ASTM B407 UNS N08811 Explanation

ASTM B407 UNS N08811 (Incoloy 800HT) seamless pipe is a heat-resistant nickel alloy material. Annealed at temperatures not less than 2100°F (1900°C or higher) to achieve an ASTM Grade 5 or coarser grain structure, this imparts excellent high-temperature creep strength and fracture toughness, making it typically suitable for operating temperatures above 593°C.

This material exhibits excellent oxidation resistance (usable up to 1900°F) and resistance to chloride stress corrosion cracking at high temperatures. Typical mechanical properties include a tensile strength of at least 450 MPa, a yield strength of at least 170 MPa, and an elongation of 30% or greater.

It is primarily used in key equipment such as high-temperature heat exchangers, superheated steam piping, and reformer outlet manifolds in the chemical and power industries.

Composition	Value (%)	Details
Nickel (Ni)	30.0 - 35.0	Maintains austenitic matrix stability, providing basic corrosion resistance and high-temperature strength.
Chromium (Cr)	19.0 - 23.0	Endows the alloy with excellent oxidation and carburization resistance.
Iron (Fe)	≥39.5 (Remain)	A key matrix element, helps balance cost and performance.
Carbon (C)	0.06 - 0.10	Controlled within this range optimizes high-temperature creep strength.
Aluminum (Al)	0.15 - 0.60	Combined with titanium, it forms a stable compound, enhancing intergranular corrosion resistance and high-temperature performance.
Titanium (Ti)	0.15 - 0.60	Combined with aluminum, it forms a stable compound, enhancing intergranular corrosion resistance and high-temperature performance.
Aluminum + Titanium (Al+Ti)	0.85 - 1.20	Ensures optimal high-temperature performance.
Manganese (Mn)	≤1.50	Common impurity elements.
Silicon (Si)	≤1.0	Common impurity elements.
Copper (Cu)	≤0.75	Common impurity elements.
Sulfur (S)	≤0.015	Impurity elements are strictly controlled to ensure hot workability.

Physical Parameters	Range	Description
Density (ρ)	7.94 - 8.0 g/cm³	Room temperature.
Melting Point (Tm)	1350 - 1400 °C	Solidus-liquidus temperature range.
Elastic Modulus (E)	200 GPa	Room temperature conditions.

Mechanical Properties	Value	Standard
Tensile Strength	≥450 MPa (65,000 psi)	ASTM B407
Yield Strength	≥170 MPa (25,000 psi)	ASTM B407
Elongation at Break	≥30% - 35%	The gauge length is 2 inches or 50mm.

ASTM Specification	ASTM B407 / ASME SB407
Standard	ASTM, ASME, JIS, AISI, AMS, EN, SAE, DIN, NF, TOCT, DS, DTD, GB
Seamless Pipe Size	4 to 219mm W. T.: 0.5 to 20mm
Welded EFW Size	5.0 - 1219.2 mm
Swg & Bwg	10 Swg., 12 Swg., 14 Swg., 16 Swg., 18 Swg., 20 Swg.
Schedule	SCH5, SCH10, SCH10S, SCH20, SCH30, SCH40, SCH40S, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS
Length	Single Random, Double Random, Standard & Cut length Pipe
Finish	Polished, AP (Annealed & Pickled), BA (Bright & Annealed), MF, NO.1, NO.4, 2B, BA, HL, 8K, Mirror finish, etc
Form	Round, Square, Hollow, Rectangular, Hydraulic, Coiled, Straight Pipes, "U" Shape, Pan Cake Coils, etc.
Type	Seamless / ERW/ EFW / Welded / Fabricated / CDW / DOM / CEW ASTM B407 UNS N08811 Pipe
Pipe End	Plain End, Beveled End, Treaded Pipe, Screwed ends
Dimension	ANSI/ ASME B36.10, B36.19, B2.1

Parameters	Value
OD	10 mm - 762 mm
WT	1 mm - 140 mm
Typical Size
- Small diameter, thin wall	25 mm OD × 3 mm WT
- Medium diameter, standard wall	108 mm OD × 6 mm WT
- Large diameter, thick wall	325 mm OD × 12 mm WT
Length	5m-12m, customized
Weight Calculation	W = 0.02491 × WT × (OD - WT)

Petroleum and Chemical Industry

In the petrochemical industry, UNS N08811 seamless pipe is a core material for key components such as the outlet manifold and pigtails of integrated equipment, as well as melt furnace tubes. This alloy, through precisely controlled carbon, aluminum, and titanium content and grain size, ensures safe and stable operation of petrochemical equipment under high temperatures and pressures for extended periods.

High-Temperature Industrial Environments

UNS N08811 seamless pipe is widely used in the manufacture of heat exchangers, air preheaters, and other equipment for various industrial furnaces. These applications require not only excellent thermal conductivity but also exceptional stability and corrosion resistance under high-temperature conditions. The alloy is stable in both high-temperature oxidizing and reducing atmospheres, effectively improving energy efficiency and extending equipment life.

ASTM B407 UNS N08811 SMLS Pipe Applications

Power and Energy Industry

In the power and energy industry, UNS N08811 seamless pipe is used in key components such as steam superheater piping in power generation systems and high-temperature heat exchangers in gas-cooled nuclear reactors. These applications require the material to maintain excellent creep rupture strength and structural stability under long-term conditions of high temperatures and pressures.

High-Temperature Structural Components

As structural components in high-temperature environments, UNS N08811 seamless pipe is commonly used in the manufacture of fixtures, baskets, radiant tubes, and stills for heat treatment furnaces. These applications require the material to withstand sustained high-temperature loads up to 1150°C, placing extremely high demands on high-temperature oxidation resistance and long-term structural stability.

Special Corrosive Environments

For applications in special corrosive environments, UNS N08811 seamless pipe is suitable for equipment such as nitric acid condensers, steam heating tubes, and piping in sour gas environments. Its high nickel content provides excellent resistance to stress corrosion cracking, while its chromium content imparts excellent resistance to pitting and crevice corrosion. This makes the alloy exceptionally resistant to oxidizing media such as nitric acid and organic acids.

How To Get ASTM B407 UNS N08811 SMLS Pipe Price

First, you'll need to prepare detailed technical documentation, clearly specifying the product standard, material grade, specific dimensions, purchase quantity, and any special inspection or certification requirements. You can then request a quote through a reputable B2B platform or directly contact the manufacturer.

Please note that the final quote will be significantly affected by current raw material market price fluctuations, order quantity, and delivery terms. Therefore, obtaining and comparing quotes from multiple suppliers is crucial to ensuring a cost-effective transaction.