Technical Information - hardened Spring Steel 1095

Basic information and applications 1095

With a carbon content of over 1%, this material is very well suited for feeler gauges and underlay foils as well as for highly stressed springs, which are not subject to any corrosion requirements.

Further areas of application are wear strips, pressure knives & valves in shock absorbers.

In DIN EN 10 132-4 the 1095 is approved as a material for springs.

Compared to the materials 1.1231 (C67S), 1.1248 (C75S) and 1.1269 (C85S), which have a lower carbon content, the material 1095 is also suitable for high mechanical loads and has a high fatigue strength. It is the only carbon steel used for shock absorber valves and leaf valves.

If there is a risk of corrosion and the highest mechanical stress requirements, we recommend material 1.4031.

Delivery condition

Structure: hardened and tempered (martensitic structure)

Surface: white polished, roughness class Ra (please ask)

Tensile strength: depending on the thickness from 1600-1800 to 2000-2200 N / mm²

Flatness: usually P2=0,3% of the bandwidth

Tolerances

Thickness tolerance: T3

Width tolerance: B2

Straightness: normal

mechanical Details

Elongation limit Rp0.2: about 90% of the tensile strength

Elongation A80: no values ​​available

Fatigue limit: high fatigue limit, suitable for shock absorbers or leaf valves

With good edge processing after cutting (e.g. by surface grinding) the following values ​​can be achieved:

Alternating bending stress (medium stress = 0): 620-680 MPa with a fracture probability of 5%

Tension threshold stress (minimum stress = 0): 520-580 MPa with a fracture probability of 5%

No values ​​can be guaranteed as the fatigue strength depends on various factors such as the ambient conditions and the edge properties.

Please ask if the material in stock is suitable for use as leaf valve steel or shock absorber steel.

In the case of very high loads or use of a corrosive environment, we recommend the stainless hardened special steel 1.4031Mo.

The highest application temperature should not exceed 200 ° C. Please note that the elastic modulus values ​​decrease with increasing temperature.

At higher temperatures up to about 350 ° C we recommend the use of stainless hardened steels, materials 1.4031Mo and 1.4034.

At even higher temperatures, alloy 718 must be used (a precipitation hardenable nickel alloy), which can be used up to approx. 650°C (precipitation hardenable nickel alloy), which can be used up to approx. 650°C.

Alloy designations

Material - Composition*

* for the exact composition can be documented in the form of a work certificate 3.1 (according to DIN 10 204) for each batch.

Physical information

Processing information 1095

Punching: The cutting gap should correspond to approximately 10% of the strip thickness. The corner radii should be at least 0.25 and the punch diameter at least twice the tape thickness. After punching, the parts can be heat-treated to relieve stress, at a maximum temperature of 250 ° C and for a duration of approx. 30 - 60 minutes.

For stamped parts, post-treatment by slide grinding is necessary to achieve good fatigue strength.

Instead of punching, the parts should be etched.

Laser cutting: Melting the steel at the cutting edge can lead to locally higher hardness and thus reduced toughness at the cutting edge. A cut with a water jet is recommended for critical parts.

Etching: The material is very easy to etch.

Bending: The strip structure is changed by the hardening process. This means that the direction of rolling when edging does not have to be observed. Bending radius: at least 10 times the strip thickness.

Springback: Since springback depends on various factors, bending tests should be carried out. An angle of 10 ° with a strip thickness of 0.20 mm and an angle of 20 ° with a strip thickness of 0.60 mm can be taken as a reference point.

Surface grinding: The material 1095can be magnetized and can therefore be clamped on magnetic chucks of grinding machines.

Welding: Due to the high carbon content of around 1%, material 1095 should not be welded.

Chemical resistance 1095

The unalloyed steels must be estimated from corrosion by an oil film. Tinning or galvanizing or painting these steels can withstand corrosion permanently.

Important NOTE

The technical information listed above or the information provided on the nature or use of the materials serve for description and are not a guarantee of properties. The information with which we want to advise you corresponds to our experience and that of our upstream suppliers. We cannot guarantee the results of processing and application. (03/2024)