壁厚 外徑 | 7 | 10 | 11.5 | 12 | 13 | 15 | 16 | 20 | 20.5 | 26 |
76 | × | |||||||||
(77) | × | |||||||||
77.5 | × | |||||||||
(80) | × | |||||||||
92 | × | |||||||||
95 | × | × | ||||||||
96 | × | × | ||||||||
102 | × | |||||||||
108 | × | |||||||||
114 | × | × | × | |||||||
(115) | × | |||||||||
(116) | × | |||||||||
(120) | × | |||||||||
121 | × | |||||||||
(122) | × |
供貨條件 | 按外徑和壁厚供給的鋼管 | 按外徑、內徑和壁厚差供給的鋼管 | 對於外徑為77mm、內徑為57mm、壁厚為lOmm的鋼管 | ||||
直徑和壁厚答應偏差 | 鋼管尺寸/mm | 答應偏差(%) | 鋼管尺寸 | 答應偏差 | 鋼管尺寸 | 答應偏差 | |
外 徑 | ±1.O | 外徑 | ±1.0% | 外徑 | +1.O 一0.5mm | ||
壁厚 | ≤7 | +15 —9 | |||||
內徑 | ±1.75% | 內徑 | +1.5 —0.5mm | ||||
>7~15 | +12.5 —10 | ||||||
>15 | +12.5 —7.5 | 壁厚差 | ≤15% 公稱壁厚 | 壁厚差 | ≤15% 公稱壁厚 |
牌號 | 化學成分(質量分數)(%) | |||||||
C | Mn | si | S | P | Cr | Ni | Cu | |
45 | 0.42~O.50 | O.50~0.80 | 0.17~O.37 | ≤O.040 | ≤0.040 | ≤O.25 | ≤0.25 | ≤O.25 |
45Mn2 | O.42~O.49 | 1.40~1.80 | O.20~O.40 | ≤0.040 | ≤O.040 | ≤0.35 | ≤0.35 | ≤O.30 |
40Cr | 0.37~O.45 | O.50~O.80 | O.20~O.40 | ≤O.040 | ≤O.040 | O.80~ 1.10 | ≤0.35 | ≤0.30 |
20CrNi3 | O.17~O.24 | O.30~O.60 | O.20~0.40 | ≤O.030 | ≤O.035 | 0.60~ O.90 | 2.75~ 3.25 | ≤O.25 |
牌 號 | 力學性能 | 硬 度 | |||
ób | ós | δ5(%) | HBS | 壓痕直徑/mm | |
MPa | |||||
45 | ≥590 | ≥335 | ≥14 | ||
45Mn2 | 217_269 | 4.1~3.7 | |||
40Cr | 217~269 | 4.1~3.7 | |||
20CrNi3A | 217~269 | 4.1~3.7 |