Womic Stainless Steel Co., Ltd
Material & Grade
Material Name: NAS 800
Equivalent Grades: Alloy 800
UNS Number: N08800
Alloy Type: Nickel-Chromium-Iron Solid Solution Strengthened Alloy
Production size of Incoloy Alloy 800 Seamless &Welded Pipes / Tubes:
|
Parameter |
Range |
|
Outside Diameter (OD) |
6 mm – 114 mm(1/4” – 4.5”) |
|
Wall Thickness (WT) |
0.5 mm – 12 mm |
|
Length |
Up to 12 meters(customizable) |
|
Tolerance |
As per ASTM B407 / B514 |
|
Form |
Round tube / U-tube / Coiled tube |
Production size ofIncoloy Alloy 800 Plates / Sheets / Strips
|
Parameter |
Range |
|
Thickness |
0.5 mm – 50 mm |
|
Width |
Up to 2000 mm |
|
Length |
Up to 6000 mmor customized |
|
Standards |
ASTM B409 / EN 10028-2 / ISO 6208 |
|
Surface Finish |
2B / BA / No.1 / Brushed / Pickled |
Production size ofIncoloy Alloy 800 Round Bars / Rods
|
Parameter |
Range |
|
Diameter |
6 mm – 300 mm |
|
Length |
1 m – 6 m,or cut to length |
|
Type |
Hot-rolled,Cold-drawn,Peeled |
|
Standard |
ASTM B408 |
Incoloy Alloy 800 Fittings &Flanges
|
Type |
Availability |
|
Elbow / Tee / Reducer |
SCH10 to SCH160,ANSI/ASME B16.9 |
|
Flanges |
Weld neck / Slip-on / Blind (1/2” – 24”) |
|
Standards |
ANSI B16.5 / B16.47 / DIN / JIS |
Incoloy Alloy 800 standard
|
Form |
ASTM Specification |
ASME Specification |
|
Plate,Sheet,Strip |
ASTM B409 |
ASME SB-409 |
|
Pipe (Seamless) |
ASTM B407 |
ASME SB-407 |
|
Pipe (Welded) |
ASTM B514 |
ASME SB-514 |
|
Tube (Seamless) |
ASTM B163 |
ASME SB-163 |
|
Fittings |
ASTM B366 |
ASME SB-366 |
|
Forgings |
ASTM B564 |
ASME SB-564 |
ASTM B407 – Seamless Nickel-Iron-Chromium Alloy Pipes & Tubes
ASTM B514 – Welded Nickel Alloy Pipes
ASME SB407 / SB514
ASTM B564 – Alloy Steel Fittings
ASTM B366 – Nickel Alloy Pipe Fittings
ASTM B462 – Alloy Steel Flanges
EN / ISO / DIN / JIS – Available upon request
What is the Difference Between INCOLOY 800 and Alloy 800?
|
Aspect |
Incoloy 800 |
Alloy 800 |
|
Branding |
Trademarked name by Special Metals |
Generic name used globally |
|
Material Specification |
Identical |
Identical |
|
Standards |
ASTM B407,B408,B409,ASME SB |
Same |
|
Composition |
Same |
Same |
|
Market Use |
Branded in critical applications |
Generic usage |
Incoloy Alloy 800NAS 800
(UNS N08800)Chemical Composition
Incoloy Alloy 800NAS 800 (UNS N08800)is
a nickel-iron-chromium alloy with controlled carbon,aluminum,and titanium
content for enhanced high-temperature properties.
|
Element ofNAS 800 (UNS N08800) |
Composition (% by Weight) |
|
Nickel (Ni) |
30.0 - 35.0 |
|
Chromium (Cr) |
19.0 - 23.0 |
|
Iron (Fe) |
Balance (39.5 min) |
|
Carbon (C) |
0.10 max |
|
Aluminum (Al) |
0.15 - 0.60 |
|
Titanium (Ti) |
0.15 - 0.60 |
|
Manganese (Mn) |
1.50 max |
|
Silicon (Si) |
1.00 max |
|
Sulfur (S) |
0.015 max |
|
Copper (Cu) |
0.75 max |
IncoloyAlloy
800 Mechanical Properties of NAS 800 (UNS N08800) Pipes & Tubes
Incoloy Alloy 800 exhibits excellent mechanical
properties,making it suitable for high-temperature and corrosive environments.
|
PropertyNAS 800 (UNS N08800) Pipes & Tubes |
Value |
|
Tensile Strength (min) |
520 MPa (75 ksi) |
|
Yield Strength (0.2% offset,min) |
205 MPa (30 ksi) |
|
Elongation (min) |
30% |
|
Hardness (Brinell,max) |
200 |
|
Density |
7.94 g/cm3 |
|
Melting Range |
1357 - 1385°C /2475-2525°F |
Note:Properties may vary based on heat treatment and product form.
Chemical Composition Analysis
Tensile Test
Flattening / Flaring Test
Hydrostatic Test
Eddy Current Test / Ultrasonic Test (UT)
PMI (Positive Material Identification)
Dimensional & Visual Inspection
EN 10204 3.1 Mill Test Certificate
Alloy 800 (NAS 800, UNS N08800) exhibits excellent weldability and can be welded using conventional welding processes while maintaining high-temperature strength and corrosion resistance.
Recommended Welding Methods
Gas Tungsten Arc Welding (GTAW / TIG)
Gas Metal Arc Welding (GMAW / MIG)
Shielded Metal Arc Welding (SMAW)
These welding processes provide sound weld joints with good mechanical properties when proper parameters are applied.
Filler Metal Selection
GTAW / GMAW: ERNiCr-3 (Inconel® 82)
SMAW: ENiCrFe-3 (Inconel® 182)
These filler metals ensure good metallurgical compatibility, corrosion resistance, and high-temperature performance.
Pre-Weld Preparation
Thoroughly clean all joint surfaces to remove oil, grease, moisture, paint, and oxide films.
Use stainless steel wire brushes or approved chemical cleaning methods to prevent contamination.
Welding Parameters
Apply low to moderate heat input to minimize grain growth in the heat-affected zone (HAZ).
Maintain controlled interpass temperatures to preserve corrosion resistance and mechanical stability.
Use stringer beads rather than wide weave beads for better weld quality.
Post-Weld Heat Treatment
Post-weld heat treatment (PWHT) is generally not required for Alloy 800.
For critical or highly stressed applications, stress-relief annealing at approximately 870°C (1600°F) may be performed if specified by design codes or service conditions.
Alloy 800 (NAS 800 / UNS N08800) is widely used in heating element and high-temperature furnace applications due to its excellent resistance to oxidation, carburization, and nitridation, combined with stable mechanical properties at elevated temperatures.
Typical Applications
Industrial Furnaces:
Suitable for continuous service temperatures up to 1100°C (2000°F) in oxidizing environments.
Electric Heating Elements:
Offers excellent resistance to carburizing and nitriding atmospheres.
Petrochemical Processing Equipment:
Commonly used in reformer tubes, cracking furnaces, and heat transfer systems due to its superior creep and rupture strength.
Specifications for Heating Element Applications
Custom Manufacturing:
Diameters, wall thicknesses, lengths, and coil configurations can be customized to meet specific furnace or heater designs3. Applications
NAS 800 (UNS N08800) alloy steel pipes are widely applied in:
Petrochemical & Chemical Processing Plants
Heat Exchangers & Condensers
Ethylene Cracking Furnaces
Power Generation Systems
High-Temperature Pressure Vessels
Thermal Processing Equipment
Oil & Gas Refining Units
Industrial Furnace Tubes
Nuclear & Energy Industry
The alloy provides excellent resistance to oxidation, carburization, nitridation, and stress rupture at elevated temperatures.
20+ years manufacturing & export experience
Full range supply: pipes, tubes, fittings, flanges
Strict quality control & international inspection
Customized dimensions and specifications available
Stable global exports to Europe, Middle East, Asia & America
Competitive pricing with reliable delivery schedule
Raw Material Melting (AOD / VIM)
Hot Extrusion / Piercing
Cold Drawing / Cold Rolling
Solution Annealing & Heat Treatment
Straightening & Precision Cutting
Non-Destructive Testing
Final Inspection & Certification
Plastic caps on pipe ends
Individual wrapping with protective film
Wooden cases / plywood boxes
Steel bundles with anti-rust treatment
Seaworthy export packing as per customer requirements
Shipping Methods:
Container Shipping
Break Bulk Shipping
Air Freight (urgent orders)
Incoterms: FOB, CFR, CIF, DDP
Ports: Shanghai, Tianjin, Qingdao or customized
Womic Steel – Professional Nickel Alloy Pipe Manufacturer & Supplier
For NAS 800 (UNS N08800) alloy steel pipes, tubes, fittings and flanges, please contact us for technical consultation, datasheets and competitive quotations.
Email: sales@womicsteel.com
Website: www.womicsteel.com
