The Super 304H (S30432) is an austenitic stainless steel grade, which contains copper. This grade of steel is developed for application in ultra-supercritical boilers. The chemical composition of the S30432 includes around 18% chromium, 9% nickel and small amounts of copper, niobium, nitrogen and boron for enhancing the creep-rupture behavior and allowable stress at high temperatures than that of 304H steel grades. Seamless S30432 boiler pipes are produced for compliance with ASTM A213 / ASME SA213 standard and designed for high pressure superheater and reheater coils applications. S30432 Pipes and Tubes are available in EN 10204 3.1 and can also be used along with hydrostatic and non-destructive tests and hydro tracking. Amardeep Steel supplies S30432 Pipes and Tubes for demanding power-generation applications.
Specifications of S30432 Pipes and Tubes
Attribute | Specification / Standard Value |
|---|---|
UNS Designation | UNS S30432 |
Trade Name | Super 304H / SUPER304H |
EN Designation | 1.4907 / X10CrNiCuNb18-9-3 |
Governing Standard | ASTM A213 / ASME SA-213 (Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger Tubes) |
Code Cases | ASME Code Case 2328 / 2328-1 / 2328-2 |
Product Forms | Cold-drawn or hot-finished seamless tube |
Outside Diameter (OD) | 1/8" to 5" (3.2 mm to 127 mm) |
Wall Thickness | 0.015" to 0.500" (0.4 mm to 12.7 mm) |
Heat Treatment | Solution annealed at 1100°C (2012°F) minimum, followed by rapid cooling in water or air |
Certification | EN 10204 3.1 Material Test Report (MTC), NDT / PMI reports, Grain size verification |
Chemical Compositions of S30432 Pipes and Tubes
Element | Minimum (%) | Maximum (%) |
|---|---|---|
Carbon (C) | 0.07 | 0.13 |
Manganese (Mn) | — | 1.00 |
Silicon (Si) | — | 0.30 |
Phosphorus (P) | — | 0.040 |
Sulfur (S) | — | 0.010 |
Chromium (Cr) | 17.00 | 19.00 |
Nickel (Ni) | 7.50 | 10.50 |
Copper (Cu) | 2.50 | 3.50 |
Niobium (Nb) | 0.30 | 0.60 |
Nitrogen (N) | 0.05 | 0.12 |
Aluminium (Al) | 0.003 | 0.030 |
Boron (B) | 0.001 | 0.010 |
Mechanical Properties of S30432 Pipes and Tubes
Property | Metric Value | Imperial Equivalent | ASTM A213 Minimum |
|---|---|---|---|
Tensile Strength, min. | 590MPa | 86ksi | Required |
Yield Strength (0.2% Offset), min. | 235MPa | 34ksi | Required |
Elongation in 2 in. (50 mm), min. | 35% | 35% | Required |
Hardness, max. | 95HRB | 219HBW | Required |
Physical Properties of S30432 Pipes and Tubes
Property | Temperature / Range | Metric / Imperial Units |
|---|---|---|
Density | 20°C (68°F) | 7.90 g/cm³ (0.285 lb/in³) |
Modulus of Elasticity (E) | 20°C (68°F) | 195 GPa (28.3 × 10⁶ psi) |
Thermal Conductivity | 20°C / 600°C | 14.2 W/m·K / 22.5 W/m·K |
Mean Coefficient of Thermal Expansion | 20°C to 600°C | 18.2 × 10⁻⁶ /K (10.1 × 10⁻⁶ /°F) |
Specific Heat Capacity | 20°C (68°F) | 500 J/kg·K (0.12 Btu/lb·°F) |
Electrical Resistivity | 20°C (68°F) | 0.72 μΩ·m |
Melting Range | Solidus / Liquidus | 1390°C–1420°C (2534°F–2588°F) |
Equivalent Grades of S30432 Pipes and Tubes
System / Region | Standard / Organization | Designation / Code |
|---|---|---|
UNS System | ASTM A213 / ASME SA-213 | UNS S30432 |
ASME Boiler Code | ASME Section II | ASME Code Case 2328 / 2328-1 / 2328-2 |
EN / European Standard | EN 10216-5 | 1.4907 |
EN Chemical Name | EN 10028-7 / EN 10216-5 | X10CrNiCuNb18-9-3 |
Proprietary Trade Names | Nippon Steel / Sumitomo Metal | SUPER304H / DMV304HCu |
Chinese GB Standard | GB 5310-2008 | 10Cr18Ni9NbCu3BN |
Size & Weight Chart of S30432 Pipes and Tubes
Outer Diameter (OD) | Wall Thickness (WT) | Inside Diameter (ID) | Nominal Weight (kg/m) | Weight per 6m Length (kg) |
|---|---|---|---|---|
38.0 mm (1.50") | 6.0 mm (0.236") | 26.0 mm | 4.77 kg/m | 28.62 kg |
42.4 mm (1.67") | 6.3 mm (0.248") | 29.8 mm | 5.65 kg/m | 33.90 kg |
45.0 mm (1.77") | 6.7 mm (0.264") | 31.6 mm | 6.37 kg/m | 38.22 kg |
45.0 mm (1.77") | 9.2 mm (0.362") | 26.6 mm | 8.17 kg/m | 49.02 kg |
50.8 mm (2.00") | 8.0 mm (0.315") | 34.8 mm | 8.50 kg/m | 51.00 kg |
57.0 mm (2.24") | 10.0 mm (0.394") | 37.0 mm | 11.68 kg/m | 70.08 kg |
Applications and Industrial Uses of S30432 Pipes and Tubes
- Ultra-Supercritical Boiler Superheaters
- Boiler Reheater Coils
- High-Pressure Steam Boilers
- Superheater Outlet Headers
- Reheater Outlet Headers
- Power Plant Steam Generation Systems
- High-Temperature Boiler Heat Transfer Components
- Coal-Fired and Gas-Fired Power Plants
Frequently Asked Questions
What are S30432 Pipes and Tubes?
S30432 Pipes and Tubes are copper-bearing austenitic stainless steel products designed for high-temperature boiler and power plant applications.
What is UNS S30432 also known as?
UNS S30432 is commonly known as Super 304H.
What ASTM standards cover S30432 Pipes and Tubes?
S30432 boiler tubes are commonly manufactured to ASTM A213 / ASME SA213 specifications.
Can S30432 withstand temperatures up to 700°C?
Yes. S30432 is designed for high-temperature service and can withstand elevated temperatures in demanding boiler applications, depending on operating conditions.
Why is S30432 used in boiler superheaters and reheaters?
It provides high creep-rupture strength and good steam oxidation resistance at elevated temperatures.
Is S30432 resistant to steam oxidation?
Yes. S30432 offers good resistance to steam oxidation, making it suitable for high-temperature steam and boiler environments.
What is the difference between S30432 and standard 304H?
S30432 (Super 304H) adds copper, niobium, nitrogen and boron to the 304H composition, which raises allowable stress and creep-rupture strength at high temperature compared with standard TP304H.
