We are the experts in the field of digital welding and have rich experience in welding machine manufacturing.
The story of Arccaptain started in , which is the leading digital welding machine manufacturer, aiming to provide high-quality welding solutions for distributors in the welding industry and customers who are passionate about DIY.
More than 300 dealers in over 100 different countries have found success selling our welding equipment over the past two decades.
At the same time, in order to ensure the quality of digital welding machines and popularize better welding technology, all our products have passed the test of TÜV&CSA witness laboratory, and we established a R&D center for welding machines.
Listening to customers&#; opinions and responding to their needs allowed us to accumulate a wealth of experience in the welding field. We have also invested considerable effort in learning about the wants and concerns of online shoppers.
Finally, we realized the importance of solving problems directly for consumers, so we created a DTC brand.
As a digital welding machine manufacturer, ARCCAPTAIN's mission is to let more people who love welding and have DIY welding needs use our machines and fall in love with our machines.
We have a clear understanding of our strengths and future objectives owing to our continuous efforts to improve the technology behind welding machine manufacturing and our extensive financial investments in the emerging field of digital welding machines.
Our Slogan
Digital Welding Expert, Know You More
We want to share our enthusiasm in the field of welding machines with more friends, and we also want to hear the voices of more people who love welding. We will usher in a new era in digital welding.
We are committed to creating a welding machine brand that customers like and respect and becoming a leader in the field of digital welding machines
Our goal is to serve more than 300,00 users within the next five years, giving our clients a sense of value and satisfaction with our offerings.
We are here to break boundaries
We strive to help people weld at their best, regardless of their skill or profession and feel 100% confident in the machine&#;s ability, precision and reliability.
Power & Performance
ARCCAPTAIN® digital inverter welders have been designed to get the maximum power output from a compact unit, helping you achieve the welds you&#;ve dreamed of. We relentlessly test every machine with best in the field welding experts to ensure your machine can sustain the heavy demands and needs of any welder.
Reliability
ARCCAPTAIN® equipment has been designed to withstand even the toughest of conditions from rough job sites to rural properties, we guarantee our products will last. We are so confident in our machines durability.
Innovation
We search globally for what&#;s next in the industry ensuring that every product we create, has been built for a specific purpose through new technologies and superior engineering, meeting the needs you didn&#;t know you had.
A Welder For Everyone
ARCCAPTAIN® welders are used all over USA and Europe, from small backyard projects to large infrastructure projects such as high-rises, coalmines and Navy warships. Our comprehensive range of machines and equipment cover every level of performance and budget.
Customer First -- We will always provide customer support, answer questions, and help customers find better solutions. ARCCAPTAIN knows that 100% customer satisfaction is our goal.
Integrity management -- We will always operate in good faith, face our problems objectively, and not make false propaganda.
Harmony and tolerance -- Harmony is our calm and orderly work, tolerance and understanding of interpersonal relationships, and establishing internal and external harmony, unity from top to bottom, and a good atmosphere in the company&#;s social relations.
Quality first -- we will strictly abide by the principle of quality first, continuously improve manufacturing technology, and optimize product quality
Protect the environment -- As a company, we want to do our part to make the world a better place by protecting the environment while also making efficient use of the world&#;s resources.
The corrosion resistance of stainless steel makes it an attractive choice for many critical tube and pipe applications, including high-purity food and beverage, pharmaceutical, pressure vessel, and petrochemical uses. However, the material doesn&#;t dissipate heat as well as mild steel or aluminum do, and poor welding practices can decrease its ability to resist corrosion. Applying too much heat input and using the wrong filler metal are two culprits.
Following some best practices for stainless steel welding can help improve results and ensure that the metal maintains its corrosion resistance. Furthermore, upgrading the welding process can deliver productivity benefits without impacting quality.
In stainless steel welding, filler metal selection is crucial to controlling carbon levels. The filler metal used for stainless steel tube and pipe welding should enhance the weld properties and meet the application requirements.
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Look for filler metals with an &#;L&#; designation, such as ER308L, because these provide a lower maximum carbon content, which helps retain corrosion resistance in low-carbon stainless alloys. Welding a low-carbon base material with a standard filler metal can increase the carbon content of the weld joint and thereby increase the risk of corrosion. Avoid filler metals with an &#;H&#; designation, since these provide higher carbon content designed for applications that require greater strength at high temperatures.
When welding stainless steels, it&#;s also important to choose a filler metal with low trace (also called tramp) elements. These are residual elements&#;including antimony, arsenic, phosphorus, and sulfur&#;in the raw materials used to make filler metals. They can affect the material&#;s corrosion resistance substantially.
Because stainless steel is so sensitive to heat input, joint preparation and proper fit-up play key roles in controlling the heat to maintain the material&#;s properties. With gaps or uneven fit-up between the parts, the torch must stay in one spot longer, and more filler metal is needed to fill those gaps. This results in heat buildup in the affected area, which can overheat the part. Poor fit-up also can make it harder to bridge gaps and get the necessary weld penetration. Take care to ensure part fit-up is as close to perfect as possible with stainless steel.
Cleanness also is very important with this material. Very small amounts of contaminants or dirt in the weld joint can cause defects that reduce strength and corrosion resistance in the final product. To clean the base material before welding, use a dedicated brush specifically for stainless steel that has not been used on carbon steel or aluminum.
In stainless steel, sensitization is the primary cause of the loss of corrosion resistance. It can occur when weld temperatures and cooling rates fluctuate too much, changing the microstructure of the material.
A key part of corrosion resistance in stainless steel is chromium oxide. But if carbon levels in the weld are too high, it forms chromium carbides. These tie up the chromium and prevent the formation of the needed chromium oxide that gives stainless steel its corrosion resistance. Without enough chromium oxide, the material doesn&#;t have the desired properties, and corrosion can set in.
Preventing sensitization comes down to filler metal selection and controlling heat input. As stated previously, it&#;s important to choose a low-carbon filler metal for stainless steel welding. However, sometimes carbon is needed to provide strength for certain applications. When it&#;s not possible to choose a low-carbon filler metal, controlling the heat is especially important.
Minimize the time the weld and the heat-affected zone are held at high temperatures&#; generally considered to be 950 to 1,500 degrees F (500 to 800 degrees C). The less time a weld spends in this range, the less heat can build up. Always check and adhere to interpass temperatures in the welding procedure for the application.
Another option is to use filler metals designed with alloying ingredients such as titanium and niobium that prevent the formation of chromium carbides. Because these ingredients also affect strength and toughness, these filler metals can&#;t be used in all applications.
Using gas tungsten arc welding (GTAW) for the root pass is the traditional method for welding stainless steel tube and pipe. This typically requires a back purge of argon gas to help prevent oxidation on the back side of the weld. However, using wire welding processes is becoming more common with stainless steel tube and pipe. In these applications, it&#;s important to understand how the various shielding gases affect the material&#;s corrosion resistance.
Mixtures of argon and carbon dioxide, argon and oxygen, or three-gas mixtures (helium, argon, and carbon dioxide) have traditionally been used when welding stainless steel with the gas metal arc welding (GMAW) process. Often, these mixes contain mostly argon or helium and less than 5% of carbon dioxide since carbon dioxide can contribute carbon to the weld pool and increase the risk of sensitization. Pure argon isn&#;t recommended for GMAW on stainless.
Flux-cored wires for stainless steel are designed to run with a traditional mixes of 75% argon and 25% carbon dioxide. The flux contains ingredients designed to prevent the carbon in the shielding gas from contaminating the weld.
As GMAW processes have evolved, they have simplified stainless steel tube and pipe welding. While some applications may still require the GTAW process, advanced wire processes can offer similar quality and much better productivity in many stainless applications.
Using a modified short-circuit GMAW process such as Regulated Metal Deposition (RMD) from Miller for the root pass eliminates the back purge in certain austenitic stainless steel applications. The RMD root pass can be followed by pulsed GMAW or flux-cored arc welding fill and cap passes&#;a change that saves time and money compared to using GTAW with back purging, especially on larger pipes.
RMD uses a precisely controlled short-circuit metal transfer that creates a calm, stable arc and weld puddle. This provides less chance of cold lap or lack of fusion, less spatter, and a higher quality root pass on pipe. Precisely controlled metal transfer also provides uniform droplet deposition and makes it easier to control the puddle and, therefore, heat input and welding speeds.
An unconventional process can increase welding productivity. When using RMD, welding speed can be from 6 to 12 in./min. Because the process allows an increase in productivity without putting additional heat into the part, it helps maintain the properties and corrosion resistance of stainless steel. The reduced heat input of the process also helps control distortion of the base material.
This pulsed GMAW process provides a shorter arc length, narrower arc cone, and less heat input compared with traditional spray pulse transfer. Since the process is closed-loop, arc wandering and variations in tip-to-work distances are virtually eliminated. This provides easier puddle control for in-position and out-of-position welding. Finally, coupling pulsed GMAW for fill and cap passes with RMD for the root pass permits welding procedures with one wire and one gas, eliminating process changeover time.
Contact us to discuss your requirements of ER308L high-quality wire for stainless steel fabrication. Our experienced sales team can help you identify the options that best suit your needs.