| 钢级： | 300 系列，不锈钢 304/316L， 400 系列， X5CrNi18-20， 200 系列 | 类型 | 无缝，焊接，圆管/钢管 |
|---|---|---|---|
| 标准： | ASTM， AISI， GB， DIN， JIS | 认证： | ISO，SGS，BV，ISO & SGS，ISO/CE/SGS |
| 长度 | 3000 毫米-6000 毫米，6 米或定制，最大 18000 米，11.8 米或根据需要，8 米 | 厚度 | 0.4-30毫米， 1.0毫米， 0.6毫米-2500毫米， 1毫米-60毫米， 0.6-25 毫米 |
| 技术： | 冷轧、热轧、冷拔、挤压、冷拔/冷轧或两者兼有 | 产品名称 | 不锈钢管，304 304L 316 316L 321 310S 不锈钢焊接管/无缝管，工厂直销电热元件用不锈钢管，不锈钢无缝管/管 |
| 外径： | 6-630毫米，定制， 6-762毫米， 6-860毫米;， 6毫米-630毫米 | 表面： | 退火，8K，抛光或非抛光，摩尔/铂金 |
| 完成： | 刷光，冷拔，酸洗，光亮退火或未退火，光亮 |
ASTM A249 / ASME SA249 TP304 Stainless Steel Welded Tube For Boiler and Heat Exchanger
概述
Austenitic stainless steel alloys including grade 304， tend to make some of the best additions in the piping system. In the case of the ASTM A249 TP 304 Welded Stainless Steel Tube， this is true because the cost of the entire operation could be greatly reduced by the use of alloy 304 for its construction. The alloy is easily accessible across global markets and has mechanical properties that make the ASTM A249 Welded Stainless Steel Tubing material versatile enough to be used in varying operations including as a superheater， heat exchanger， boiler， or even condenser tubes.
Grade 304 stainless steel is the most widely used commercial grade of stainless steel supplied into numerous industry sectors which also referred as WNR 1.4301 Welded Tube. ASTM A249 Stainless Steel 304 Welded Tube has excellent corrosion resistance in ordinary atmospheric conditions， it is easily machined and is also easy to weld. ASTM A249 304 Welded Condenser Tubes also maintains its strength and toughness at sub-zero temperatures.
ASTM A249 焊接奥氏体钢管的机械性能
SA 249 | 拉伸应力（兆帕） | 屈服应力（mpa） | 伸长率（%） |
|---|---|---|---|
TP304 | 515 | 205 | 35 |
ASME SA 249 TP 304 管的化学成分
SA 249 | C | SI | 明尼苏达州 | CR | NI | S | P | FE |
|---|---|---|---|---|---|---|---|---|
TP304 | 0，08 | 1，0 | 2 | 18 - 20 | 8 - 11 | 0，03 | 0，045 | 巴尔 |
ASTM A249 304L SS Equivalent
SA 249 | UNS | WNR./ DIN | EN | JIS | GB |
|---|---|---|---|---|---|
TP 304L | S30403 | 1.4307 | X5CrNi18-10 | SUS304L | 022Cr19Ni10 |
ASME SA 249 TP304 Welded Stainless Steel Tubes Conditions
We have complete sets of production lines， including auto welding machines and bright annealed device， production capacity can meet kinds of requirement and additional value service， like U bend tube ，bright annealing welded tube ， cold drawn precision tube.
U Bend Welded Tube
In heat exchanger system， it often requires U bend type stainless steel tubes， U bending tube has benefits to save cost. leg length max 12 meters， radius max 1.5 meters， bending part should be heat treated to relieve stress， thereafter pickling to ensure tube surface clean.
Bright Annealing Tube
Bright annealing and annealed pickling processes can eliminate the scaling to make inside and outside surface clean， inert gas hydrogen air in closed furnace， then heat treatment improve tube roughness， it made tube more brighter， when it is installed in heater and cooler system， that will be easy as well as to clean.
Depending on the application， A249 316 or 316L grade can endure higher temperatures than other grades of stainless steel. It is much better than 304 and 304L grades.
If you would like to extend the life of stainless-steel tubes in harsh environments， 316/316L welded tubing is an excellent option for heat exchangers， superheaters， and boilers due to its high corrosion resistance and ability to resist internal and external corrosion.
