ASTM A234 WPB的理化性能
ASTM A234 WPB是最常见的ASME B16.9碳钢对焊管件材料
化学成分Chemical Compositions ( max, % )
|
钢级Grade A |
WPB B,C,D,E,F |
|
C |
0.30 |
|
Mn |
0.29-1.06 |
|
P |
0.050 |
|
S |
0.058 |
|
Si |
≥0.10 |
|
Cr |
0.40 |
|
Mo |
0.15 |
|
Ni |
0.40 |
|
Cu |
0.40 |
|
V |
0.08 |
B 由棒料或板料制成的管配件，含碳量最大可为0.35。Fittings made from bar or plate may have 0.35 max carbon.
C 由锻件制成的管配件，含碳量最大可为0.35，含硅量最大可为0.35，且无最小值限制。Fittings made from forgings may have 0.35 max carbon and 0.35 max silicon with no minimum.
D 当含碳量在规定的最大含碳量以下时，每降低0.01%碳，含锰量可在规定的最大含量以上递增0.06%，直至最大含锰量为1.35%。For each reduction of 0.01 % below the specified carbon maximum, an increase of 0.06 % manganese above the specified maximum will be permitted, up to amaximum of 1.35 %.
E 铜、镍、铬和钼的总含量总和应不超过1.00%。The sum of Copper, Nickel, Chromium, and Molybdenum shall not exceed 1.00 %.
F 铬和钼的总含量应不超过0.32%。The sum of Chromium and Molybdenum shall not exceed 0.32 %.
拉伸性能 Tensile Requirements
|
钢级Grade |
WPB |
| 抗拉强度范围Tensile strength, range ksi [MPa] |
60–95 |
|
最小屈服强度 Yield strength, min, ksi [MPa] (0.2 % offset or 0.5 % extension-under-load) |
35 [240] |
伸长率Elongation
|
延伸率Elongation: |
WPB |
|
|
纵向 Longitudinal |
横向 Transverse |
|
| 标距为4D的标准圆形试样或小尺寸比例试样的最小值Standard round specimen, or small proportional specimen, min % in 4 D |
22 |
14 |
|
5/16inch（7.94mm）及其以上壁厚的矩形试样，和所有在全截面下试验的小尺寸试样，标距为2inch（50mm） Rectangular specimen for wall thickness 5⁄16 in. [7.94 mm] and over,and for all small sizes tested in full section; min % in 2 in. [50 mm] |
30 |
20 A |
| 5/16inch（7.94mm）以下壁厚的矩形试样, 标距为2inch（50mm）（试样宽1/2inch，12.7mm）Rectangular specimen for wall thickness less than 5⁄16 in. [7.94 mm];min % in 2 in. [50 mm] (1⁄2-in. [12.7-mm] wide specimen) |
B |
B |
A 由板料制成的WPB和WPC管件最小延伸率为17%。WPB and WPC fittings manufactured from plate shall have a minimum elongation of 17 %.
B 允许从上列伸长率值上，对于壁厚在5/16inch（7.94mm）以下的，每减薄1/32inch（0.79mm），纵向伸长率递减1.5%及横向伸长率递减1.0%。下表给出不同壁厚的最小值。For each 1⁄32 in. [0.79 mm] decrease in wall thickness below 5⁄16 in. [7.94 mm], a deduction of 1.5 % for longitudinal and 1.0 % for transverse from the values shown above is permitted. The following table gives the minimum value for various wall thicknesses.
|
壁厚Wall Thickness |
WPB |
||
|
in. |
[mm] |
纵向 Longitudinal |
横向 Transverse |
|
5⁄16 (0.312) |
7.94 |
30 |
20 |
|
9⁄32 (0.281) |
7.14 |
28.5 |
19 |
|
1⁄4 (0.250) |
6.35 |
27 |
18 |
|
7⁄32 (0.219) |
5.56 |
25.5 |
… |
|
3⁄16 (0.188) |
4.76 |
24 |
… |
|
5⁄32 (0.156) |
3.97 |
22.5 |
… |
|
1⁄8 (0.125) |
3.17 |
21 |
… |
|
3⁄32 (0.094) |
2.38 |
19.5 |
… |
|
1⁄16 (0.062) |
1.59 |
18 |
… |
硬度 Hardness- 最高197HB
