Heat Resistant UNS N08810 Stainless Steel Bar Alloy 800H Diameter 10-350mm Hot Rolled & Forged
Price:
Negotiable
MOQ:
100 kg
Delivery Time:
Negotiable
Product Description
UNS N08810 Heat Resistant Stainless Steel Bar Alloy 800H
Premium austenitic nickel-iron-chromium alloy bars engineered for high-temperature industrial applications. Available in diameters from 10mm to 350mm as hot rolled and forged bars.
Product Specifications
| Standard | AISI, ASTM, BS, DIN, GB, JIS |
|---|---|
| Grade | Monel series: 400 K500 Inconel series: 600 601 625 718 725 Incoloy series: 800 800H 825 925 Hastelloy series: B,B2,B3,C,C-276,C-4,C-22 Pure: Ni200, Ni201 |
| Specifications |
Round bar: Diameter: 4-300mm Flat bar: Thickness: 1.0-100mm, Width: 1-1500mm Square bar: Size: 4×4-100×100mm Length: 2m, 5.8m, 6m, or as required |
| Surface | Black, peeled, polishing, bright, sand blast, hair line, etc. |
| Price Term | Ex-work, FOB, CFR, CIF, etc. |
| Delivery Time | Standard size in stock, prompt delivery or as per order quantity |
Material Description
UNS N08810 (Alloy 800H) stands as the backbone of high-temperature industrial applications, engineered to thrive in environments where ordinary steel succumbs to softening, corrosion, and structural failure. Our hot-rolled and forged bars deliver unmatched stability and durability for critical industrial components.
Core Chemical Composition
| Element | Content Range (%) | Key Function |
|---|---|---|
| Nickel (Ni) | 30.0 - 35.0 | Maintains austenitic matrix stability; prevents embrittlement at high temperatures |
| Chromium (Cr) | 19.0 - 23.0 | Forms dense CrO oxide film; resists oxidation and high-temperature corrosion |
| Iron (Fe) | Balance | Reduces material cost while preserving processability |
| Carbon (C) | 0.05 - 0.10 | Enhances creep and rupture strength via carbide formation |
| Aluminum (Al) | 0.15 - 0.60 | Forms γ' strengthening phase with titanium; boosts high-temperature hardness |
| Titanium (Ti) | 0.15 - 0.60 | Works with Al to reinforce microstructure |
| Manganese (Mn) | ≤1.50 | Acts as deoxidizer; minimizes residual impurities |
| Sulfur (S) | ≤0.015 | Strictly controlled to avoid hot working defects |
| Phosphorus (P) | ≤0.030 | Limited to prevent brittleness in high-temperature service |
Mechanical Properties
| Performance Metric | Room Temperature (Min.) | At 800°C (Min.) |
|---|---|---|
| Tensile Strength (Rm) | 450 MPa | 200 MPa |
| Yield Strength (Rp0.2) | 180 MPa | 100 MPa |
| Elongation (A5) | 35% | 25% |
| Density | 7.9 g/cm³ | 7.8 g/cm³ |
| Melting Point | 1300 - 1350°C | - |
Hot Rolled vs. Forged Bars
| Feature | Hot Rolled Bars | Forged Bars |
|---|---|---|
| Processing Method | Continuous rolling at 1100-1200°C | Precision forging with controlled plastic deformation |
| Surface Finish | Black oxide scale (can be lightly ground) | Smooth, often turned/ground; minimal surface defects |
| Dimensional Tolerance | ±0.5mm | ±0.2mm |
| Microstructure | Coarse but uniform austenitic grains | Refined grain structure; eliminated internal porosity |
| Key Advantages | Cost-effective; efficient for standard applications | Superior creep resistance; uniform transverse/longitudinal strength |
| Ideal Applications | Flanges, valves, non-critical shafts | High-pressure turbine components, nuclear reactor parts |
Performance Advantages
Exceptional High-Temperature Stability
Operates continuously at 600-1000°C with short-term resistance up to 1100°C. Prevents thermal softening and phase transformations.
Operates continuously at 600-1000°C with short-term resistance up to 1100°C. Prevents thermal softening and phase transformations.
Superior Corrosion Resistance
High chromium content forms self-healing oxide layer protecting against industrial flue gases, steam, and sulfur-containing media.
High chromium content forms self-healing oxide layer protecting against industrial flue gases, steam, and sulfur-containing media.
Reliable Creep Resistance
Optimized carbon and Al+Ti content deliver exceptional resistance to plastic deformation under sustained heat and stress.
Optimized carbon and Al+Ti content deliver exceptional resistance to plastic deformation under sustained heat and stress.
Excellent Processability
Maintains good weldability and machinability despite high performance. Post-weld heat treatment enhances joint strength.
Maintains good weldability and machinability despite high performance. Post-weld heat treatment enhances joint strength.
Typical Applications
- Energy/Nuclear: High-temperature steam pipes, reactor auxiliary components, boiler superheaters
- Petrochemical: Ethylene production, high-temperature reaction vessels, catalytic reformer tubes
- Metallurgy: Heat treatment furnace radiating tubes, annealing components
- Oil & Gas: Downhole high-temperature pipes, wellhead equipment
Quality Assurance & Compliance
- Chemical composition analysis (spectrometric testing)
- Mechanical property verification (tensile, impact testing)
- Non-destructive inspection (ultrasonic testing per ASTM A388)
- Dimensional accuracy verification
- ISO 9001-certified Material Test Certificates (MTC)
Customization Options
- Diameters: 10mm to 350mm (custom sizes available)
- Lengths: 3-6m random lengths or fixed lengths up to 12m
- Surface Treatments: Black oxide, ground, or bright finish
- Delivery Condition: Solution-annealed (standard) or as-specified heat treatment
Whether for routine industrial use or mission-critical applications, our UNS N08810 Alloy 800H round bars deliver the reliability and performance required in the world's harshest high-temperature environments. Contact us for material certificates, technical data sheets, or customized quotations.
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Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.
Company
JIANGSU MITTEL STEEL INDUSTRIAL LIMITED
Location
No.283-1, Youyi Middle Road, Xishan District, Wuxi City, Jiangsu Province
Contact Person
Gao Ben