ASTM A420
ASTM A420：美国材料试验学会低温使用的锻制碳钢和合金钢管道配件
牌号：WPL6
壁厚为5/16英寸（7.94毫米）及以上的矩形试样，适用于全截面试验的所有小尺寸;
最小％in 2 in。或50毫米
壁厚小于5/16英寸[7.94毫米]的矩形试样; 最小％in 2 in。
或50 mm（1/2 in。[12.7-mm]宽样品）
化学要求
A级
成分 %
C
锰
磷
硫
硅
镍
铬
钼
铜
碳
钒
WPL6
0.30
1.50-1.35
0.035
0.04
0.15-0.40
0.40
0.3
0.12
0.02B
0.08
WPL9
0.20
0.40-1.06
0.030
0.03
...
1.60-2.24
0.75-1.25
WPL3 C
0.31-0.64
0.05
0.13-0.37
3.2-3.8
WPL8 D
0.13
0.90
8.4-9.6
A When fittings are of welded construction, the symbols above shall be supplemented by the letter"W".
B By agreement,the limit for Columbium may be increased up to 0.05% on heat analysis and 0.06% on product analysis.
C Fittings made from plate or forgings may have 0.90% max manganese.
D Fittings made from plate may have 0.98% maxmanganese.
可用尺寸范围
外径(mm/inch)
壁厚(SCH)
10
20
30
STD
40
60
XS
80
100
120
140
160
XXS
21.3 (1/2'')
Δ
26.7 (3/4'')
33.4 (1'')
42.2 (1 1/4'')
48.3 (1 1/2'')
60.3 (2'')
73 (2 1/2'')
88.9 (3'')
101.6 (3 1/2'')
114.3 (4'')
141.3 (5'')
168.3 (6'')
219.1 (8'')
273 (10'')
323.8 (12'')
355.6 (14'')
406.4 (16'')
457 (18'')
508 (20'')
559 (22'')
610 (24'')
