging |
