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Weld Studs ISO 13918 (UT) Capacitor Discharge Unthreaded Stud UT
Weld Studs ISO 13918 (UT) Capacitor Discharge Unthreaded Stud UT
Description
Product Information
ISO 13918 (UT) is the international standard for welding stud specifications and their requirements for arc stud welding operations. The acronym UT stands for “ultrasonic testing,” which is a non-destructive testing method used to inspect welds for defects.
This standard defines the minimum requirements for studs made of carbon or low-alloy steel, which are designed for arc stud welding operations. The studs need to be manufactured according to the prescribed specifications and tested for their mechanical properties, such as tensile strength and elongation. The weldability and material properties of the studs are critical to the performance of the overall welded assembly.
The ultrasonic testing requirement in ISO 13918 ensures that the welded studs meet the quality requirements for the intended use. This non-destructive testing method is used to detect flaws or imperfections in the welded studs that could lead to their failure under load or over time. During ultrasonic testing, the studs are subjected to a high-frequency sound wave that is directed at the welds. The reflected sound waves are analyzed to identify any anomalies or defects within the weld.
The use of ultrasonic testing in welding has several advantages, including minimizing damage to the welded parts, reducing inspection time, and improving inspection accuracy. This testing method is also suitable for a wide range of materials and welding processes, making it a versatile tool in quality control.
ISO 13918 (UT) is a crucial standard that ensures the quality and safety of arc stud welding operations. By complying with this standard, manufacturers can produce high-quality welded assemblies that meet industry standards and regulatory requirements. Welded structures that are fabricated according to ISO 13918 (UT) specifications have a higher probability of withstanding demanding applications without failure or need for costly rework.
In conclusion, ISO 13918 (UT) specifies important requirements to ensure the performance and safety of welded studs used in arc stud welding operations. The use of ultrasonic testing as a non-destructive testing method is crucial in detecting any defects or flaws within the welds, which ensures that only high-quality studs are used in the final welded assemblies. Compliance with this standard helps manufacturers produce reliable welded structures that meet the rigorous demands of their intended use.
ISO 13918 (UT) Info And Sizes
MYWAY UT capacitor discharge threaded stud are designed to be welded to thin metal material by tip ignition process. It has flange that can produce a grater weld strength than the thread area. It’s uausally used as stop points or locators.
Materials: UT studs are available in low carbon steel 4.8 coppered plated, stainless steel SUS304 A2-50 and SS316L A2-70, pure aluminium, aluminnium magnesium alloy.
MYWAY UT studs according to standard of ISO 13918.
Dimensions of unthreaded stud (UT)
Dimensions in milimeters (mm)
| d1 ± 0.1 | 3 | 4 | 5 | 6 | 7.1 |
| l1min. +0.6 | 8 | 8 | 12 | 12 | 15 |
| d2 ± 0.2 | 4.5 | 5.5 | 6.5 | 7.5 | 9 |
| d4 ± 0.08 | 0.6 | 0.65 | 0.75 | 0.75 | 0.75 |
| l3 ± 0.05 | 0.55 | 0.55 | 0.8 | 0.8 | 0.85 |
| h1 | 0.7 – 1.4 | 0.7 – 1.4 | 0.8 – 1.4 | 0.7 – 1.4 | 0.8 – 1.4 |
| α ± 2° | 174 | 174 | 174 | 174 | 174 |
When inquiring or ordering, specify type, material, diameter, length after weld (LAW), quantity, terms.
Exemple: UT, 4.8 coppered, 5 X 20, 50,000pieces, FOB China.
Common Fastener Materials
Fasteners are fabricated from a variety of materials. These options include metals and polymers. Stainless steel offers strength and corrosion resistance. While polymer options have less strength than stainless, they are a good choice for resisting chemicals. The most common materials are:
- Stainless steel
- Alloy steel
- Low carbon steel
- Medium carbon steel
- Titanium
- Polymers, such as nylon
Finish Options
The use of heat treatments and application of various finishes, also known as “plating,” affects the look and performance of fasteners. Finishes provide material stability and protect the fasteners from corrosion and rust. Below are some common heat treatment and finish benefits:
- Zinc coating – Most common, low cost, resists corrosion and rust
- Galvanized – Superior corrosion protection, anti-seize, higher upfront investment
- Stainless – Great for humid environments, strong, ideal for electrical or mechanical uses
- Black – Adds color, provides better grip, deflects light
Our Weld Studs Factory
MYWAY Services
MYWAY strictly complies with the requirements of the ISO9001 quality certification system, strictly controls quality, implements it at every level, and assigns responsibilities to everyone to ensure the healthy operation of the comprehensive system of design, production, sales, and after-sales service. In order to strengthen communication with users, better provide users with high-quality products, and better serve users with the brand, we have made the following commitments:
1. Products are designed and manufactured in strict accordance with standards. We produce non-standard products according to the drawings provided by customers.
2. Pre-sales service
Serving customers: product introduction, answers to technical questions, and engineering-assisted design.
3. Sales service
1). The products are based on the needs of user orders, with quality and delivery time as the premise.
2). During the use of the product, our company regularly organizes technical and quality inspection service personnel to visit and solicit feedback from users on the quality, usage status, improvement opinions and other aspects of the product, so as to further improve product quality.
4. After-sales service
1). If users have any problems or information when using our products, please report them back to the company in a timely manner so that the company can properly handle and improve them so that our products can better meet your requirements.
2). If the product does not work properly or is damaged due to quality problems during the warranty period, our company will be responsible for free repair or replacement. If the product is damaged or does not work properly due to improper use by the user, our company can provide repair services. If users need it, our company can provide users with free pre-sales and after-sales technical consultation.
.After-sales service. Users are required to fill in the product service and quality feedback information form and make appraisal opinions in order to improve the quality of MYWAY products and services.
FAQ
Q: What is stud welding used for?
A: Stud welding is a widely used joining process within the industry that addresses various construction and assembly needs. The rapid and reliable attachment of fasteners onto metal surfaces along with its durable and strong bond means that it is very often a preferred or essential fastening process.
Q: How strong are weld studs?
A: Tensile Strength: 60,000 PSI Min. Yield Strength: 50,000 PSI Min.
Q: What is a CD weld stud?
A: Capacitor Discharge stud welding is a semi-automatic arc welding process. However, with CD welding, you have the ability to weld small diameter studs to very thin material.
Q: Is stud welding hard?
A: It’s Easier. Stud welding is a far more straightforward process than resistance welding. It only requires one step to join your materials together. To connect your two metals permanently, all you need is a few weld studs and your equipment.
Q: What grade are weld studs?
A: Stainless threaded weld studs are mostly stocked in grade 302HQ / 30430. on the weld end to preclude the plating from compromising the weld quality. studs can be annealed to a maximum of 75 Rockwell B hardness and 85 Rockwell B hardness, respectively.
Q: What is the spacing for welded studs?
A: The minimum spacing between the centre- lines of shear studs is governed by access requirements for the stud welding gun. A minimum spacing of between 60 mm and 70 mm is possible, depending on the size of the studs, but a minimum of 100 mm is pre- ferred by fabricators.
Q: How do you test a weld stud?
A: A simple way to test the shear torque of threaded studs is apply a straight pull of the Weld Stud Test Tool (no side load). When the wrench breaks-over and the stud is still attached then it passed. If the threaded stud breaks off – then it failed.
Q: Can Stud Welding Be Done In The Rain?
A: Recommendation for stud welding in cold or wet weather: Stud Welding shall not be done when the base metal temperature is below 0°F or when the surface is wet or exposed to falling rain or snow.
Q: What material is used for stud welding?
A: Both mild steels and stainless steels can be stud welded. In general, steel is great as a stud and base materials as it suits the drawn arc stud welding and capacitor discharge stud welding processes.
Q: How fast is stud welding?
A: Short cycle stud welding is a quicker form of the drawn arc stud welding process for attaching metal studs and other fasteners to metal sheets. It only takes from 10 up to 100 milliseconds to attach the stud to the parent sheet using this method.
Q: What's the hardest type of welding?
A: Tungsten Inert Gas (TIG) welding is widely considered the most challenging welding process to learn. The sheer complexity of the technique requires more practice and focus to master than other less-technical welding methods. TIG welding also results in some of the strongest and sturdiest welds in the industry.
Q: What is the minimum thickness for stud welding?
A: Short Cycle requires a minimum thickness of 1.5mm (regardless of diameter); Drawn Arc requires a minimum material thickness of one third of the stud diameter (e.g. 12mm Diameter has a minimum thickness of 4mm sheet).
Q: Are welds as strong as bolts?
A: There’s a common misconception that welding is stronger than bolting, but that simply isn’t true. Bolting is just as strong as welding—and can be stronger in some situations. The strength of a weld is largely determined by the expertise of the welder.
Q: What are the positions for welding studs?
A: Welding Position: SC Studs can be welded in the down hand, side hand and overhead positions. In the side hand and overhead positions this becomes increasingly more difficult as the stud diameter increases.
Q: What is the hammer test for stud welding?
A: All studs should be checked in this way by the welder or the welder’s mate. The bend test requires the head of a stud to be displaced laterally by approximately a quarter of its height using a 6 kg hammer. The weld should then be checked for signs of cracking or lack of fusion.
Q: What metal cannot be welded?
A: Some examples of material combinations that cannot be fusion welded successfully are aluminum and steel (carbon or stainless steel), aluminum and copper, and titanium and steel. Nothing can be done to alter their metallurgical properties.
Q: What PPE is needed for stud welding?
A: Protective clothing including long sleeves and long pants is recommended for protection during application of weld studs. Welding gloves, aprons or jackets are also recommended where appropriate. Respiratory protection is not needed in well ventilated areas.
Q: Is stud welding standard?
A: ISO 14555 – Welding – Arc stud welding of metallic materials. This is an important standard in stud welding. It covers the requirements for the qualification of welding personnel and welding procedures for the mechanical fastening of accessories using stud welding processes.
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