高精密无缝冷拔管
(1)
钢号:
St52（16Mn,E355）, CK45(45#), 20#, , 4140, 1 Q345B,
Q345D, 10#，20#，ST35,（E235）,
ST37.4 ,ST45（E255）,
(2)
内径: 38 -
350mm
(3)
长度: 最长 14m.
(4)
直线度: 0.5
/1000
(5)
标准: DIN2391， DIN2445， EN10305， DIN1629， DIN1630， ASTM A179，GB/T3639,GB/T8163,GB/T8162.GB/8713等等。
(6)
内经公差范围：珩磨管用-0.40mm，刮削滚光管用-0.40~-0.80mm。
(7)
工艺：酸洗，冷拔，去应力，矫直
(8)
包装：内外表面涂油防护，两端加端盖，钢带捆扎，编织袋包装。
EXCENTRICITY
Outer Diameter | Excentricity |
125 mm | 5 % |
>125 mm | 7 % |
Steel Grade | Chemical composition % |
C | Si | Mn | P | S | Al |
≤ | ≥ |
20# | 0.17-0.24 | 0.17-0.37 | 0.35-0.65 | 0.035 | 0.035 | / |
45# | 0.42-0.50 | 0.17-0.37 | 0.50-0.80 | 0.035 | 0.035 | / |
Q345B | ≤0.2 | ≤0.5 | 1.00-1.60 | 0.03 | 0.03 | / |
Q345D | ≤0.2 | ≤0.5 | 1.00-1.60 | 0.03 | 0.03 | 0.015 |
25Mn | 0.22-0.29 | 0.17-0.37 | 0.70-1.00 | 0.035 | 0.035 | / |
27SiMn | 0.24-0.32 | 1.10-1.40 | 1.10-1.40 | 0.035 | 0.035 | / |
ST52 | ≤0.22 | ≤0.55 | ≤1.6 | 0.025 | 0.025 | / |
SAE1026 | 0.22-0.28 | 0.15-0.35 | 0.60-0.90 | 0.04 | 0.05 | / |
| | | | | | | |
Delivery Condition | cold finished (hard) (BK) | cold drawn and stress-relieved (BK+S) | |
|
Steel Grade | Tensile
Strength (Mpa) | Elongation (%) | Tensile
Strength (Mpa) | Yield
Strength (Mpa) | Elongation (%) | |
|
20# | ≥550 | ≥8 | ≥520 | ≥375 | ≥15 | |
45# | ≥640 | ≥5 | ≥600 | ≥520 | ≥10 | |
16Mn | ≥640 | ≥5 | ≥600 | ≥520 | ≥14 | |
25Mn | ≥640 | ≥5 | ≥600 | ≥510 | ≥15 | |
27SiMn | ≥800 | ≥5 | ≥760 | ≥610 | ≥10 | |
ST52 | ≥640 | ≥5 | ≥600 | ≥520 | ≥14 | |
SAE1026 | ≥640 | ≥5 | ≥600 | ≥510 | ≥15 | |
