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UNS 304H Details
UNS 304H Standard Download
| Category | Type | Grade | Microstructure | Designations |
|---|---|---|---|---|
| Grades | Stainless Steels | 304H | Austenite | USA - UNS , SAE J 405 (1998) - Chemical compositions of SAE wrought stainless steels |
| Elements | Min.（≥） | Max.（≤） | Similar | Remarks |
|---|---|---|---|---|
| C | 0.04 | 0.10 | ||
| Si | - | 1.00 | ||
| Mn | - | 2.00 | ||
| P | - | 0.04 | ||
| S | - | 0.03 | ||
| Cr | 18.0 | 20.0 | ||
| Ni | 8.00 | 11.0 |
| 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) |
|---|---|---|---|---|---|---|
| 443 (≥) | 711 (≥) | 23 | 21 | 14 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 111 |
| 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 |
|---|---|---|---|---|---|---|---|
| 542 (≥) | 387 (≥) | 44 | 43 | 11 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 244 | |
| Temp. °C/°F |
Creep strain limit (10000h) (Rp1,0) N/mm2 |
Creep rupture strength (10000h) (Rp1,0) N/mm2 |
|||||
| 494 | 158 | 977 |
| 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 |
|---|---|---|---|
| 304H | UNS | USA | Chemical compositions of SAE wrought stainless steels |
| A 182 F 304H | 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 TP304H | SAE | USA | Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger Tubes |
| A 240 Type 304H | SAE | USA | Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications |
| A 249 TP304H | SAE | USA | Welded Austenitic Steel Boiler, Superheater, Heat-Exchanger, and Condenser Tubes |
| A 271 TP304H | SAE | USA | Seamless Austenitic Chromium-Nickel Steel Still Tubes for Refinery Service |
| A 312 TP304H | SAE | USA | Seamless, Welded, and Heavily Cold Worked Austenitic Stainless Steel Pipes |
| A 336 Grade F304H | SAE | USA | Alloy Steel Forgings for Pressure and High-Temperature Parts |
| A 358 304H | SAE | USA | Electric-Fusion-Welded Austenitic Chromium-Nickel Stainless Steel Pipe for High-Temperature Service and General Applications |
| A 376 TP304H | SAE | USA | Seamless Austenitic Steel Pipe for High-Temperature Central-Station Service |
| A 403 CR304H | SAE | USA | Standard Specification for Wrought Austenitic Stainless Steel Piping Fittings |
| A 403 WP 304H | SAE | USA | Standard Specification for Wrought Austenitic Stainless Steel Piping Fittings |
| A 430 FP 304H | SAE | USA | Austentic Steel Forged and Bored Pipe for Hi GH-Temperature Service |
| A 452 TP304H | SAE | USA | Centrifugally Cast Austenitic Steel Cold-Wrought Pipe for High-Temperature Service |
| A 240 S30409 | SAE | USA | Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications |
| A 249 S30409 | SAE | USA | Welded Austenitic Steel Boiler, Superheater, Heat-Exchanger, and Condenser Tubes |
| A 358 S30409 | SAE | USA | Electric-Fusion-Welded Austenitic Chromium-Nickel Stainless Steel Pipe for High-Temperature Service and General Applications |
| A 813 S30409 | SAE | USA | Single- or Double-Welded Austenitic Stainless Steel Pipe |
| A 814 S30409 | SAE | USA | Cold-Worked Welded Austenitic Stainless Steel Pipe |
| A 965 S30409 | SAE | USA | Steel Forgings, Austenitic, for Pressure and High Temperature Parts |
