ASTM B407 Incoloy 800 Seamless Pipe
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Why are more and more engineering projects choosing ASTM B407 Incoloy 800 seamless pipes over conventional stainless steel in high-temperature, oxidative, and complex media environments? The answer lies in their superior high-temperature stability, oxidation resistance, and long-term microstructural reliability-significantly reducing the risk of equipment failure.
Our ASTM B407 Incoloy 800 Seamless Pipe is specifically designed for high-temperature and demanding service conditions, offering excellent resistance to oxidation, carburization, and nitridation. The alloy contains Ni 30–35%, Cr 19–23%, with Fe as the balance, along with trace additions of Al and Ti to stabilize the microstructure. In terms of grain size control, through precise hot working and solution annealing processes, we maintain the grain size within ASTM No. 5–8, ensuring both high-temperature strength and enhanced creep and fatigue resistance.
All pipes are supplied in the solution annealed condition, typically within a temperature range of 980–1150°C. This ensures complete dissolution of carbides and a uniform microstructure, significantly improving long-term stability under elevated temperatures.
We effectively address common customer challenges such as high-temperature oxidation failure, inconsistent material performance, welding cracking, and insufficient service life. According to actual application data, under the same operating conditions, the service life of Incoloy 800 seamless alloy pipes can be increased by more than 30%, significantly reducing maintenance frequency and downtime, and enabling safer and more efficient long-term operation.
incoloy 800 vs 800H vs 800HT
Incoloy 800H and 800HT are engineered for high-temperature creep strength by using high-temperature annealing to produce a coarse grain size (ASTM 5 or coarser), whereas standard Incoloy 800 does not have a specified, controlled grain size. 800H/HT prioritize large grains to reduce grain boundaries, increasing resistance to creep and rupture.
Incoloy 800 Pipe Grade Standard and Specification
| Grades | 800 | 800H | 800HT |
|---|---|
| Standard | ASTM B407/ ASME SB407 |
| Sizes | 15" NB TO 150" NB Inner Diameter of Pipes |
| Form | Hydraulic, Square, Rectangular, Round Etc. |
| End | Supplier in Screwed, Beveled, Threaded, Plain |
| Type | Welded | CDW | ERW | DOM | Seamless | Fabricated | CEW | LSAW |
| Length | Single Random, Double Random, Cut to length |
| Surface Finish | 2B, No.1, No.4, No.8 Mirror Finish |
| Schedule Thickness Ranges | SCH XS, SCH 40, SCH 80S, SCH 5, SCH 80, SCH XXS, SCH 160, SCH10, All Schedules |
| Delivery Condition | Annealed & Pickled, Polished, Bright & Annealed, etc |
Alloy 800 Seamless Pipe Chemical Composition
| Alloy | % | Ni | Cr | Fe | C | Mn | Si | Cu | S | Al | Ti |
| UNS N08800 | Min. | 30 | 19 | 0.15 | 0.15 | ||||||
| – | Max. | 35 | 23 | balance | 0.1 | 1.5 | 1 | 0.75 | 0.015 | 0.6 | 0.6 |
| UNS N08810 | Min. | 30 | 19 | 0.05 | 0.15 | 0.15 | |||||
| – | Max. | 35 | 23 | balance | 0.1 | 1.5 | 1 | 0.75 | 0.015 | 0.6 | 0.6 |
| UNS N08811 | Min. | 30 | 19 | 0.06 | 0.15 | 0.15 | |||||
| – | Max. | 35 | 23 | balance | 0.1 | 1.5 | 1 | 0.75 | 0.015 | 0.6 | 0.6 |
ASTM B407 UNS N08800 Tube Mechanical Properties
| Alloy | Tensile Strength, min psi(MPa) | Condition(Temper) | Elongation in 2 in. or 50 min(or 4D), min, % | Yield Strength, (0.2% offset), min, psi(MPa) |
| UNS NO8800: | 75000(520) | cold-worked annealed | 30 | 30000(205) |
| UNS NO8800: | 65000(450) | hot-finished annealed, or hot-finished | 30 | 25000(170) |
| UNS NO8810 and UNS NO8811: | 65000(450) | hot-finished annealed, or cold-worked annealed | 30 | 25000(170) |
| UNS NO8801: | 65000(450) | hot-finished annealed, or cold-worked annealed | 30 | 25000(170) |
ASTM B407 Seamless Tube Physical Properties
| Properties | Imperial | Metric |
|---|---|---|
| Density | 0.287 lb/in³ | 7.94 g/cm³ |
| Melting point | 2475-2525 °F | 1357-1385 °C |
Rupture Strength of ASTM B407 UNS N08811 Seamless Pipe
| Temperature | 30000 h | 10000 h | 50000 h | 100000 h | |||||
|---|---|---|---|---|---|---|---|---|---|
| °C | °F | MPa | ksi | MPa | ksi | MPa | ksi | MPa | ksi |
| 760 | 1400 | 43 | 6.3 | 50 | 7.3 | 40 | 5.8 | 37 | 5.3 |
| 870 | 1600 | 21 | 3.0 | 24 | 3.5 | 19 | 2.8 | 17 | 2.5 |
| 650 | 1200 | 103 | 15.0 | 121 | 17.5 | 97 | 14.0 | 90 | 13.0 |
| 980 | 1800 | 6.9 | 1.0 | 8.3 | 1.2 | 6.2 | 0.9 | 5.5 | 0.8 |
Modulus of Elasticity of ASME SB407 UNS N08800 Pipe Pipe
| Temperature | Tensile Modulus | Shear Modulus | Poisson's Ratio |
|---|---|---|---|
| °F | 103 ksi | 103 ksi | |
| 20 | 196.5 | 73.4 | 0.339 |
| 75 | 28.50 | 10.64 | 0.339 |
| 200 | 184.8 | 68.5 | 0.349 |
| 400 | 26.81 | 9.91 | 0.353 |
| 400 | 171.6 | 63.0 | 0.362 |
| 800 | 24.64 | 9.04 | 0.363 |
| 1200 | 22.37 | 8.12 | 0.377 |
| 1600 | 19.20 | 6.82 | 0.408 |
| 600 | 157.7 | 57.4 | 0.373 |
| 800 | 141.3 | 50.7 | 0.394 |
SB 407 N08800 Material Weight Chart
| Outside Diameter (OD) | Wall Thickness (WT) | Weight per Meter (kg) | Weight per Foot (lbs) |
|---|---|---|---|
| 10" | 0.375" | 6.55 | 14.45 |
| 12" | 0.500" | 10.41 | 23.04 |
| 14" | 0.500" | 12.18 | 26.91 |
| 16" | 0.625" | 20.04 | 44.20 |
| 18" | 0.750" | 22.17 | 48.84 |
| 20" | 0.750" | 24.70 | 54.50 |
| 24" | 1.000" | 42.13 | 93.00 |
| 30" | 1.250" | 65.21 | 144.00 |
| 36" | 1.500" | 94.47 | 208.00 |
| 48" | 2.000" | 161.29 | 355.00 |
HS Code for Incoloy Pipe
| HS Code | Description |
|---|---|
| 73044900 | HOT ROLLED PIPES CONF. TO MATERIAL SPECN. ASTM B407 (INCOLOY 800/800H/800HT) |
| 73044100 | COLD FINISHED PIPES CONF. TO MATERIAL SPECN. ASTM B407 (INCOLOY 800/800H/800HT) |
Applications
Heating Element Sheathing: Oxidation resistance and service life.
Heat Exchangers / Pressure Vessels: Corrosion resistance, pressure-bearing capacity, and tube-to-tubesheet compatibility.
Petrochemical Industry Steam/Methane Reformers: Structural stability at high temperatures.
Alloy 800H Seamless Pipe supplier
As a supplier of high-quality nickel-based alloy tubes, GNEE has established a comprehensive quality and compliance system. We welcome and support our clients in conducting thorough audits of our manufacturing facility's credentials-including certifications relevant to pressure vessel fabrication, such as the PED (EU Pressure Equipment Directive) and the ASME U Stamp (ASME Boiler and Pressure Vessel Code certification)-thereby ensuring that our products meet the rigorous requirements of international engineering projects.
Quality Inspection
Hydrostatic Test: Every pipe must undergo a pressure test.
Eddy Current Testing (ET) or Ultrasonic Testing (UT): To detect defects such as cracks, pinholes, or folds on both the inner and outer surfaces of the pipe wall.
PMI Testing (Handheld Spectrometer): Conducted via on-site spot checks to ensure that no incorrect materials have been shipped (as their appearance is similar to that of standard stainless steel).
The following are the standard packaging specifications for ASTM B407 Incoloy 800 seamless tubes:
Plastic Caps: Both ends of each tube must be fitted with secure plastic caps.
Function: Protection against damage and contamination.
Individual Plastic Bagging: It is recommended that each tube be individually enclosed in a plastic film bag or bubble wrap.
Hexagonal Bundles: For small to medium-diameter tubes, hexagonal bundling is typically employed to ensure structural stability.
Seaworthy Fumigated Wooden Cases: This is the most commonly used packaging method for Incoloy 800.
