Grade | Grade A | Grade B | Grade C |
Carbon max. % | 0.25 | 0.30 | 0.35 |
Manganese % | 0.27 to 0.93 | 0.29 to 1.06 | 0.29 to 1.06 |
Phosphorous, max. % | 0.035 | 0.035 | 0.035 |
Sulfur, max. % | 0.035 | 0.035 | 0.035 |
Silicon, min.% | 0.10 | 0.10 | 0.10 |
Chrome, max. % | 0.40 | 0.40 | 0.40 |
Copper, max. % | 0.40 | 0.40 | 0.40 |
Molybdenum, max. % | 0.15 | 0.15 | 0.15 |
Nickel, max. % | 0.40 | 0.40 | 0.40 |
Vanadium, max.% | 0.08 | 0.08 | 0.08 |
Grade | Grade A | Grade B | Grade C |
Tensile Strength, min., psi | 48000 | 60000 | 70000 |
Yield Strength, min., psi | 30000 | 35000 | 40000 |
ASTM A106 Steel Grade | Tensile Test MPa or N/mm2 | ||
Min. Yield Point | Min. Tensile Strength | Elongation (%) | |
Grade A | 205 | 330 | 20 |
Grade B | 240 | 415 | 20 |
Grade C | 275 | 485 | 20 |
Specification | Mechanical Properties | Grade A | Grade B | Grade C |
ASTM A53 | Tensile strength, min, psi (MPa) | 48000(330) | 60000(415) | |
Yield strength, min, psi (MPa) | 30000(205) | 35000(240) | ||
ASTM A106 | Tensile strength, min, psi (MPa) | 48000(330) | 60000(415) | 70000(485) |
Yield strength, min, psi (MPa) | 30000(205) | 35000(240) | 40000(275) |
Heat Treatment | Hot-finished pipe need not be heat treated. Cold-drawn pipe shall be heat treated after the final cold draw pass at a temperature of 1200 °F (650 °C) or higher. |
Process | The steel shall be killed steel, with the primary melting process being open-hearth, basic-oxygen, or electric-furnace, possibly combined with separate degassing or refining. If secondary melting, using electroslag remelting or vacuum-arc remelting is subsequently employed, the heat shall be defined as all of the ingots remelted from a single primary heat. Steel cast in ingots or strand cast is permissible. When steels of different grades are sequentially strand cast, identifi- cation of the resultant transition material is required. The producer shall remove the transition material by any estab- lished procedure that positively separates the grades. |
Surface Treatment | Oil-dip, Varnish, Passivation, Phosphating, Shot Blasting |
Hydrostatic Testing | Inspection test pressures produce a stress in the pipe wall equal to 60% of specified minimum yield strength (SMYS) at room temperature. Maximum Pressures are not to exceed 2500 psi for NPS3 and must stay under 2800 psi for the larger sizes. Pressure is maintained for not less than 5 seconds. |
Nondestructive Electric Test | The full body of each pipe shall be tested with a nondestructive electric test in accordance with Practice E 213, E 309, or E 570. |
Mechanical Tests Specified | Tensile Test - NPS 8 and larger - either transverse or longitudinal acceptable smaller than NPS 8 - weighed in lots. Larger sizes - by length. Flattening Test - NPS 2-1/2 and larger. Bending Test (Cold) - NPS 2 and under. |
INCH | OD | ASTM A106 Standard Wall Thickness | ||||||
(MM) | SCH 10 | SCH 20 | SCH 40 | SCH 60 | SCH 80 | SCH 100 | SCH 160 | |
(mm) | (mm) | (mm) | (mm) | (mm) | (mm) | (mm) | ||
1/4" | 13.7 | 2.24 | 3.02 | |||||
3/8" | 17.1 | 2.31 | 3.2 | |||||
1/2" | 21.3 | 2.11 | 2.77 | 3.73 | 4.78 | |||
3/4" | 26.7 | 2.11 | 2.87 | 3.91 | 5.56 | |||
1" | 33.4 | 2.77 | 3.38 | 4.55 | 6.35 | |||
1-1/4" | 42.2 | 2.77 | 3.56 | 4.85 | 6.35 | |||
1-1/2" | 48.3 | 2.77 | 3.68 | 5.08 | 7.14 | |||
2" | 60.3 | 2.77 | 3.91 | 5.54 | 8.74 | |||
2-1/2" | 73 | 3.05 | 5.16 | 7.01 | 9.53 | |||
3" | 88.9 | 3.05 | 5.49 | 7.62 | 11.13 | |||
3-1/2" | 101.6 | 3.05 | 5.74 | 8.08 | ||||
4" | 114.3 | 3.05 | 4.50 | 6.02 | 8.56 | 13.49 | ||
5" | 141.3 | 3.4 | 6.55 | 9.53 | 15.88 | |||
6" | 168.3 | 3.4 | 7.11 | 10.97 | 18.26 | |||
8" | 219.1 | 3.76 | 6.35 | 8.18 | 10.31 | 12.70 | 15.09 | 23.01 |
10" | 273 | 4.19 | 6.35 | 9.27 | 12.7 | 15.09 | 18.26 | 28.58 |
12" | 323.8 | 4.57 | 6.35 | 10.31 | 14.27 | 17.48 | 21.44 | 33.32 |
14" | 355 | 6.35 | 7.92 | 11.13 | 15.09 | 19.05 | 23.83 | 36.71 |
16" | 406 | 6.35 | 7.92 | 12.70 | 16.66 | 21.44 | 26.19 | 40.49 |
18" | 457 | 6.35 | 7.92 | 14.27 | 19.05 | 23.83 | 29.36 | 46.24 |
20" | 508 | 6.35 | 9.53 | 15.09 | 20.62 | 26.19 | 32.54 | 50.01 |
22" | 559 | 6.35 | 9.53 | 22.23 | 28.58 | 34.93 | 54.98 | |
24" | 610 | 6.35 | 9.53 | 17.48 | 24.61 | 30.96 | 38.89 | 59.54 |
26" | 660 | 7.92 | 12.7 |