S32304 Duplex Steel Plate Hot Rolled with High Yield Strength and Corrosion Resistance
Price:
2.65
MOQ:
50
Delivery Time:
Negotiable
Product Description
S32304 Duplex Steel Plate 1.4362 Stainless Steel Plate
Alloy 2304 (UNS S32304) is a 23% chromium, 4% nickel, molybdenum-free duplex stainless steel. This alloy offers corrosion resistance properties comparable to 316L stainless steel, while providing mechanical properties with yield strength approximately twice that of 304L/316L austenitic grades. These enhanced properties enable significant weight savings in properly designed pressure vessel applications.
Chemical Composition
Typical Values (Weight %)
| Carbon | Chromium | Nickel | Molybdenum | Nitrogen | Others |
|---|---|---|---|---|---|
| 0.020 | 23 | 4 | 0.2 | 0.1 | S=0.001 |
PREN = [Cr%] + 3.3 [Mo%] + 16 [N%] ≥ 24
Mechanical Properties
Tensile Properties (Minimum Values)
| °C | Rp 0.2 MPa | Rp 1.0 MPa | UTS MPa | °F | YS 0.2% Offset KSI | YS 0.1% Offset KSI | UTS KSI | Elongation % |
|---|---|---|---|---|---|---|---|---|
| 20 | 400 | 440 | 600 | 68 | 58 | 64 | 87 | 25 |
| 100 | 330 | 365 | 570 | 212 | 48 | 53 | 83 | 25 |
| 200 | 280 | 310 | 530 | 392 | 41 | 45 | 77 | 20 |
| 300 | 230 | 260 | 490 | 572 | 33 | 38 | 71 | 20 |
Values obtained for hot rolled plates (th ≤ 2"). Alloy 2304 must not be used for extended periods at temperatures exceeding 300°C (572°F) due to precipitation hardening.
Toughness Values (KCV Minimum Values)
| Temperature | -50°C / -60°F | +20°C / +70°F |
|---|---|---|
| Single | 75 J/cm² / 54 ft. lbs | 90 J/cm² / 65 ft. lbs |
| Average (5) | 90 J/cm² / 65 ft. lbs | 150 J/cm² / 87 ft. lbs |
Hardness (Typical Values)
| Average (5) | HV10 | HB | HRC |
|---|---|---|---|
| 180-230 | 180-230 | ≤ 20 |
Physical Properties
Density: 7,800 kg/m³ / 0.28 lb/in³
| Interval Temp °C | Thermal Expansion α×10⁻⁶K⁻¹ | °C | Resistivity (μΩ·cm) | Thermal Conductivity (W·m⁻¹·K⁻¹) | Specific Heat (J·kg⁻¹·K⁻¹) | Young Modulus E (GPa) | Shear Modulus G (GPa) |
|---|---|---|---|---|---|---|---|
| 20-100 | 13 | 20 | 80 | 17 | 450 | 200 | 75 |
| 20-100 | 13 | 100 | 92 | 18 | 500 | 190 | 73 |
| 20-200 | 13.5 | 200 | 100 | 19 | 530 | 180 | 70 |
| 20-300 | 14 | 300 | 105 | 20 | 560 | 170 | 67 |
Microstructure
The chemical composition of Alloy 2304 is optimized to achieve a typical 50% austenite / 50% ferrite microstructure following solution annealing treatment at 950°-1050°C (1742°-1922°F). The microstructure demonstrates exceptional stability compared to molybdenum-containing duplex stainless steels, with intermetallic phases appearing only after 10 hours of holding time in the 750°-850°C (1382°-1562°F) temperature range. Copper additions, when specified, increase hardness after heat treatment in the 350°-500°C (662°-932°F) range.
Processing Guidelines
Hot Forming
Hot forming should be performed within the 1150°-900°C (2100°-1650°F) temperature range. Following forming operations, a new solution annealing treatment at 950°-1050°C (1742°-1922°F) is recommended to fully restore corrosion resistance and mechanical properties. Components formed with Alloy 2304 require careful support during heating to prevent creep deformation.
Cold Forming
Alloy 2304 can be cold formed without complications using the same equipment employed for 304L and 316L grades. Due to its enhanced mechanical properties and higher yield strength, increased forming stresses are necessary. A final solution annealing heat treatment is recommended after cold forming to restore optimal mechanical and corrosion resistance properties.
Descaling
Utilize the same solutions and pastes as for Alloys 304L/316L. Pickling times will be longer than for austenitic grades due to the superior corrosion resistance properties of this alloy.
Machinability
Alloy 2304 duplex stainless steel exhibits improved machinability characteristics, particularly in drilling operations. Its performance is equivalent to 316LEZ*, while offering superior corrosion resistance and cleanliness properties without requiring sulphur additions. This results in enhanced localized corrosion resistance behavior.
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Company
TSING SHAN STEEL INDUSTRIAL LIMITED
Location
NO.288,Youyi Road Xi Shan Dristrict , Wuxi, Jiangsu, China
Contact Person
Gao Ben