Belleville Washer Material Guide

It is imperative to select the right washer material type to ensure your Belleville washers hold up to your specific application requirements. Established in 1949, Solon Manufacturing Co. designs and manufactures Solon Belleville Springs, disc springs (DIN EN 16983 & DIN EN 16984), and washers, in multiple materials for use in a variety of applications across many different environments. We can fill large orders and custom manufacture washers in a wide variety of standard materials (6150, Inconel 718, 17-PH Stainless Steel, 301 Stainless Steel, H-13 Tool Steel) and exotic materials (510 Phosphor Bronze, 1704 Stainless Steel, Inconel X750, A286, Custom 450).

Learn about our product offering below, view our Product Material Guide or Contact a Solon Expert with any questions you have.

Consideration for Belleville Material Selection

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

Standard Belleville Washer Materials

6150 Alloy

• Operating temperature range
  • -40°F / -40°C to 350°F / 177°C
• For indoor/outdoor service, electrical and corrosive atmospheres
• Abrasion-resistant | Fully magnetic
• Suitable for many general engineering applications requiring high tensile strength and toughness.
• Specific Applications: Typically used in a closed system with oil or grease contact.
• Standard finish: Mechanically Zinc Plated with Trivalent Chromate (ASTM B695, Class 12, RoHS compliant)
  • Also available with scale-free, oil finish, or a Zinc Phosphate and oil finish.

Inconel 718

• Operating temperature range
  • -400°F / -240°C to 1100°F / 594°C
• Specific Applications: Inconel 718 is ideal for corrosive environments in which there is contact with drilling mud, sour gas or for non-magnetic applications. It is also ideal for indoor/outdoor service and high-temperature applications or corrosive atmosphere.
• Specific Applications
• Non-magnetic
• Available in NACE MR0175 Condition
• Standard finish: Scale-free plain finish

H-13 Tool Steel

• Operating temperature range
  • Ambient to 1100°F / 594°C

• This is the most commonly used material for our Flange Washers due to its excellent strength and working temperature range, of ambient to 1100°F.
• For indoor/outdoor service and high-temperature atmospheres
• Fully magnetic
• Finish: Natural finish with light oil-coat

17-7PH Stainless Steel

• Operating temperature range
  • -320°F / -200°C to 550°F / 288°C

• Working temperature range
  • -400°F to 550°F
• For indoor/outdoor service, electrical and corrosive atmospheres
• Not recommended for extreme chloride or fluoride applications without plating or reduced stresses
• Suitable for cryogenic applications & applications when bolt loads are much lighter.
• Highly magnetic 
• Standard material condition TH1050 per AMS 2759/3
• Alternate available material conditions
  • TH1075
  • RH950
  • CH900
• Standard finish: Scale-free plain finish
  • Also available: Sulfamate nickel plated (AMS 2424)

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 due to work hardening 

Standard finish: Scale-free plain finish

Materials Available by Product

Solon Disc Springs (SDS)

• Available in Carbon Steel, 17-7 PH Stainless Steel, 301 Stainless Steel and Inconel. Carbon steel disc springs are finished with the standard corrosion protection of phosphate & oil.
• 50 CrV 4 (6150 Alloy Equivalent)
• 17-7 PH Stainless Steel
• Stainless Steel 301
• Inconel 718

Flange Washers

• Typical flange washer materials are H-13 Tool Steel, 17-7 PH Stainless Steel, Inconel 718, 17-4, Waspaloy, Custom 450, etc.
• 17-7PH
• 718
• H-13 Tool Steel
• 17-4 Stainless Steel
• Waspaloy
• Custom 450

Imperial Washers

• 17-7PH
• 301
• 718
• 6150 Alloy

Metric Washers

• 17-7PH
• 301
• 718
• 6150/1074
• H-13

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. 

Contact Solon For Solon Washer Material Inquiries

Contact us for more information regarding our Belleville springs and washers today.