ASTM B983
ASTM B983 Basic Info
ASTM B983 covers the mechanical properties of nickel alloy seamless pipes and tubes used in high-temperature service. These pipes and tubes, typically made from alloys like Inconel 600 (UNS N06600) and Inconel 625 (UNS N06625), exhibit high tensile strength, excellent toughness, and superior corrosion resistance. Engineered to withstand extreme conditions, they are commonly employed in aerospace, chemical processing, and oil and gas industries where reliability and performance under pressure are paramount.
Characteristics of ASTM B983
- High Temperature Resistance: ASTM B983 steel is designed to withstand high temperatures, making it suitable for use in environments with extreme heat conditions.
- Corrosion Resistance: These materials exhibit excellent resistance to corrosion, particularly in harsh and corrosive environments encountered in chemical processing and power generation industries.
- Strength and Durability: ASTM B983 steel offers high strength and durability, ensuring reliable performance even in demanding applications.
- Versatility: ASTM B983 steel is versatile and finds applications in various industries, including aerospace, automotive, and marine, due to its exceptional mechanical properties and corrosion resistance.
- Seamless and Welded Options: ASTM B983 specifies both seamless and welded nickel-cobalt-iron alloy tubes, providing flexibility in design and installation for different project requirements.
ASTM B983 Data Sheet
Steel Grade
Dimensions and Tol.
Equivalent Steel Grades
Chemical Composition
Mechanical Properties
Testing Items
Steel Grade
UNS N06600
UNS N06002
UNS N06022
UNS N06059
UNS N10276
Dimensions and Tol.
Outer Diameter (OD):
Specified by the purchaser in accordance with the nominal size and standard tolerances.
Wall Thickness (WT):
Specified by the purchaser or as required by the applicable product specification.
Length:
Tubes are typically supplied in random lengths, but specific lengths may be agreed upon between the purchaser and supplier.
Tolerances:
Outside diameter and wall thickness tolerances are specified by the applicable product specification or agreed upon between the purchaser and supplier.
Equivalent Steel Grades
United States:
- Equivalent Grades: UNS N06600, UNS N06002, UNS N06022, UNS N06059, UNS N10276
- Standard: ASTM B983
Germany:
- Equivalent Grades: 2.4816, 2.4633, 2.4602, 2.4605, 2.4819
- Standard: DIN EN 10095, DIN EN 10088
United Kingdom:
- Equivalent Grades: NA14, NA22, NA50, NA23, NA51
- Standard: BS 3074, BS 3076
Japan:
- Equivalent Grades: NCF600, NCF602, NCF625, NCF625LCF, NCF686
- Standard: JIS G3463, JIS G3459
Chemical Composition
UNS N06600 (Inconel 600):
- Nickel (Ni): 72.0 min
- Cobalt (Co): –
- Chromium (Cr): 14.0 – 17.0
- Iron (Fe): 6.0 – 10.0
- Molybdenum (Mo): –
- Tungsten (W): –
- Carbon (C): 0.15 max
- Silicon (Si): 0.5 max
- Manganese (Mn): 1.0 max
- Copper (Cu): 0.5 max
- Sulfur (S): 0.015 max
- Phosphorus (P): 0.015 max
- Aluminum (Al): –
UNS N06002 (Alloy 602):
- Nickel (Ni): 72.0 min
- Cobalt (Co): 2.5 max
- Chromium (Cr): –
- Iron (Fe): 5.0 max
- Molybdenum (Mo): 7.0 – 9.0
- Tungsten (W): –
- Carbon (C): 0.1 max
- Silicon (Si): 0.1 max
- Manganese (Mn): 0.5 max
- Copper (Cu): 0.1 max
- Sulfur (S): 0.015 max
- Phosphorus (P): 0.015 max
- Aluminum (Al): 0.2 max
UNS N06022 (Hastelloy C-22):
- Nickel (Ni): 56.0 min
- Cobalt (Co): –
- Chromium (Cr): 20.0 – 22.5
- Iron (Fe): 2.0 – 6.0
- Molybdenum (Mo): 12.5 – 14.5
- Tungsten (W): 2.5 – 3.5
- Carbon (C): 0.015 max
- Silicon (Si): 0.08 max
- Manganese (Mn): 0.5 max
- Copper (Cu): 0.5 max
- Sulfur (S): 0.02 max
- Phosphorus (P): 0.02 max
- Aluminum (Al): –
UNS N06059:
- Nickel (Ni): 48.0 min
- Cobalt (Co): –
- Chromium (Cr): 15.0 – 18.0
- Iron (Fe): –
- Molybdenum (Mo): 15.0 – 17.0
- Tungsten (W): 0.5 – 3.0
- Carbon (C): 0.01 max
- Silicon (Si): 0.08 max
- Manganese (Mn): 0.5 max
- Copper (Cu): 0.5 max
- Sulfur (S): 0.02 max
- Phosphorus (P): 0.02 max
- Aluminum (Al): –
UNS N10276 (Hastelloy C-276):
- Nickel (Ni): 57.0 min
- Cobalt (Co): –
- Chromium (Cr): 14.5 – 16.5
- Iron (Fe): 4.0 – 7.0
- Molybdenum (Mo): 15.0 – 17.0
- Tungsten (W): –
- Carbon (C): 0.01 max
- Silicon (Si): 0.08 max
- Manganese (Mn): 1.0 max
- Copper (Cu): 0.5 max
- Sulfur (S): 0.03 max
- Phosphorus (P): 0.04 max
- Aluminum (Al): –
Mechanical Properties
Tensile Strength (MPa):
- UNS N06600 (Inconel 600): 550 min
- UNS N06022 (Hastelloy C-22): 690 min
- UNS N06059: 690 min
- UNS N10276 (Hastelloy C-276): 690 min
Yield Strength (0.2% Offset) (MPa):
- UNS N06600 (Inconel 600): 240 min
- UNS N06022 (Hastelloy C-22): 310 min
- UNS N06059: 310 min
- UNS N10276 (Hastelloy C-276): 310 min
Elongation (%):
- UNS N06600 (Inconel 600): 30 min
- UNS N06022 (Hastelloy C-22): 40 min
- UNS N06059: 40 min
- UNS N10276 (Hastelloy C-276): 40 min
Testing Items
Material Testing:
Manufacturers conduct comprehensive material testing to verify compliance with ASTM B983. Tests include chemical composition analysis, mechanical properties testing (such as tensile strength, yield strength, and elongation), and hardness testing.
Dimensional Inspection:
Dimensional inspection ensures that the tubes meet the specified dimensions outlined in ASTM B983. This includes diameter, wall thickness, length, straightness, and ovality measurements.
Surface Finish:
Surface finish requirements are meticulously examined to ensure that tubes meet ASTM B983 standards. This includes visual inspection for surface imperfections, such as scratches, pits, and corrosion.
Non-Destructive Testing (NDT):
Various NDT methods, such as ultrasonic testing (UT), eddy-current testing (ECT), and visual inspection, are employed to detect surface and subsurface defects in tubes without causing damage.
Hydrostatic Testing:
Hydrostatic testing involves pressurizing tubes with water to a specified level to assess their strength and leakage resistance. Tubes must withstand the prescribed pressure without leakage or permanent deformation.
Heat Treatment:
Heat treatment processes, if required, are carefully controlled to achieve the desired microstructure and mechanical properties in accordance with ASTM B983 requirements.
Fabrication and Welding of ASTM B983
Quality Assurance and Compliance: Emphasize the importance of quality assurance and compliance with ASTM B983 standards to ensure the reliability and performance of the tubes in service. Explain how manufacturers adhere to stringent quality control measures and undergo testing to meet the requirements of the standard.
Machining:
ASTM B444 materials can be machined using conventional methods, but carbide-tipped tools are recommended to minimize tool wear and achieve smooth finishes.
Forming:
Cold forming operations such as bending and shaping can be performed on ASTM B444 materials, but it’s essential to avoid excessive deformation to prevent cracking or weakening of the material.
Heat Treatment:
Heat treatment of ASTM B444 materials may be necessary to achieve desired mechanical properties or relieve residual stresses from fabrication processes. Consult material specifications for specific heat treatment procedures.
Welding:
Welding of ASTM B444 materials requires careful consideration of matching filler metals and preheating to minimize the risk of cracking and ensure proper fusion. Common welding methods include TIG (Tungsten Inert Gas) welding and electron beam welding. Proper cleaning of surfaces and shielding gas selection are critical to prevent contamination and achieve high-quality welds.
Post-Weld Heat Treatment (PWHT):
Depending on the grade and application, post-weld heat treatment may be required to restore material properties and relieve residual stresses from welding. Follow specific PWHT procedures recommended for the grade of ASTM B444 material being welded.
