EN 10139 USt 3: Cold‑Rolled, Skin‑Passed Steel (K32) – Ideal for Precision Tooling
The soft non-alloy steel USt 3 is suited for cold forming and is offered in different conditions (K to K60) with different strength and depth indications. The steel is applicated in the plant and tool engineering. Free from stretcher lines for 4 weeks is garuanteed in the LG and K32 condition. No stretcher lines occur in the conditions K40 to K60. The steel is weldable, in the conditions K32 to K40 the strength can be decreased post welding.
Properties
General
| Property | Temperature | Value | Comment |
|---|---|---|---|
Density | 20.0 °C | 7.8 - 7.9 g/cm³ | Typical for Low Carbon Steel |
Mechanical
| Property | Temperature | Value | Comment |
|---|---|---|---|
Elastic modulus | 20.0 °C | 200 - 215 GPa | Typical for Low Carbon Steel |
Elongation | 20.0 °C | 26 % | |
Elongation A80 | 20.0 °C | 22 % | |
Poisson's ratio | 20.0 °C | 0.29 [-] | Typical for Low Carbon Steel |
Tensile strength | 20.0 °C | 290 - 390 MPa | |
Yield strength | 20.0 °C | 210 - 355 MPa |
Thermal
| Property | Temperature | Value | Comment |
|---|---|---|---|
Coefficient of thermal expansion | 20.0 °C | 1.32E-5 - 1.38E-5 1/K | Typical for Low Carbon Steel |
Melting point | 1480 - 1526 °C | Typical for Low Carbon Steel |
Magnetic
| Property | Value | Comment |
|---|---|---|
Curie temperature | 770 °C | Typical for Low Carbon Steel |
Chemical properties
| Property | Value |
|---|---|
Carbon | 0.08 % |
Nitrogen | 7E-3 % |
Metal
- EN 10139 Grade RRSt 3 – Cold‑Rolled, Skin‑Passed Steel for High‑Performance Tooling
- EN 10139 RRSt 3 K32 Grade – Premium Cold Rolled, Skin-Passed Non‑Alloy Steel for Precision Tooling
- EN 10139 Grade St 2 Cold Rolled Steel – Skin-Passed, High Strength & Weldable
- EN 10139 St. 2 Cold‑Rolled, Skin‑Passed Steel (K32) – Superior Strength & Weldability
- EN 10139 Grade St 4 Cold-Rolled, Skin-Passed Steel (K32) – High Strength & Formability
- EN 10139 Grade USt 3: Cold‑Rolled, Skin‑Passed Steel for High‑Performance Applications
- EN 10139 DC05 Cold Rolled Low‑Carbon Steel – Skin Pass Grade
- EN 10139 Grade DC01 Cold-Rolled Steel – Skin-Passed, Ideal for Precision Cold Forming
- EN 10139 Grade DC03: Cold Rolled, Skin-Passed Low-Carbon Steel Strip
- EN 10139 Grade DC04 Cold-Rolled Steel – High-Quality, Skin-Passed, Ideal for Cold Forming