ASTM B668 UNS N08028 Seamless Incoloy Pipe also called Alloy 28 Incoloy Alloy Steel Pipe or 1.4563 Alloy Steel Pipe.ASTM B668 is the standard specification for seamless pipe and tube made from UNS N08028 (also known as Incoloy Alloy 028 or Sanicro 28), an iron-nickel-chromium-molybdenum alloy designed for superior resistance to corrosive environments, particularly sulfuric acid and phosphoric acid services. This material is commonly used in chemical processing, oil and gas, and marine applications due to its high strength, pitting resistance, and stress corrosion cracking resistance.
ASTM B668 UNS N08028 Seamless Incoloy Pipe
ASTM B668 is the standard specification for seamless pipe and tube made from UNS N08028 (also known as Incoloy Alloy 028 or Sanicro 28), an iron-nickel-chromium-molybdenum alloy designed for superior resistance to corrosive environments, particularly sulfuric acid and phosphoric acid services. This material is commonly used in chemical processing, oil and gas, and marine applications due to its high strength, pitting resistance, and stress corrosion cracking resistance. The specification covers both cold-finished and hot-finished seamless products, which must be supplied in a solution-annealed condition (typically heat-treated at 1,900–2,050°F or 1,040–1,120°C, followed by rapid quenching).The "seamless" designation refers to pipes and tubes produced without welds, ensuring uniformity and enhanced corrosion resistance. UNS N08028 is not a true stainless steel but a nickel-based superalloy, often marketed under the Incoloy brand by Special Metals Corporation.
|
Element |
Composition (%) |
|
Carbon (C) |
≤ 0.03 |
|
Silicon (Si) |
≤ 1.00 |
|
Manganese (Mn) |
≤ 2.50 |
|
Phosphorus (P) |
≤ 0.03 |
|
Sulfur (S) |
≤ 0.03 |
|
Chromium (Cr) |
26.0–38.0 |
|
Nickel (Ni) |
30.0–34.0 |
|
Molybdenum (Mo) |
2.6–3.3 |
|
Copper (Cu) |
0.6–1.4 |
|
Iron (Fe) |
Balance |
|
Property |
Value (ksi / MPa) |
|
Tensile Strength |
73 ksi / 500 MPa |
|
Yield Strength (0.2% offset) |
35 ksi / 240 MPa |
|
Elongation (in 2 in. or 50 mm) |
35% |
Hastelloy B2 Seamless Nickel Alloy Steel Tube is a high-performance nickel-molybdenum alloy tube designed to resist strong reducing agents such as hydrochloric acid and other aggressive chemical environments. Ideal for use in industries like chemical processing, power generation, marine, and pharmaceuticals, these tubes offer outstanding corrosion resistance, mechanical strength, and thermal stability.① STANDARD: ASTM B622/ASME SB622 for seamless , ASTM B619 for welded ...② OD RANGE : 6-257 MM③ THICKNESS RANGE: 1-35 MM
Seamless Incoloy 825 Nickel Alloy Steel Pipe is a high-performance piping product made from Incoloy 825 (a registered trademark of Special Metals Corporation), an austenitic nickel-iron-chromium alloy with additions of molybdenum, copper, and titanium.It is a seamless pipe, meaning it's manufactured without a welded seam, providing superior structural integrity, especially under high pressure and temperature applications.The alloying elements provide broad resistance to a wide range of corrosive environments:• Chloride-Ion Stress-Corrosion Cracking: High nickel content provides excellent resistance.• Pitting and Crevice Corrosion: Enhanced by the molybdenum content.• Reducing Agents and Acids: Nickel, molybdenum, and copper provide outstanding resistance to agents like sulfuric acid and phosphoric acid.• Oxidizing Agents: Chromium confers resistance to oxidizing substances like nitric acid.• Intergranular Corrosion: The titanium addition, combined with appropriate heat treatment, stabilizes the alloy, making it resistant to intergranular attack, even after welding.① STANDARD: ASTM B163 ASTMB423 Seamless Superheater, Condenser, Hydraulic, Boiler and Heat-Exchanger Tubes② OD RANGE : 6-457 MM③ THICKNESS RANGE: 1-45 MM
Seamless Inconel 625 Nickel Alloy Steel Tube (also known as UNS N06625 or Alloy 625) is a high-performance, nickel-chromium-molybdenum superalloy tube renowned for its exceptional strength and resistance to a wide range of corrosive environments and high temperatures.① Standards: Conforms to ASTM B444, ASTM B829, ASTM B704/B705, ASME SB444, SB704/SB705, AMS 5581, ISO 6207, VdTÜV 499, BS 3074NA21, DIN 17751.② OD RANGE : 6-257MM③ THICKNESS RANGE: 1-35 MM
Seamless Incoloy 800HT Pipe are high-performance iron-nickel-chromium alloy tubes designed for exceptional strength and superior resistance to high-temperature oxidation and corrosion. Manufactured to meet ASTM B407 standards, these seamless tubes are widely used in industries such as petrochemical, power generation, and heat treatment. ① STANDARD: ASTM B407 ...② OD RANGE : 6-508MM③ THICKNESS RANGE: 1-45 MM
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