DIN 6796 Carbon Steel Disc Spring Washer

description

1. High-Load, Self-Compensating Spring Performance
   • Formed to DIN 6796 from quenched-and-tempered alloy or high-carbon spring steel (60Si2MnA / 51CrV4), each conical washer delivers a predictable load–deflection curve with spring-rate tolerances held to ±10 %.
   • Typical hardness 42 – 48 HRC enables elastic energy densities up to three times greater than flat washers, maintaining bolt preload after joint settling, thermal expansion, or vibration.
   • A ≥ 8 µm electro-zinc layer sealed with trivalent passivation protects against red rust for ≥ 120 h neutral salt-spray (ISO 9227); optional clear, yellow, black, olive or any RAL / Pantone top-coat pushes corrosion life past 1 000 h and supports visual size or circuit coding.
   • Shot-peened surfaces introduce compressive residual stress, extending fatigue endurance beyond 2 × 10⁶ cycles at 75 % of maximum deflection—ideal for shock-loaded joints.
2. Broad, Cross-Industry Application Spectrum
   • Power Generation & Turbomachinery: Maintains bolt tension on turbine casings, generator end shields and gearbox flanges despite vibration and temperature swings.
   • Oil, Gas & Chemical Processing: Live-loads pump and valve gland followers, preventing leakage during pressure fluctuations and thermal cycling.
   • Automotive, Rail & Off-Highway Vehicles: Compensates for settling in suspension brackets, brake callipers and driveline couplings exposed to road shock, impact and corrosive environments.
   • Construction, Mining & Heavy Equipment: Absorbs impact loads in crusher housings, excavator boom pivots and hydraulic pump mounts where downtime is costly.
3. Installer-Friendly, Space-Saving Handling
   • Chamfered inner/outer edges prevent scoring when sliding over studs; orientation marks on the rim guide rapid stacking (series or parallel) without calipers.
   • Direct substitution for plain washers—existing torque values remain valid while the spring action automatically compensates for gasket creep, paint thickness or thermal growth.
   • Slim height-to-load ratio produces high clamp forces in confined spaces, often eliminating bulky Belleville stacks or hydraulic tensioners.
   • Available loose, shrink-wrapped in columns, or tape-and-reel for automated feeders; optional PTFE-free dry-film lubricant reduces installation friction and galling on coated or stainless fasteners.
4. Certified Quality & Long-Term Durability
   • 100 % optical inspection verifies thickness ±0.02 mm, cone angle ±0.25°, parallelism ≤0.05 mm, and free height ±0.1 mm; statistical Cp/Cpk ≥ 1.33 data support ISO 9001, IATF 16949 and AS 9100 quality systems.
   • Post-forming stress-relief temper removes residual stresses, preserving ductility for repeated service disassembly and re-torque cycles.
   • Duplex-coated variants (zinc + epoxy powder) withstand 1 000 h xenon-arc weathering and 200 °C bake without flaking or colour shift, suitable for outdoor, offshore and mildly chemical environments.
   • Each production lot is QR-coded for full traceability to melt chemistry, heat treatment, coating bath and load-deflection charts, giving engineers confidence in safety-critical applications across industries.