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Belleville Spring Material & Finishing Guide

Established in 1949, Solon Manufacturing Co. designs and manufactures Solon Belleville Springs, disc springs (DIN EN 16983 & DIN EN 16984), and washers, that are used in a variety of applications across many different environments. From low-carbon steel  to exotic metals, Solon Manufacturing Co. offers a variety of materials to satisfy your applications’ needs.

Consideration for Belleville Material Selection:

  • Bolt Material
  • Temperature
  • Environment
  • Application
  • Cost
  • Availability

Belleville Material Selection

17-7PH STAINLESS STEEL
ASTM A693

  • Operating temperature range
    • -400°F / -240°C to 550°F / 288°C
  • For indoor/outdoor service, electrical and corrosive environments
    • Not recommended for extreme chlorine or fluoride applications without plating or reduced stresses
  • Suitable for cryogenic applications
  • Highly magnetic 
  • Standard material condition - Solon Proprietary Condition results in improved spring properties and corrosion resistance: Rockwell Hardness RC 38-43
  • Alternate available material conditions
    • TH1050: Rockwell Hardness RC 38-44
    • TH1075: Rockwell Hardness RC 37-42
    • RH950: Rockwell Hardness RC 46-49
    • CH900: Rockwell Hardness RC 49
  • Standard finish: Scale-free plain finish
    • Also available: Sulfamate Nickel plated (AMS 2424D)

301 STAINLESS STEEL
ASTM A666

  • Operating temperature range
    • -400°F / -240°C to 550°F / 288°C
  • For indoor/outdoor service, electrical and corrosive atmospheres
  • Slightly magnetic
  • Material Hardness RC 36-45
  • Standard finish: Scale-free plain finish

510 PHOSPHOR BRONZE
ASTM B103

  • Operating temperature range
    • -400°F / -240°C to 300°F / 150°C
  • For use with copper bus and silicon bronze bolts and nuts
  • For non-magnetic requirements and good electrical conductivity
  • Extremely durable
  • Non-magnetic
  • Standard finish: Scale-free plain finish

AISI 6150 ALLOY (ASTM A506) / 1074 CARBON STEEL (ASTM A684)

  • Operating temperature range
    • -40°F / -40°C to 350°F / 177°C
  • For indoor/outdoor service, electrical and corrosive atmospheres
  • Abrasion-resistant
  • Suitable for many general engineering applications requiring high tensile strength and toughness
  • Fully magnetic
  • Standard finish: Mechanically Zinc Plated with Trivalent Chromate (ASTM B6595, Class 12, RoHS compliant)
    • Also available with scale-free, oil finish, or a Zinc Phosphate and oil finish

INCONEL 718
ASTM B637

  • Operating temperature range-400°F / -240°C to 1100°F / 594°C
  • For indoor/outdoor service and high-temperature applications or corrosive atmospheres
  • Non-magnetic
  • Available in NACE MR0175 Condition
  • Standard finish: Scale-free plain finish

H-13 TOOL STEEL
ASTM A681

  • Operating temperature range
    • Ambient to 1100°F / 594°C
  • For indoor/outdoor service and high-temperature atmospheres
  • Fully magnetic
  • Finish: Black Oxide AMS 2485K (BOOC)
H-13 Tool Steel ASTM a681
Additional materials available include 17-4, X750, A286, Custom 450, Waspaloy and other exotic materials available upon request.

FINISHING

In addition to zinc plating, Solon offers other finishing methods to protect parts such as nickel plating, yellow chromate, black oxide, and oil coatings. Natural finish, as well as custom finish are also available options.

MECHANICAL PLATING

Mechanical plating is also available. Mechanical plating’s greatest advantage is its ability to overcome hydrogen embrittlement problems. This is especially important for work pieces that have a hardness greater than HRC 40, while still offering equivalent corrosion protection of electroplating. Mechanical plating is normally applied to carbon steel springs.
 

DEBURRING

Substantially, all of Solon® Belleville Springs and washers are deburred to the Solon Manufacturing Co. standard radius specification. Belleville springs and washers with a thickness greater than .312 will typically have a machined radius. H-13 Flange Washers will have machined contact points at load bearing corners.