SCHNORR safety washers can be made from different materials and are available with various surface finishes.

SCHNORR safety washers are used in many industries, including automotive, machinery, plant engineering, conveyors, and electrical applications. They are suitable wherever reliable fastener locking is required. SCHNORR safety washers are used, for example, in lawn mowers, textile machinery, machine tools, and many other applications.

SCHNORR safety washer materials can be categorized into: standard materials, special requirement materials, corrosion-resistant materials, high-temperature resistant materials, anti-magnetic and corrosion-resistant materials, and materials with excellent resistance to extreme high temperatures and corrosion.

1.Schnorr safety washer standard material

C60S(1.1211)

Special steel complying with DIN EN 10132-4. Our company **uses this material to manufacture safety washers and DIN6796 washers.

·C67S (1.1231) und C75S (1.1248):

Used as raw material for Category One disc springs (t<1.25mm) and "K" series disc springs in accordance with DIN2093 specifications.

· 51CrV4 (1.8159):

Chrome-vanadium alloy steel (DIN 10132-4 or DIN10089) is used as raw material for Category Two disc springs (1.25mm<t<6.0mm).

Raw material for Category Three disc springs (>6.0mm). However, it must first be forged into blanks, and then the inner and outer surfaces are machined using specialized machine tools.

2.Schnorr safety washerSpecial requirement materials

Suitable for harsh environments such as corrosion and high temperatures.

These materials have lower tensile strength and insufficient total height, resulting in lower load capacity.

Caution is required before use.

3.Schnorr safety washerCorrosion-resistant materials

· X10 CrNi 18-8 (1.4310):

Chrome-nickel alloy steel (DIN EN 10151) is a general-purpose disc spring material (t<3.0mm), but it is magnetic.

· X7 CrNiAl 17-7 (1.4568):

Hardened alloy steel (DIN EN 10151). It is magnetic due to cold rolling processing, with thickness <2.5mm.

· X5 CrNiMo 17-12-2 (1.4401):

Strength is lower than the previous two types, but it offers better corrosion resistance and low magnetism.

Small batches are not available on the market, so small-scale sampling is not possible.

4.Schnorr safety washerHigh-temperature resistant materials -- Not suitable for corrosive environments

· X22 CrMoV 12-1 (1.4923):

Chromium-molybdenum-vanadium alloy (DIN EN 10269) is suitable for quenching and tempering.

Commonly used high-temperature resistant material

· X39 CrMo 17-1 (1.4122):

Chromium-molybdenum alloy ((DIN EN 1088-2) is suitable for quenching and tempering.

Commonly used high-temperature resistant material

The above two materials are not suitable for corrosive environments.

5.Schnorr safety washersNon-magnetic and corrosion-resistant materials

· CuSn 8 (2.1030):

Bronze alloy containing copper and tin. (DIN EN 1654)

Material strength and load capacity are inferior to standard spring steel.

· CuBe 2 (2.1247):

Beryllium copper alloy (DIN EN 1654) is suitable for near-zero temperature applications.

Copper alloys are non-magnetic, have excellent electrical conductivity, and offer a wide range of corrosion resistance.

6.Schnorr safety washersMaterials with excellent resistance to extreme high temperatures and corrosion

These materials have nickel as the main component and offer excellent corrosion resistance. However, they are expensive,

and difficult to obtain in the material market.

Under extreme high temperature and high tension, creep occurs over time, resulting in reduced assembly height and decreased load.

Exposure time at extreme high temperatures must be shortened. The operating temperatures listed in the P.38-39 material analysis table are for reference only.

Moreover, the maximum operating temperature cannot be indicated.

· NiCr 20 Co 18 Ti (NIMONIC 90) (2.4632):

Retains considerable elastic strength at high temperatures, making it very suitable for high-temperature applications.

· NiCr 15 Fe 7 TiAl (INCONEL X 750) (2.4669) und NiCr 19

NbMo (INCONEL 718) (2.4668): Cobalt-free composition, widely used in nuclear, biological, and chemical technology.

If other special materialsSchnorr safety washersare required, please contact our company.