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% |
UNS N08031 Seamles Nickel Alloy Steel Pipe 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
Inconel 601 Seamless Nickel Alloy Steel Pipe is made from a high-performance nickel-chromium-iron alloy, specially designed to offer outstanding oxidation resistance and mechanical strength at elevated temperatures. This makes them an ideal choice for demanding industrial environments. ① STANDARD: ASTM B167/ASME SB167/ASTM B829 ...② OD RANGE : 6-457 MM③ THICKNESS RANGE: 1-45 MM
Seamless Inconel 600 Nickel Alloy Tube 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 : 6-257 MM③ THICKNESS RANGE: 1-35 MM
Hastelloy B3 Seamless Nickel Alloy Steel Pipe is a high-performance nickel-molybdenum alloy tube specifically designed to offer excellent resistance to hydrochloric acid and other strongly reducing chemicals. Known for their enhanced thermal stability and improved fabricability, these tubes are widely used in harsh chemical environments. ① STANDARD: ASTM B622/ ASTM B829 ...② OD RANGE : 6-457 MM③ THICKNESS RANGE: 1-45 MM
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