S20400预校正S20400锻环
S20400板，棒，管，钢带，线材，锻件，锻管，锻板，锻棒，圆棒，板材，薄板，无缝管，焊管，圆钢，丝材
美国UNS
S20400
ASTM A240/240M-2018
对应标准
用于制造压力容器和一般用途的铬和铬镍不锈钢钢板，薄板，钢带技术规范
Standard Specification for Chromium and Chromium-Nickel Stainless Sieel Plate, Sheet and Stip for Pressure vessels and General Applications
归类
奥氏体不锈钢
性能
耐腐蚀
标签
奥氏体型不锈钢铬-锰-镍钢
S20400化学元素成分含量(%)
焊接工艺流程：
①原材料开卷，平整——生产焊管所需的钢板或钢带都是以卷的形式存在的，所以*步就是进行开卷和平整。
②端部剪切及焊接——通过铣边机对钢板两边缘进行双面铣削，使之达到要求的板宽、板边平行度和坡口形状
③成形——在JCO成型机上首先将预弯后的钢板的一半经过多次步进冲压，压成"J"形，再将钢板的另一半同样④弯曲，压成"C"形，*后形成开口的"O"形。
⑤焊接——采用纵列多丝埋弧焊在成型后的钢管两侧采用气体保护焊（MAG）进行连续焊接。
⑥内外焊珠去除——对焊接形成的焊珠进行清除。
⑦预校正——初步对整体进行修正作业。
⑧感应热处理——用感应电流使工件局部加热的表面热处理工艺。
⑨定径及校直——根据订单对感应热处理后的管子进行定尺扩径，并校正成达标的直线度。
⑩涡流检测——可发现是否存在裂纹、夹杂、凹坑等缺陷。
⑾切断——根据订单对进行定尺裁切。
⑿水压检查——在水压试验机上对切断后的管材进行逐根检验以保证焊管达到标准要求的试验压力，该机具有自动记录和储存功能。
⒀酸洗——利用酸溶液去除钢管表面上的氧化皮和锈蚀物。
⒁*终检查，包装，出货——终极检查合格后的钢管根据用户要求进行防腐和涂层后包装等待出货。
S20400不锈钢管之焊管种类：
按焊缝分——S20400直缝焊管 —|—按断面分——S20400菱形钢管
按焊缝分——S20400螺旋焊管 —|—按断面分——S20400圆形钢管
按工艺分——S20400电弧焊管 —|—按断面分——S20400方形钢管
按工艺分——S20400气焊管 —|—按断面分——S20400椭圆形钢管
按工艺分——S20400炉焊管 —|—按断面分——S20400三角形钢管
按工艺分——S20400低频电阻焊管 —|—按断面分——S20400六角形钢管
按工艺分——S20400高频电阻焊管 —|—按断面分——S20400八角形钢管
S20400 plate, bar, pipe, steel strip, wire, forging, forged pipe, forged plate, forged bar, round bar, plate, thin plate, seamless pipe, welded pipe, round steel, wire
United States UNS
S20400
ASTM A240/240M-2018
Corresponding standards
Standard Specification for Chromium and Chromium Nickel Stainless Steel Plates, Sheets, and Strips for Pressure Vessels and General Applications
Standard Specification for Chromium and Chromium-Nickel Stainless Sieel Plate, Sheet and Stip for Pressure vessels and General Applications
classification
austenitic stainless steel
performance
Corrosion resistance
label
Austenitic stainless steel chromium manganese nickel steel
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S20400 Chemical element content (%)
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Welding process flow:
① Uncoiling and leveling of raw materials - the steel plates or strips required for the production of welded pipes are in the form of coils, so the * step is uncoiling and leveling.
② End shearing and welding - the two edges of the steel plate are milled on both sides by the edge milling machine to achieve the required plate width, plate edge parallelism and groove shape
③ Forming: First, half of the pre bent steel plate is pressed into the "J" shape through multiple step stamping on the JCO forming machine, then the other half of the steel plate is similarly ④ bent and pressed into the "C" shape, and then the "O" shape of the opening is formed.
⑤ Welding - adopt longitudinal multi wire submerged arc welding to conduct continuous welding on both sides of formed steel pipe with gas shielded welding (MAG).
⑥ Internal and external weld bead removal - remove the weld bead formed by welding.
⑦ Precorrection - preliminary correction of the whole.
⑧ Induction heat treatment - surface heat treatment process in which the workpiece is locally heated by induction current.
⑨ Sizing and straightening - according to the order, the pipe after induction heat treatment shall be sized and expanded, and calibrated to reach the standard straightness.
⑩ Eddy current testing - can find whether there are cracks, inclusions, pits and other defects.
(11) Cutting - cutting according to the order.
(12) Hydrostatic inspection: inspect the cut pipes one by one on the hydrostatic testing machine to ensure that the welded pipes meet the test pressure required by the standard. The machine has the function of automatic recording and storage.
(13) Pickling - use acid solution to remove oxide skin and rust on the steel pipe surface.
(14) * Final inspection, packaging and shipment - the steel pipes that pass the final inspection shall be coated and coated according to the user's requirements, and then packaged for shipment.
Type of S20,400 stainless steel pipe welding pipe:
Classified by welding seam - S20400 straight seam welded pipe - | - Classified by section - S20400 rhombic steel pipe
Classified by weld - S20400 spiral welded pipe - | - Classified by section - S20400 round steel pipe
Classified by process - S20400 arc welded pipe - | - Classified by section - S20400 square steel pipe
Classified by process - S20,400 gas welded pipe - | - Classified by section - S20,400 oval steel pipe
Classified by process - S20400 furnace welded pipe - | - Classified by section - S20400 triangular steel pipe
Classified by process - S20400 low frequency resistance welded pipe - | - Classified by section - S20400 hexagonal steel pipe
Classified by process - S20400 high-frequency resistance welded pipe - | - Classified by section - S20400 octagonal steel pipe
德国不锈耐热钢
X7Cr13 X7Cr14 X7CrAl13 X12CrS13 X10Cr13 X8Cr17 X20Cr13 X15Cr13 X46Cr13 X22CrNi17 X12CrMoS17 X100CrMo13 X65CrMo14 X55CrMo14 X110CrMoV15 X90CMoV18 X6CrMo17 X45CuMoV15 X38CrMoV15 X15CrMo13 X20CrMo13 X35CrMo17 X105CrMo17 X5CrNi189 X5CrNi1911 X12CrNiS188 X2CrNi189 X12CrNi177 X2CrNiN1810 X2NiCr1815 X5CrNiMo1810 X2CrNiMo1810 X2CrNiMoN1812 X2CrNiMoN1813 X2CrNiMo1812 X5CrNiMo1812 X2CrNiMo1816 X3CrNiMoN17135 X5CrNiMo1713 X8CrNiMo275 X12CrNiMoN225 X5NiCrMoCuNb2018 X5NiCrMoCuTi2018 X8CrTi17 X8CrNb17 X5CrTi12 X8CrMoTi17 X90CrCoMoV17 X2NiCrMoCu25205 X10CrNiTi189 X5CrNiNb189 X10CrNiNb189 X10CrNiMoTi1810 X10CrNiMoTi1812 X5CrNiMoTi2525 X10CrNiMoNb1810 X4CrNiMoNb257 X10CrNiMoNb1812 X5NiCrMoCuNb2218 X8CrCoNiMo106 X19CrMoVNbN111 X6CrNiMo1713 X15CrMo121 X19CrMo121 X20CrMoV121 X22CrMoV121 X20CrMoWV121 X6CrNiWNb1616 X6CrNi1811 X8CrNiNb1613 X12CrNiWTi1613 X8CrNiMoBNb1616 X8CrNiMoVNb1613 8CrSi77 X10CrSi6 X10CrAl7 X10CrSi13 X10CrAl3 X10CrSi18 X10CrAl18 X10CrAl24 X20CrNiS1254 X15CrNiSi2012 X15CrNiSi2520 X12CrNiTi189 8SiTi4 X7CrTi12 X7CrNi2314 65Si7 X50NiCrWV1313 X40MnCr18 X45SiCr4 X45CrSi93 X215Cr12 X40CrSiMo102 X80CrSiMoW152 X80CrNiSi20 X85CrMoV182 X53CrMoNiN219 X45CrNiW189 X55CrMnNiN208 X70CrMnNiN216 37MnSi5 X45CrNiMo235 X120Mn13 X35Mn18 X40MnCrN19 X40MnCr182 X40MnCr23 X40MnCr18 X50MnCrV2014 X4CrNi1813 X5MnCr1813 X4CrNiMoN1814 X2CrNiMo1815 X8CrNi1812 X5CrNi1811 X45MnNiCrV1376 X25CrNiMnP1810 X15CrNiMn1210 X8CrMnNi188 X50CrMnNiN229 X12MnCr1812 1.4000 1.4001 1.4002 1.4005 1.4006 1.4016 1.4021 1.4024 1.4034 1.4057 1.4104 1.4108 1.4109 1.4110 1.4111 1.4112 1.4113 1.4116 1.4117 1.4119 1.4120 1.4122 1.4125 1.4301 1.4303 1.4305 1.4306 1.4310 1.4311 1.4321 1.4401 1.4404 1.4406 1.4429 1.4435 1.4436 1.4438 1.4439 1.4449 1.4460 1.4462 1.4505 1.4506 1.4510 1.4511 1.4512 1.4523 1.4535 1.4539 1.4541 1.4543 1.4550 1.4571 1.4573 1.4577 1.4580 1.4582 1.4583 1.4586 1.4911 1.4913 1.4914 1.4919 1.4920 1.4921 1.4922 1.4923 1.4935 1.4945 1.4948 1.4961 1.4962 1.4986 1.4988 1.4700 1.4712 1.4713 1.4722 1.4724 1.4741 1.4742 1.4762 1.4821 1.4828 1.4841 1.4845 1.4861 1.4878 1.4710 1.4720 1.4833 1.0906 1.2731 1.3817 1.4704 1.4718 1.4721 1.4731 1.4732 1.4747 1.4748 1.4871 1.4873 1.4875 1.4881 1.5122 1.4994 1.3802 1.3805 1.3813 1.3815 1.3816 1.3817 1.3819 1.3941 1.3949 1.3952 1.3953 1.3956 1.3958 1.3960 1.3961 1.3962 1.3965 1.3967 1.3968
