焊接不锈钢管和无缝不锈钢管区别
项目 | 无缝不锈钢管 | 焊接钢管 |
钢管制造 | 可生产可焊接方法难以生产的壁厚管 | 钢管规格范围宽，制造价格低，适于薄壁管生产 |
偏差 | 壁厚偏差大 | 壁厚偏差小，内外表面光滑 |
加工性 | 进行弯曲加工一般没有问题 | 因为有焊缝，弯曲加工中有时须注意 |
抗腐蚀性 | 适于强腐蚀环境下使用 | 如果加工处理不当，在强腐蚀环境中，焊缝可能先被腐蚀 |
价格 | 设备复杂，工序多，设备费和生产费用高，所以价格比焊管高 | 设备简单，价格低，尤其对薄壁管，在大批量生产的情况下更为有利 |
用途举例 | 锅炉管、加热管、冷却管、热交换器管、冷凝器管、蒸馏管、再沸器管、盘管加热器、高温高压配管、废热吸热管、测量仪表配管、温度计保护管 | 水煤气配管，结构管，造纸设备配管热交换器管，废水管，化学纤维管，合成纤维配管，啤酒，黄油、牛奶业用装置管，建设、家具、制药设备用管等 |
不锈钢化学成分表
The chart of stainless steel chemical component
牌号Trade | 化学成分Chemical composition（%） | |||||||||
美标ASTM | 中国GB | C | Si | Mn | P | S | Ni | Cr | Mo | Ti |
304 | 0Cr18Ni9 | ≤0.070 | ≤1.00 | ≤2.00 | ≤0.035 | ≤0.030 | 8.00~11.00 | 17.00~19.00 | ||
304L | 00Cr19Ni10 | ≤0.030 | ≤1.00 | ≤2.00 | ≤0.035 | ≤0.030 | 8.00~12.00 | 18.00~20.00 | ||
316 | 0Cr17Ni12Mo2 | ≤0.080 | ≤1.00 | ≤2.00 | ≤0.035 | ≤0.030 | 12.00~15.00 | 16.00~18.00 | 2.00~3.00 | |
316L | 00Cr17Ni14Mo2 | ≤0.030 | ≤1.00 | ≤2.00 | ≤0.035 | ≤0.030 | 10.00~14.00 | 16.00~18.00 | 2.00~12.50 | |
409L | 00Cr12Ti | ≤0.025 | ≤0.80 | ≤0.80 | ≤0.035 | ≤0.020 | 10.40~12.50 | 6xC%~0.75 | ||
不锈钢机械性能
The chart of stainless steel mechanical performance
中国标准 G B | 抗拉强度Mpa Tensile strength | 屈服强度 Bending strength | 伸长率Elnogation ratio § 0.5% | |
热处理状态 Heat treatment status | 非热处理状态 Non heat treatment status | |||
0Cr18Ni9 | ≥520 | ≥210 | ≥35 | ≥25 |
00Cr19Ni10 | ≥480 | ≥180 | ≥35 | ≥25 |
0Cr17Ni12Mo2 | ≥520 | ≥210 | ≥35 | ≥25 |
00Cr17Ni14Mo2 | ≥480 | ≥180 | ≥35 | ≥25 |
1Cr17Mm6Ni5N | ≥245 | ≥635 | ≥40 | |
1Cr18Mm8Ni5N | ≥245 | ≥590 | ≥40 | |
00Cr12Ti | 365--460 | 175--270 | ≥40 | |
不锈钢牌号的主要用途
The main use of stainless steel trademark
牌号 Trademark | 类型 Category | 用途 Application |
304 0Cr18Ni9 | 奥氏体 Austenitic | 作为不锈钢耐热使用广泛，食品用设备，一般化工设备，原子能工业用 As a refractory steel ,is widely used in manufacturing equipment for food, common chemical and nuclear industries |
304L 00Cr19Ni10 | 奥氏体 Austenitic | 用于抗晶间腐蚀性要求高的化学、煤炭、石油产业的野外露天机器、建材、耐热零件及热处理有困难的零件 It is widely used in the equipment of Petroleum，heat-resistant hardware and some special hardware difficult heat treatment，which have high requirements on the anti-crystalloid corrosion |
316 0Cr17Ni12Mo2 | 奥氏体 Austenitic | Adding about 2.5％ molybdenum fine plasticity and cold processing performance，mainly used in deep punching parts and relevant equipment，such as light industry，home electric appliance，kitchen appliance，construction and decorations etc |
316L ％％％％00Cr17Ni14Mo2 | 奥氏体 Austenitic | Uitra-low carbon type of |
409 00Cr12Ti | 铁素体 Femite | Usually used for the vent-pipe and decorative pipes |
