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Steel Extension Spring Extended Tension Spring Wire Diameter 2.0-5.0

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Steel Extension Spring Extended Tension Spring Wire Diameter 2.0-5.0

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Unit Price

Price

Price range: $0.85 – $5.84

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Price range: $0.85 – $5.84

Total:

Price range: $0.85 – $5.84

Steel Extension Spring Extended Tension Spring Wire Diameter 2.0-5.0 Description

  1. Performance
    • High-Carbon Spring Steel Core – Coiled from ASTM A228 music-wire or EN 10270-1 grade SH with tensile strengths of 1 400–1 900 MPa (wire Ø2.0–5.0 mm). Oil-tempered and stress-relieved at 250 °C for outstanding elasticity and minimal permanent set after repeated elongation.
    • Precise Force Characteristics – Outer diameters Ø20–30 mm and active‐coil counts tailored to deliver spring rates from 10 N mm⁻¹ to 80 N mm⁻¹, with built-in initial tension up to 15 % of maximum working load to ensure tight closure in the neutral position.
    • Shot-Peened Surface – Introduces compressive residual stresses that boost fatigue life by 40 % and increase resistance to micro-crack propagation under cyclic loading.
    • Broad Operating Window – Maintains linear force output from −40 °C to +120 °C; modulus variation <3 % across this range guarantees predictable behavior in outdoor, automotive, and industrial environments.
  2. Application Scenarios & Assembly Requirements
    • Industrial Mechanisms – Counterbalances for access hatches, conveyor take-ups, and vibratory feeders rely on the Ø3–5 mm series for high stored energy and compact packaging.
    • Automotive & Transport – Door checks, seat recliner linkages, and trailer ramp assists use medium-diameter springs to offset panel weight and provide controlled rebound.
    • Agricultural & Construction Equipment – Tensioners for chain drives and belt systems benefit from corrosion-protected variants when exposed to dust, slurry, or de-icing agents.
    • Assembly Guidelines:
    – End Style Selection: choose machine loops or extended hooks for general duty; swivel or threaded inserts for precise preload adjustment.
    – Maximum Extension: limit travel to 85 % of elastic range (≈ L₀ + 0.8 × ΔL_solid) to prevent loss of initial tension.
    – Safety Cables: when installed overhead, route a secondary cable through the coil to retain fragments if failure occurs.
    – Loop Alignment: maintain ≤ 5° angular misalignment between spring axis and attachment pins to avoid side loading.
  3. User-Friendly Operation
    • Pre-Set & Color-Coded – Factory scragging removes early relaxation; epoxy color bands on hooks identify spring rate and free length, simplifying on-site matching.
    • Ready-to-Install Finish – Lightly oiled black-oxide or zinc-phosphate coating protects against rust during storage and handling without flaking or contaminating adjacent parts.
    • Tool-Lite Replacement – Installation requires only basic hand tools (combination wrench or locking pliers); hooks engage standard eye bolts or clevis pins in seconds.
    • Low-Maintenance Service – No lubrication needed after assembly; periodic visual inspection for coil stretch or surface corrosion suffices for multi-year deployments.
  4. Quality & Longevity
    • ISO 9001 / IATF 16949 Production – Statistical process control on wire drawing, coiling pitch, and heat treatment keeps load tolerance within ±7 % and free-length tolerance within ±1 mm.
    • Endurance Validation – Sample springs cycled 500 000 times at 60 % of maximum rated extension show <4 % load decay and no hook deformation, meeting stringent fatigue criteria for safety-critical applications.
    • Protective Coatings & Compliance – Optional epoxy-powder topcoat extends salt-spray resistance to >144 h; all variants are RoHS & REACH compliant, free from hexavalent chromium and heavy-metal additives.
    • Full Traceability – Each spring carries a laser-etched batch code linking to 3.1 material certificates and load/deflection curves, ensuring reliable documentation for OEM and maintenance records.

Additional information

Wire Diameter（mm)

2.0, 2.5, 3.0, 4.0, 5.0
Spring Outer Diameter(mm)

20, 25, 30
Spring Length(mm)

100, 110, 120, 130, 140, 150, 160, 170, 180, 190, 200, 220, 250, 300, 60, 70, 80, 90
Material

Carbon Steel, Spring steel
Manufacturer

GUXIANG
Package Size(cm)

30*20*20
Shipping Term

EXW Guangdong Province
SKU

1，000,000 pieces

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