DIN 34817 - 2017 Weld Stud

Name:Weld Stud

Material: Carbon Steel, Stainless Steel

Carbon steel Grade:5.8,6.8,8.8,10.9

1. The working principle of projection welding:

Projection welding is an evolution of spot welding. Generally speaking, a mountain point is punched out on one of the two plates, and then welded. Due to the concentration of current, it overcomes the defect of nugget offset during spot welding. One or more nuggets form at the joint.

2. Features of the projection welding process:

During projection welding, the electrode must drop rapidly as the bump is sub-collapsed, otherwise spatter will occur due to pressure loss, so a projection welding machine with good electrode followability should be used.

The electrode pressure should ensure that the bumps are completely sub-collapsed when they reach the welding temperature so that the workpieces can fit closely. If the pressure is too high, the bumps will be crushed prematurely, and the function of projection welding will be lost.

The reduced flow density will reduce the strength of the joint, and the pressure will be too small to cause sub-heavy splashing.

Usually, the welding time of projection welding is longer than that of spot welding, and the flow is smaller than that of spot welding. Multi-point projection welding is a slightly longer welding time than single-point projection welding to reduce the difference in heating at each point caused by inconsistent bump heights.

The current required for each spot of projection welding is smaller than that of spot welding the same spot, but the current must be able to melt the bump before the bump is completely crushed. The welding current is approximately the current required for each bump multiplied by the number of bumps.

Size Can also be According to the Customer's requirement for manufacturing, please check the detailed specification sheet details PDF, CAD, 149-150 Page See more product details.

DIN 34817 Type TUS3 Projection Weld Studs

Automotive-Grade Structural Fastening Solutions

DIN 34817 Type TUS3 Projection Weld Studs are high-strength welded fasteners specifically designed for resistance welding applications in automotive manufacturing.

These studs are directly projection-welded to sheet-metal components of the body-in-white (BIW), chassis, and structural assemblies, creating permanent threaded anchor points without the need for pre-drilling.

As a widely recognized automotive fastening standard, DIN 34817 weld studs play a critical role in structural safety, production efficiency, and vehicle lightweight design.

What Is DIN 34817 Type TUS3?

DIN 34817 specifies projection weld studs intended for automated resistance welding processes.

Type TUS3 refers to a specific stud configuration optimized for:

Controlled projection geometry

Stable weld current concentration

Uniform projection collapse

High repeatability in robotic welding environments

These studs are engineered for high-volume automotive production where dimensional accuracy and weld consistency are mandatory.

Key Automotive Applications of DIN 34817 Projection Weld Studs

1. Body-in-White Structural Components

DIN 34817 TUS3 studs are primarily welded to sheet metal panels for:

Reinforcement brackets

Door hinge supports

Anti-collision beam mounting

Body strengthening plates

By eliminating drilled holes, projection-welded studs improve body sealing integrity and torsional rigidity.

2. Safety-Critical Fastening Points

For applications such as:

 Seatbelt anchorage systems (M4–M12)

High-load structural joints

High tensile strength is required to meet crash safety standards.

Projection weld studs ensure a metallurgical bond capable of sustaining dynamic impact loads.

3. Interior and NVH-Optimized Installations

DIN 34817 studs are also used to secure:

Wiring harness brackets

Insulation panels

Interior trim mounting structures

Because no through-holes are required, this hole-free fastening method enhances NVH (Noise, Vibration, Harshness) performance and improves corrosion resistance.

4. Chassis and Electrical Systems

Applications include:

Suspension system brackets

Steering assemblies

Brake line supports

EV battery enclosure grounding studs

In electric vehicle platforms, conductive projection weld studs are widely used for stable electrical grounding connections.

Core Advantages of DIN 34817 TUS3 Projection Weld Studs

High Production Efficiency

Short-cycle welding processes (typically 20–100 ms) make these studs ideal for automated robotic production lines.

This significantly improves throughput while maintaining weld consistency.

Structural Strength and Reliability

The projection welding process creates a strong metallurgical joint with:

High tensile strength

Consistent torque performance

Improved fatigue resistance

This ensures long-term structural reliability under vibration and load.

Hole-Free Integration

No pre-drilling is required, which:

Maintains sheet metal integrity

Enhances sealing performance

Improves corrosion resistance

Supports lightweight design strategies

Cost Optimization

By reducing secondary machining, additional hardware, and assembly steps, DIN 34817 projection weld studs help control overall manufacturing costs.

Technical Specifications

DIN 34817 Type TUS3 Projection Weld Studs are typically manufactured with the following characteristics:

Material: 10B21 19MnB4 or 23MnB4 (quenched and tempered steel)

 Mechanical Property Class: 8.8，10.9

Thread Tolerance: 6g

Product Grade: A

Surface Treatment: Zinc plating, Geomet®, Dacromet®, or customized coatings

Welding Process and Quality Control

The most common process used is short-cycle arc or projection welding.

Key controlled parameters include:

Welding current (e.g., ~400A for M6 studs, depending on substrate)

Weld time (20–100 milliseconds)

Lift height and collapse control

Post-weld inspections may include:

Visual inspection

Hammer testing

Torque testing

Tensile testing

These measures ensure weld integrity without defects such as porosity, incomplete fusion, or burn-through.

DIN 34817 Weld Studs: A Foundation of Modern Automotive Manufacturing

From body structure reinforcement to EV battery grounding applications, DIN 34817 Type TUS3 Projection Weld Studs remain indispensable fastening components in automotive production.

They provide:

Structural safety

Automation compatibility

Production efficiency

Lightweight optimization

Long-term durability

For automotive OEMs and Tier suppliers, consistency in weld performance is not optional — it is essential.

DIN 34817 Type TUS3 Projection Weld Studs for EV Battery Pack Applications

Automotive Standard Fastening Solutions for Electric Vehicle Battery Systems

As electric vehicle (EV) production continues to expand globally, battery pack structures demand fastening solutions that meet strict safety, durability, and automation standards.

DIN 34817 Type TUS3 Projection Weld Studs provide an automotive-standard solution for integrating high-strength threaded anchor points directly into EV battery enclosures, module support frames, and grounding systems.

Designed for resistance projection welding, these studs enable permanent structural attachment without compromising enclosure integrity.

Why DIN 34817 Weld Studs Are Ideal for EV Battery Packs

Electric vehicle battery packs operate under demanding conditions:

• Continuous      vibration and road shock

• Thermal      expansion and contraction

• Moisture      and corrosion exposure

• High-voltage      electrical grounding requirements

• Crash      and impact load compliance

DIN 34817 Type TUS3 studs are engineered to deliver:

• Stable      metallurgical bonding

• High      tensile strength (Class 8.8)

• Consistent      projection collapse during welding

• Reliable      performance in automated production

Their standardized geometry ensures compatibility with robotic welding systems used in EV battery manufacturing lines.

Key Applications in EV Battery Pack Systems

1. Battery Enclosure and Housing Structures

DIN 34817 projection weld studs are welded onto:

• Upper      and lower battery tray panels

• Side      impact reinforcement structures

• Cross-member      support frames

• Structural      mounting brackets

Because projection welding does not require through-holes, the sealing performance of the battery enclosure is improved — a critical factor for IP protection ratings.

2. Module and Cooling Plate Mounting

Inside the battery pack, studs provide threaded anchor points for:

• Battery      module brackets

• Cooling      system supports

• Busbar      mounting components

• Structural      cross supports

The permanent weld eliminates the risk of loosening caused by long-term vibration.

3. High-Voltage Grounding and Electrical Connections

For EV platforms, reliable grounding is essential.

DIN 34817 weld studs can function as:

• Conductive      grounding points

• Electrical      bonding connectors

• Power      distribution mounting supports

Stable torque retention and low contact resistance contribute to long-term electrical reliability.

Technical Characteristics of DIN 34817 Type TUS3 for EV Use

Typical specifications include:

• Material:      19MnB4 or 23MnB4 quenched and tempered steel

• Mechanical      property class: 8.8

• Thread      tolerance: 6g

• Product      grade: A

• Surface      treatment: Zinc plating, Geomet®, Dacromet®, or customized coatings

For EV battery applications, corrosion resistance and salt spray performance are particularly important due to environmental exposure.

Projection Welding Advantages in EV Production

Controlled Heat Input

Projection geometry concentrates current at specific points, reducing overall heat input.

This is beneficial when welding thin sheet materials used in lightweight EV battery enclosures.

Automation Compatibility

Short-cycle welding times (typically 20–100 ms) support:

• Robotic      integration

• High      repeatability

• Consistent      weld penetration

• High-volume      mass production

Structural and Crash Performance

Battery packs are structural components in many EV platforms.

DIN 34817 projection weld studs contribute to:

• Improved      load transfer

• Increased      pack rigidity

• Enhanced      impact resistance

• Long-term      fatigue durability

Quality Assurance in EV Battery Applications

To ensure consistent performance, quality control measures typically include:

• Visual      weld inspection

• Projection      collapse verification

• Torque      testing

• Tensile      pull-out testing

• Parameter      monitoring (current, time, pressure)

Strict process control ensures uniform weld integrity across high-volume EV production.

Supporting the Future of Electric Mobility

As EV platforms demand:

• Lightweight      structures

• High      structural safety

• Intelligent      automated production

• Reliable      electrical performance

DIN 34817 Type TUS3 Projection Weld Studs remain a trusted automotive fastening solution.

From battery enclosure integrity to high-voltage grounding stability, these studs provide the foundation for safe and efficient electric vehicle manufacturing.

Packaging: The inner packaging is a plastic bag, and the outer packaging is a carton. Then the tray. Carton size: 29*19*19.5cm and 23.5*17.5*8, cm and pallet size: 215*100*90cm, or as your request

DIN 34817 vs ISO Automotive Weld Stud Standards

Understanding the Differences in Projection Weld Stud Specifications

In automotive manufacturing, weld studs must comply with strict dimensional and mechanical standards to ensure structural safety and production consistency.

Among the commonly referenced specifications, DIN 34817 Type TUS3 Projection Weld Studs are widely used in European automotive platforms. However, many OEMs and Tier suppliers also refer to ISO-based or internal automotive standards.

Understanding the differences between DIN 34817 and ISO weld stud specifications is essential for global sourcing and platform compatibility.

Overview of DIN 34817 Projection Weld Studs

DIN 34817 defines projection weld studs for resistance-welding applications.

Key characteristics include:

Defined projection geometry

Standardized head and shank dimensions

Thread tolerance class 6g

Mechanical property class typically 8.8

Product grade A dimensional precision

Type TUS3 refers to a specific configuration optimized for automated projection welding in high-volume automotive production.

ISO Automotive Weld Stud Standards

ISO standards typically provide broader global harmonization of:

Mechanical property classes

Thread dimensions

Tolerance systems

Material classifications

However, ISO specifications may not always define projection geometry as thoroughly as DIN 34817, particularly for automotive-specific welding applications.

In many cases, OEMs adopt ISO standards combined with internal welding parameter requirements.

Key Differences Between DIN 34817 and ISO Weld Stud Specifications

1. Projection Geometry Definition

DIN 34817 clearly defines the projection configuration and dimensions optimized for resistance welding.

ISO standards may require supplementary drawings or OEM-specific requirements for projection details.

2. Automotive Platform Adoption

DIN 34817 is historically dominant in European automotive manufacturing.

ISO-based specifications are more frequently referenced in globally harmonized vehicle platforms.

3. Welding Process Optimization

DIN 34817 Type TUS3 studs are engineered specifically for projection welding repeatability.

ISO-compliant studs may require validation to ensure they are projection-compatible with automated welding systems.

4. Sourcing and Validation

When supplying cross-regional platforms:

Material certification must align

Mechanical properties must be verified

Welding validation testing is required

Corrosion protection performance must meet OEM standards

In practice, many automotive suppliers manufacture DIN 34817-compliant studs while ensuring compliance with ISO mechanical properties.

Choosing the Right Standard for Your Automotive Project

When selecting between DIN 34817 and ISO-based weld stud standards, engineering teams should evaluate:

Vehicle platform origin

Welding equipment compatibility

Crash performance requirements

Corrosion resistance specifications

Global supply chain alignment

For EV battery packs and structural assemblies, projection weld consistency and dimensional precision are often more critical than the nominal standard reference alone.

Conclusion

Both DIN 34817 Type TUS3 and ISO automotive weld stud standards play important roles in modern vehicle manufacturing.

The key to successful implementation lies in the compatibility of the welding process, compliance with mechanical properties, and rigorous quality validation.

For automotive manufacturers, selecting the correct weld stud standard is not simply a specification decision — it is a structural safety decision.

Why Choose a Professional DIN 34817 Type TUS3 Projection Weld Stud Manufacturer?

Automotive-Grade Welding Fasteners Backed by 23 Years of Experience

In automotive manufacturing, weld studs are not commodity fasteners. They are structural components directly impacting vehicle safety, crash performance, and production efficiency.

Choosing a qualified DIN 34817 Type TUS3 Projection Weld Stud manufacturer is critical to ensuring long-term reliability and consistent weld performance.

The Importance of Manufacturing Expertise

Projection weld studs require:

• Precise      projection geometry

• Controlled      material composition

• Consistent      mechanical properties

• Accurate      dimensional tolerances

Even minor variations in projection height or material hardness can affect weld penetration and joint strength.

An experienced manufacturer understands the relationship between:

• Stud      geometry

• Welding      current

• Weld      time

• Substrate      thickness

• Collapse      behavior

This process knowledge ensures stable performance in automated automotive production lines.

What to Look for in a DIN 34817 Weld Stud Supplier

1. Material and Mechanical Compliance

• 10B21,      19MnB4 or 23MnB4 quenched and tempered steel

• Mechanical      property class 8.8，10.9

• Verified      heat treatment process

• Thread      tolerance 6g

Material traceability is essential for automotive applications.

2. Welding Performance Validation

A reliable supplier should provide:

• Projection      dimension control

• Weld      parameter recommendations

• Torque      and tensile test data

• Salt      spray and corrosion testing

Consistency in weld collapse and fusion quality directly impacts structural safety.

3. Production Capacity and Automation Compatibility

Automotive production requires:

• High-volume      capability

• Stable      process control

• Dimensional      repeatability

• Batch-to-batch      consistency

Manufacturers must support robotic welding environments without variability.

23 Years of Industrial Fastener Manufacturing Experience

With 23 years of expertise in industrial and automotive fasteners, JUXIN provides DIN 34817 Type TUS3 Projection Weld Studs engineered for:

• Body-in-White      structural assemblies

• Chassis      and suspension systems

• EV      battery pack enclosures

• Electrical      grounding applications

Our production processes emphasize:

• Strict      dimensional inspection

• Heat      treatment control

• Projection      geometry precision

• Consistent      surface treatment quality

In automotive applications, reliability is not optional — it is mandatory.

Long-Term Value Beyond Price

Selecting a professional DIN 34817 weld stud manufacturer reduces:

• Weld      defects

• Production      downtime

• Field      failure risks

• Rework      and recall exposure

The true cost of a weld stud is not its unit price — it is its structural performance across the vehicle lifecycle.

Partner With an Experienced Automotive Weld Stud Supplier

If your project requires DIN 34817 Type TUS3 Projection Weld Studs for structural or EV applications, working with an experienced manufacturer ensures:

• Compliance

• Stability

• Production      efficiency

• Long-term      reliability

Contact our engineering team to discuss your automotive fastening requirements.