High-Strength and Heat-Resistant Fasteners for New Energy Vehicles

High-Strength and Heat-Resistant Fasteners for New Energy Vehicles

Professional high-strength screws, nuts, rivet nuts, and heat-resistant fasteners for new energy vehicles (NEVs). Reliable solutions for battery packs, engines, chassis, and EV structural assemblies. Trusted by global NEV manufacturers.

1. Overview of Vehicle Fastening Methods

Modern vehicle assembly relies on multiple fastening solutions, including bolts, screws, double-headed studs, and nuts, as well as self-tapping screws for pre-drilled holes. Snap pipe clamps, ring clamps, and locking mechanisms are also widely used to secure wiring, tubing, and other critical components.

Fastener Color Selection

• Match the fastener color to the clamped part. For hidden      components, silver-white finishes are typically recommended.

Corrosion Protection and Mechanical Grade

• Fasteners are selected based on corrosion resistance      requirements.

• For fasteners with mechanical properties above grade 8.8, avoid      galvanized passivation; use non-electrolytic zinc coatings.

• Hard components above 350 HV (e.g., spring washers) should      avoid galvanized passivation to prevent hydrogen embrittlement.

Mechanical Grade Matching

• Grade 8 nuts → 8.8-grade bolts, studs, or screws

• Grade 10 nuts → 10.9-grade bolts, studs, or screws

• Grade 12 nuts → 12.9-grade bolts, studs, or screws

• Higher-grade nuts may replace lower-grade nuts where      applicable.

 Related Page: High-Strength Bolts for Automotive Applications

2. Key Factors in Fastener Selection

When designing or selecting fasteners, consider:

• Fastening performance and assembly efficiency

• Ease of after-sales service

• Aesthetic requirements

• Cost-effectiveness

Selection Process for Engineers:

1. Identify connection type: tensile, shear, or combined.

2. Determine working load on the fastener.

3. Calculate axial and tangential loads.

4. Determine minimum clamping force.

5. Verify clamped part face pressure to prevent deformation.

6. Select the appropriate fastener size and grade.

 Related Resource: Fastener Selection Guidelines

3. Innovative Fastening Solutions for NEVs

As the demand for new energy vehicles (NEVs) grows, reliable fastening solutions are crucial. Juxin Fasteners provides high-strength screws, nuts, and rivet nuts that meet the latest NEV standards.

• Rivet Nuts: Ensure secure locking,      even in harsh environments.

• Zinc-Nickel Alloy Coating: Provides      corrosion resistance and electrical conductivity.

• Verified Quality: Fully tested to      meet NEV performance requirements.

Engineers and designers can rely on Juxin Fasteners for standard or custom NEV fastening solutions, including battery packs, motors, engines, and structural assemblies.

Related Product: Rivet Nuts for NEVs

Contact Us: sales@jxfastener.cn

4. High-Strength and Heat-Resistant Bolts in NEVs

Ultra-high-strength fasteners reduce vehicle weight while increasing safety and structural integrity. Common steel materials include 10B33, SCr440 (40Cr), SCM435 (35CrMo), and SCM440 (42CrMo), producing 8.8, 9.8, and 10.9-grade bolts, with ultra-high-strength bolts up to 1400 MPa (14.9).

Lightweight Vehicle Benefits:

• Smaller bolt holes and reduced weight of connected components

• Critical for battery packs, powertrains, engines, gearboxes,      and axles

Application Examples:

• Engine: connecting rods, cylinder head connections, primary      bearings, flywheels

• Chassis: bearing connection bolts reduced from 4 × M12 → 3 ×      M10

• Battery Packs: module bolts reduced from M8 → M6, pack body      bolts M10 → M8

 Related Product: Ultra-High-Strength Bolts

5. Connection Design Considerations for NEV Fasteners

Designers must account for:

• Bolt size, material, tolerance, and mechanical properties

• Environmental factors: temperature extremes, vibration,      corrosion, thermal cycling

Non-Quenched and Tempered Steel Advantages:

• Energy-efficient, cost-effective, and environmentally friendly

• Cold-work strengthened with duplex structures (ferrite +      pearlite, ferrite + bainite, ferrite + martensite)

Standards and Grades:

• National standards: MFT8, MFT9, MFT10

• SCN430 and SCN435: used for 8.8-grade fasteners

Example:

• 8.8-grade long studs (M6×840, M8×675, M6×930) for battery pack      assemblies made from MLF20MnVNb steel

• Fatigue limit σ-1 (5 million cycles): 86–101 MPa

• Straightness ≤0.5 mm/m

 Related Resource: NEV Battery Pack Fastening Solutions

6. Heat-Resistant Steel and Nickel Alloy Fasteners

High-temperature NEV applications require heat-resistant fasteners to prevent connection failures under thermal stress.

Materials:

• ML06Cr15Ni25Ti2MoAlVB (GH2132), ML04Cr11Nb, ML41CrMoV,      ML21CrMoV, 14Cr17Ni2, NiCr20TiAl (GH4080A), Inconel718 (GH4169)

Design Considerations:

• Correct heat treatment ensures maximum strength and thermal      resistance

• High-strength fasteners reduce fastener size and weight while      improving structural compactness and heat dissipation

Applicable Standards:

• T/CSAE99-2019: Heat-Resistant Steel for Automotive Fasteners

• T/CSAE136-2020: High-Temperature Automotive Fasteners

• GB/T3098.24-2020: Stainless Steel & Nickel Alloy Fasteners

• GB/T3098.25-2020: Selection Guidelines for Stainless &      Nickel Alloy Fasteners

 Related Product: Heat-Resistant Fasteners

7. Future Trends: Smart Fasteners in NEVs

Next-generation fasteners integrate AI, machine learning, big data, and IoT to:

• Improve quality control and prevent failures during design,      forming, heat treatment, surface treatment, and assembly

• Reduce risks and failure rates

• Enhance NEV safety, performance, and reliability

Conclusion:
Juxin Fasteners delivers high-performance, lightweight, and reliable fastening solutions for the evolving NEV industry, supporting engines, motors, battery packs, chassis, and full-vehicle assemblies.

Contact Juxin Fasteners: sales@jxfastener.cn