ASTM A403 WP304H 90 DEG. SR Elbow Stainless Steel Buttweld Pipe Fittings
ASTM A403 WP304H grade features a higher carbon content (typically between 0.04% and 0.10%) than standard 304 stainless steel, enhancing its strength at elevated temperatures. It can maintain their strength and mechanical properties at temperatures up to around 1000°F (540°C).
They exhibit outstanding resistance to oxidation, corrosion, and pitting, particularly in acidic and chloride environments, making them ideal for critical applications such as chemical processing, oil & gas industrial and marine applications.
ASTM A403 WP304/304L/304H Pipe Fittings Equivalent Grade
| 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 |
| 304L | S30403 | 304S11 | - | 1.4306 | X2CrNi19-11 | 2352 | SUS 304L |
| 304H | S30409 | 304S51 | - | 1.4948 | X6CrNi18-11 | - | - |
ASTM A403 WP304/304L/304H Pipe Fittings Chemical Composition
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N |
| 304 | min.max. | -0.08 | -2.0 | -0.75 | -0.045 | -0.030 | 18.0-20.0 | - | 8.0-10.5 | -0.10 |
| 304L | min. max. | - 0.030 | - 2.0 | - 0.75 | - 0.045 | - 0.030 | 18.0 20.0 | - | 8.0 12.0 | - 0.10 |
| 304H | min. max. | 0.04 0.10 | - 2.0 | - 0.75 | -0.045 | - 0.030 | 18.0 20.0 | - | 8.0 10.5 | - |
ASTM A403 WP304/304L/304H Pipe Fittings Mechanical Properties
| 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. |
ASTM A403 WP304/304L/304H Pipe Fittings 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/L/H | 8000 | 193 | 17.2 | 17.8 | 18.4 | 16.2 | 21.5 | 500 | 720 |
Other available materials:
Nickel Alloy
ASTM / ASME SB 336 UNS 2200 ( NICKEL 200 ), UNS 2201 (NICKEL 201 ), UNS 4400 (MONEL 400 ), UNS 8020 ( ALLOY 20 / 20 CB 3, UNS 8825 INCONEL (825), UNS 6600 (INCONEL 600 ), UNS 6601 ( INCONEL 601 ), UNS 6625 (INCONEL 625), UNS 10276 ( HASTELLOY C 276 )
Stainless Steel
ASTM / ASME SA 403 GR WP "S" / "W" / " WX" 304 , 304L, 304H, 304N, 304LN, 309, 310H, 316, 316H, 317, 317L, 321, 321H, 347, 347 H.
Duplex Steel
ASTM / ASME SA 815 UNS NO.S 31803, S 32205, S 32550, S 32750, S 32760.
Carbon Steel
ASTM / ASME A 234 WPB, WPC
ASTM / ASME A 860 WPHY 42, WPHY 46, WPHY 52, WPH 60, WPHY 65 & WPHY 70.
Alloy Steel
ASTM / ASME A 234 WP 1, WP 5, WP 9, WP 11, WP 12, WP 22, WP 23, WP 91
Application
- Chemical processing
- Power generation
- Oil & gas industries
- Marine engineering
- Industrial equipment
- Piping System
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ASTM A403 WP304H Stainless Steel Buttweld Pipe Fitting 90 Degree SR Elbow Images
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