Grade 5 Titanium Coil Springs

Grade 5 Titanium Coil Springs

  • Material: Genuine Grade 5 (Ti-6Al-4V) | No soft Grade 2.
  • Weight: 40-50% Lighter than Steel (Density 4.51 g/cm³).
  • Custom Specs: Wire Ø 0.1mm – 20mm | Custom OD, Pitch & Rate.
  • Fatigue Life: Mirror Polished (Ra < 0.4µm) & Vacuum Stress Relieved.
  • Service: MOQ 100 pcs | 7-10 Day Prototyping | MTC Provided.

Product Overview

Lightweight Dynamics. Zero Corrosion. Aerospace Grade.

Engineers choose our Grade 5 Titanium Coil Springs (Ti-6Al-4V) for one reason: to solve the weight and corrosion problems that steel cannot.

With a density of just 4.51 g/cm³, these springs offer a 40-50% weight reduction compared to steel equivalents. For racing applications, this means significantly reduced unsprung mass and faster suspension response. For industrial valves, it means total immunity to seawater and chloride attack, eliminating maintenance costs.

Not All Titanium is Created Equal. We do not use commercial purity titanium (Grade 2), which is too soft for dynamic loads. We exclusively manufacture with ASTM B863 compliant Ti-6Al-4V alloy, ensuring high yield strength (≥828 MPa) and resistance to “sagging” or setting over time.

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Key Technical Specifications

Design Note: Use these values for FEA or stiffness calculations. Do not use steel parameters.

Property Value / Description Standard
Material Grade Grade 5 (Ti-6Al-4V) ASTM B863 (Wire)
Density 4.51 g/cm³ (approx. 56% of Steel)
Tensile Strength ≥ 895 MPa (130 ksi) ASTM E8
Shear Modulus (G) 40 – 44 GPa (Critical for Rate Calc)
Elastic Modulus (E) 110 – 114 GPa
Max Operating Temp ~350°C (660°F)
Corrosion Rate 0.00 mm/year (Natural Seawater) ASTM G31

Titanium’s Shear Modulus (G) is roughly half that of steel (~42 GPa vs ~80 GPa). If you copy a steel spring’s dimensions exactly, the titanium version will be 50% softer. To maintain the same spring rate, we usually need to increase wire diameter or reduce coil count. Need a conversion? Upload your steel spring drawing below, and we will redesign it for you.

Surface Finishes & Colors

  1. Mirror Polished (Standard)
    • Ra < 0.4µm. Removes surface stress risers to maximize fatigue life. Essential for valves & suspension.
  2. PVD Gold (TiN)
    • Titanium Nitride ceramic coating. High wear resistance and premium gold aesthetics.
  3. DLC Black
    • Diamond-Like Carbon. Extremely low friction coefficient and stealthy matte look.

Typical Applications

  • Racing Suspension: Coilovers, Valve Springs (Reduced unsprung weight).
  • Marine Equipment: Check valves for desalination & subsea (Zero corrosion).
  • EDC & Gadgets: Tactical pens, Knives, Bicycle shocks.

Quality Assurance Process

  1. Material Verify: Spectrometer check for Ti, Al, V composition and Fe impurities.
  2. CNC Coiling: Precision multi-axis coiling for exact Pitch and OD control.
  3. Vacuum Stress Relief: ~540°C Annealing to remove internal stress and prevent setting.
  4. MTC Provided: Full Mill Test Certificate provided with every shipment.

Frequently Asked Questions (FAQ)

Q: Can I just order a titanium spring using my steel spring’s part number?

A: No. Due to the difference in modulus, the design must be adjusted to achieve the same load. Please send us the steel spring specs, and we will calculate the titanium equivalent.

Q: What is the lead time for 100 custom springs?

A: Typically 7-10 working days for prototyping after drawing approval.

Q: Is your “Gold” finish paint or plating?

A: It is PVD (Physical Vapor Deposition) Titanium Nitride. It is a hard ceramic bonding, far more durable than paint, and will not peel off.

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