|
|
Grade A |
Grade B |
Grade C |
|
Carbon max. % |
0.25 |
0.3 |
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.% |
0.1 |
0.1 |
0.1 |
|
Chrome, max. % |
0.4 |
0.4 |
0.4 |
|
Copper, max. % |
0.4 |
0.4 |
0.4 |
|
Molybdenum, max. % |
0.15 |
0.15 |
0.15 |
|
Nickel, max. % |
0.4 |
0.4 |
0.4 |
|
Vanadium, max.% |
0.08 |
0.08 |
0.08 |
|
Total of Cr, Cu, Mo, Ni, and V shall not exceed 1% |
|||
|
|
Grade A |
Grade B |
Grade C |
|
Tensile Strength, min., psi(Mpa) |
48,000(330) |
60,000(415) |
70,000(485) |
|
Yield Strength, min., psi(Mpa) |
30,000(205) |
35,000(240) |
40,000(275) |
|
NPS [DN Designator] |
Over |
Under |
||
|
|
in. |
mm |
in. |
mm |
|
1/8 to 1-1/2 [6 to 40], incl |
1/64 (0.015) |
0.4 |
1/64 (0.015) |
0.4 |
|
Over 1-1/2 to 4 [40 to 100], incl |
1/32 (0.031) |
0.8 |
1/32 (0.031) |
0.8 |
|
Over 4 to 8 [100 to 200], incl |
1/16 (0.062) |
1.6 |
1/32 (0.031) |
0.8 |
|
Over 8 to 18 [200 to 450], incl |
3/32 (0.093) |
2.4 |
1/32 (0.031) |
0.8 |
|
Over 18 to 26 [450 to 650], incl |
1/8 (0.125) |
3.2 |
1/32 (0.031) |
0.8 |
|
Over 26 to 34 [650 to 859], incl |
5/32 (0.156) |
4.0 |
1/32 (0.031) |
0.8 |
|
Over 34 to 48 [850 to 1200], incl |
3/16 (0.187) |
4.8 |
1/32 (0.031) |
0.8 |
Wall Thickness
The minimum wall thickness at any point shall be not more than 12.5% under the nominal wall thickness specified.
