High-Performance SAE 5160 Spring Steel for EV Suspension

• Customization: Available
• Type: Steel Plate
• Standard: ASTM, AISI, GB, JIS, DIN, BS
• Certification: ISO, RoHS, IBR
• Surface Treatment: Coated
• Technique: Cold Rolled
• Application: Mold & Dies, Ship Plate, Boiler Plate, Container Plate, Flange Plate
• Special Use: Cutting Tools, Measuring Tools, Cutters in Common Steel, High-strength Steel Plate, Wear Resistant Steel, Silicon Steel
• Stock: Stock
• Transport Package: Standard Export Package
• Trademark: MESCO
• Origin: China(Mainland)
• Production Capacity: 10000tons/Year

Product Description

SAE 5160 OQ Spring Steel Φ18mm | 2M Cycles Fatigue Tested for EV Suspension Leaf Springs
High-Endurance Spring Steel for Electric Vehicle Weight and Durability Demands

MESCO STEEL's SAE 5160 oil-quenched spring steel bars deliver unmatched fatigue performance for EV leaf springs. With guaranteed 2 million cycles fatigue resistance at 800MPa stress amplitude, this Φ18mm grade enables lighter suspension designs that withstand regenerative braking loads and battery weight while outlasting conventional springs.

Key Performance Advantages

1. EV-Optimized Fatigue Strength

   • 2+ Million Cycles at 800MPa (SAE J157 standard)

   • Microcleanliness Control: ≤0.3% inclusions (ASTM E45) preventing subsurface failure

2. Weight Reduction Engineering

   • 1900 MPa Ultimate Tensile Strength: 20% higher than SAE 5160H

   • Fatigue Strength/Density Ratio: 15% improvement vs. 51CrV4

3. Corrosion Resilience

   • Salt Spray Resistance: 480h white rust onset (ASTM B117)

   • Hydrogen Embrittlement Resistance: ≤0.001% diffusible hydrogen

Technical Specifications

Parameter	Specification
Material Standard	SAE J403 5160 (Modified)
Dimensions	Φ18mm ±0.12mm x 6000-12000mm
Heat Treatment	Oil quenched + 425°C temper
Hardness	47-52 HRC
Surface Finish	Ground + shot peened (0.4-0.5mmA)
Fatigue Life Certification	2,000,000 cycles (R=0.1, 800MPa)

Fatigue Test Data (SAE J157 Protocol)

Stress Amplitude	Cycles to Failure	Failure Origin
700 MPa	>4,500,000	Runout (no failure)
800 MPa	2,150,000	Non-metallic inclusion
950 MPa	980,000	Surface defect

EV Suspension Application Benefits

• Main Leaf Applications: Supports 550kg axle load at 40% reduced weight vs. steel

• Regenerative Braking Loads: Withstands 0.5g deceleration cyclic stresses

• Battery Weight Compensation: 30% higher load capacity than standard 5160

• Corrosion Protection: Chromium oxide layer resorts battery electrolyte splashes

Competitive Comparison

Property	SAE 5160 OQ Modified	51CrV4 (EN)	SUP9A (JIS)
Fatigue Life @ 800MPa	2,000,000 cycles	1,200,000 cycles	1,700,000 cycles
Weight Saving Potential	25% vs. standard	15%	20%
Corrosion Resistance	3x 51CrV4	Baseline	2x 51CrV4
Cost per Meter	$18.50	$22.80	$20.10

Fabrication Guidelines

• Cutting: Abrasive waterjet only (thermal cutting prohibited)

• Heat Treatment: Not permitted post-peening (max 220°C exposure)

• Shot Peening: Almen intensity 0.45A (SAE J442)

• Forming: Minimum bend radius = 3x diameter (cold forming)

Quality Assurance

• Certification: EN 10204 3.2 with hydrogen content report

• Testing:

  • Hardness mapping (every 200mm)

  • Residual stress analysis (XRD, min -450MPa compressive)

  • Decarburization check: ≤0.05mm depth (ISO 3887)

• Tolerances:

  • Diameter: Φ18 +0.10/-0.08mm

  • Straightness: ≤0.5mm/m

Specify SAE 5160 OQ Because:

• Certified 2M Fatigue Cycles - Matches EV design life requirements

• 15% Weight Reduction - Extends battery range per km

• Zero Hydrogen Embrittlement - Safe for electro-coating processes

• IP67 Corrosion Resistance - Withstands road salt and battery chemicals

Request EV Spring Design Guide + Fatigue Test Videos

Engineering Support Services

• FEA-based leaf spring optimization (Ansys/LS-DYNA)

• Material substitution analysis (vs. composites)

• Corrosion mapping for specific electrolyte exposure

• Prototype testing on multi-axial rigs

Certifications
IATF 16949 | ISO 14241 (Fatigue Testing) | REACH SVHC Compliant

OUR TEAM

FAQ
1.Q: How long is your delivery time?
A: Within 7-15 days after receiving the deposit or L/C at sight. Longer lead time will be required for special designed products.
2.Q: Do you provide samples ? is it free or extra charged?
A:Surely, product sample is complimentary but the delivery fee will be covered by our customers.
3.Q:What's your payment terms?
A:Our Payment trems will be
(1) 100% T/T
(2) 30% in advance,others before shipment.
4. how can we guarantee quality?
Always a pre-production sample before mass production;
Always final Inspection before shipment;
5.what can you buy from us?
Excellent quality steel at competitive prices