About ASTM B161 Standard
ASTM B161 is a standard specification formulated by the American Society for Testing and Materials (ASTM) for nickel seamless pipe and tube. ASTM B161 specification covers nickel (UNS N02200, nickel 200, 2.4066, 2.4060) and low-carbon nickel (UNS N02201, nickel 201, 2.4061, 2.4068) in the form of cold-worked seamless pipe and tube.
This ASME SB161 standard specifies the manufacturing process, chemical composition, mechanical properties, dimensions, and tolerances of nickel seamless pipe and tube. The manufacturing process includes hot or cold worked, annealed, normalized, or stress-relieved conditions. The chemical composition of the nickel alloy should conform to the specified limits of carbon, manganese, silicon, phosphorus, sulfur, nickel, chromium, molybdenum, iron, copper, titanium, aluminum, columbium, and tungsten. The mechanical properties include tensile strength, yield strength, elongation, and hardness.
Chemical Requirements
| Element | Composition,% | |
| Nickel (UNS N02200) | Low-Carbon Nickel (UNS N02201) |
|
| Ni,A min | 99.0 | 99.0 |
| Cu,max | 0.25 | 0.25 |
| Fe,max | 0.40 | 0.40 |
| Mn,max | 0.35 | 0.35 |
| C,maxt | 0.15 | 0.02 |
| Si,max | 0.35 | 0.35 |
| S.max | 0.01 | 0.01 |
Mechanical Properties
| Condition and Size | Tensile Streng | th,min,psi (MPa) | Yield Strength (0.2 %offset),min,psi (MPa) |
Elongation in 2 in.or 50 mm (or 4D),min,% | ||
| (UNS N02200) | (UNS N02201) | (UNS N02200) | (UNS N02201) | (UNS N02201) | (UNS N02201) | |
| Annealed: | ||||||
| 5 in.(127 mm)and under outside diameter | 55000(380) | 50000 (345) | 15000 (105) | 12000 (80) | 35 | 35 |
| Over 5 in.(127 mm)in outside diameter | 55000 (380) | 50000 (345) | 12000 (80) | 10000 (70) | 40 | 40 |
| Stress-Relieved: | ||||||
| All sizes | 65000 (450) | 60000 (415) | 40000 (275) | 30000 (205) | 15 | 15 |
Mechanical PropertiesA of Small-Diameter and Light-Wall Tubing(Converter Sizes)
| Condition | Tensile Strength,psi (MPa) | Yield Strength (0.2 %offset), min,psi (MPa) |
Elongation in 2 in or 50 mm,min,% |
| Nickel UNS N02200 | |||
| AnnealedB | 75000(515)max | 15000(105) | 33 |
| Half-hardC | 80000(550)min | 40000(275) | 12 |
| Full hardD | 95000 (655)min | 75000(515) | 4 |
| Low-Carbon Nickel UNS N02201 | |||
| AnnealedB | 70000 (480)max | 12000 (85) | 35 |
| Half-hardC | 70000(480)min | 30000 (205) | 12 |
| Full hardD | 85000 (585)min | 65000(450) | 4 |
A Not applicable to outside diameters under 1⁄8 in. (3.2 mm) and wall thicknesses under 0.015 in. (0.38 mm).
B This condition is sometimes designated as "No. 1 Temper."
C This condition is sometimes designated as "No. 2 Temper."
D This condition is sometimes designated as "No. 3 Temper."
Permissible Variations for Small-Diameter and Light-Wall Tube (Converter Sizes)
| Specified Outside Diameter,in.(mm) | Outside Diameter | Inside Diameter | Wall Thickness,% | |||
| Plus | Minus | Plus | Minus | Plus | Minus | |
| Under 3/32(2.4) | 0.002 (0.05) | 0 | 0 | 0.002 (0.05) | 10 | 10 |
| 3/32 to 3/16(2.4 to 4.8),excl | 0.003 (0.08) | 0 | 0 | 0.003 (0.08) | 10 | 10 |
|
3/16 to 1/2(4.8 to 12.7),excl |
0.004 (0.10) | 0 | 0 | 0.004 (0.10) | 10 | 10 |
| 1/2 to 1/4(12.7 to 31.8),incl | 0.005 (0.13) | 0 | 0 | 0.005 (0.13) | 10 | 10 |
ASTM B161 sizes and dimensions
The dimensions and tolerances of nickel seamless pipe and tube should comply with the standard specifications. The size range for seamless nickel pipes is from 1/8 to 12 inches in outside diameter and from 0.035 to 0.875 inches in wall thickness. The size range for seamless nickel tubes is from 1/8 to 5 inches in outside diameter and from 0.015 to 0.500 inches in wall thickness.
Referenced Documents
B829 Specification for General Requirements for Nickel and Nickel Alloys Seamless Pipe and Tube
Number of Tests
1 Chemical Analysis-One test per lot.
2 Tension-One test per lot.
3 Hydrostatic or Nondestructive Electric Test-Each piece in each lot.
