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% |
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
UNS N08031 Seamles Nickel Alloy Steel Tube are high-performance nickel-based alloy tubes known for their exceptional corrosion resistance, strength and durability in demanding environments. ① STANDARD: ASTM B622/ ASTM B829 ...② OD RANGE : 6-457 MM③ THICKNESS RANGE: 1-45 MM
Seamless Inconel 600 Nickel Alloy Pipe is a high-performance nickel-chromium alloy tube known for their excellent resistance to corrosion, oxidation, and high temperatures. ① STANDARD: ASTM B163/ASME SB163,ASTM B167 / ASME SB167....② OD RANGE : 6-457 MM③ THICKNESS RANGE: 1-65 MM
Inconel 718 Seamless Nickel Alloy Steel Pipe are high-strength, corrosion-resistant tubes crafted from a nickel-chromium alloy known for exceptional performance in extreme environments.① STANDARD: ASTM B983...② OD RANGE : 6-457 MM③ THICKNESS RANGE: 1-45 MM
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