JIANGSU MITTEL STEEL INDUSTRIAL LIMITED
| Payment Terms | L/C, T/T, Western Union |
| Supply Ability | 3 Ton per week |
| Delivery Time | 5 - 12 days based on the quantity |
| Packaging Details | standard packing for export |
| Products | Incoloy 800H round bar |
| Grade | incoloy 800H |
| Diameter | 10 - 350mm |
| Length | custom cutting any length as request |
| Standard | ASTM EN |
| Service | Cutting |
| Loading Port | Shanghai Port |
| Surface | black, bright |
| Brand Name | DELTA |
| Model Number | incoloy 800H |
| Certification | ISO |
| Place of Origin | China |
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UNS N08810 Nickel Alloy Plate Sheet Alloy 800H / 800HT
Product Specification
| Payment Terms | L/C, T/T, Western Union | Supply Ability | 3 Ton per week |
| Delivery Time | 5 - 12 days based on the quantity | Packaging Details | standard packing for export |
| Products | Incoloy 800H round bar | Grade | incoloy 800H |
| Diameter | 10 - 350mm | Length | custom cutting any length as request |
| Standard | ASTM EN | Service | Cutting |
| Loading Port | Shanghai Port | Surface | black, bright |
| Brand Name | DELTA | Model Number | incoloy 800H |
| Certification | ISO | Place of Origin | China |
Products Specification
| 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 is in stock,prompt delivery or as order's quantity. | ||
UNS N08810 Heat Resistant Stainless Steel Bar Alloy 800H Diameter 10 - 350mm Hot Rolled & Forged Bars
As a premium austenitic nickel-iron-chromium alloy bar, UNS N08810 (commercially known as Alloy 800H) stands out 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 UNS N08810 round bars—available in diameters from 10mm to 350mm—deliver unmatched stability and durability for critical industrial components.
Core Chemical Composition: The Foundation of High-Temperature Performance
The exceptional properties of UNS N08810 originate from its precisely controlled chemical formulation, which adheres to international standards such as ASTM B408 and ASME SB408. Every batch undergoes rigorous testing to ensure component ratios meet strict tolerances, directly contributing to its heat resistance and structural integrity.
| 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 Cr₂O₃ 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 (critical 区别 from standard Alloy 800) |
| 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; Al+Ti sum controlled at 0.85-1.20% |
| Manganese (Mn) | ≤1.50 | Acts as deoxidizer; minimizes residual impurities |
| Sulfur (S) | ≤0.015 | Strictly controlled to avoid hot working defects and performance degradation |
| Phosphorus (P) | ≤0.030 | Limited to prevent brittleness in high-temperature service |
What distinguishes UNS N08810 is its ability to retain mechanical strength under extreme thermal stress—a critical advantage for components operating in cyclic or sustained high-temperature conditions. Our hot-rolled and forged bars maintain consistent performance from room temperature to 1100°C.
| 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 | - |
We offer two primary processing options to match diverse industrial requirements, each optimized for specific performance priorities and cost considerations.
| 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 炉管,turbine components, nuclear reactor parts |
Engineered to operate continuously at 600-1000°C (with short-term resistance up to 1100°C), UNS N08810 resists thermal softening that plagues conventional stainless steels. Its stabilized austenitic structure prevents phase transformations even after thousands of hours of high-heat exposure.
The high chromium content forms a self-healing oxide layer that protects against industrial flue gases, high-temperature steam, and sulfur-containing media. It also resists carburization in carbon-rich environments, avoiding embrittlement and structural failure.
Optimized carbon and Al+Ti content deliver exceptional resistance to creep—slow plastic deformation under sustained heat and stress—making it ideal for long-service-life components like boiler tubes and heat exchanger .
Despite its high performance, UNS N08810 maintains good weldability (with matching high-nickel-chromium electrodes) and machinability. Post-weld heat treatment enhances joint strength to match base material properties.
Our UNS N08810 round bars are trusted in industries where failure is not an option:
Energy/Nuclear: High-temperature steam pipes, reactor auxiliary components, boiler superheaters
Petrochemical: Ethylene ,high-temperature reaction vessels, catalytic reformer tubes
Metallurgy: Heat treatment furnace radiating tubes, annealing 炉 components
Oil & Gas: Downhole high-temperature pipes, wellhead equipment
All bars undergo strict quality control, including:
Chemical composition analysis (spectrometric testing)
Mechanical property verification (tensile, impact testing)
Non-destructive inspection (ultrasonic testing per ASTM A388)
Dimensional accuracy verification
Supply with ISO 9001-certified Material Test Certificates (MTC)
Diameters: 10mm to 350mm (custom sizes available upon request)
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.
Company Details
Business Type:
Manufacturer,Distributor/Wholesaler,Exporter
Total Annual:
>1000000
Employee Number:
>100
Ecer Certification：
Verified Supplier
Our company is located in Wuxi City, China, we are a stainless steel plate, seamless steel pipe, round steel, steel belt, decorative pipe and other products distribution wholesale private enterprise. Our company operates stainless steel plate, seamless steel pipe, round steel, steel belt, decorative... Our company is located in Wuxi City, China, we are a stainless steel plate, seamless steel pipe, round steel, steel belt, decorative pipe and other products distribution wholesale private enterprise. Our company operates stainless steel plate, seamless steel pipe, round steel, steel belt, decorative...
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