DC-grade steels for efficient deep drawing
Optimal, high-precision formability
DC-grade steels are soft, easily formable products. Our DC grades are deep drawing steels that can meet the most variable requirements – from simple drawing operations to automated stamping and forming processes with complex end product geometries. DC-grade steels are used, for example, to construct telescopic rails in filing cabinets, which are expected to easily, silently and reliably extend and collapse while supporting weights of over 100 kg (220 lb) – and this for several years on end.
Minimal tolerances: from thickness tolerance to isotropy
Waelzholz DC grades are always the first choice when it comes to precisely manufactured parts. This is because of very tight tolerances within which we are able to produce our steelstrips. Due to these minimal thickness tolerance (≤ 1/3 of C tolerance acc. to EN 10140; see the table “Standard thickness tolerances” below), the uniformity of the formed product increases significantly. This is supported by a planar anisotropy (depending on the requirements) of <0.3 to enable an extremely uniform wall thickness (earing z < 1 percent) for rotationally symmetrical parts, or by a microstructure with an r bar > 1.6 orientation to achieve optimal deep drawing properties.
Another of our specializations is steel strip coating. Adding a phosphate layer to the strip surface makes complicated forming processes easier and minimizes tool wear.
Standard thickness tolerances
The industry standard EN 10140 specifies three thickness deviation classes: A, B and C. Class C is the class with the tightest tolerance specification. With its DC-grade steels, Waelzholz can achieve a 3rd of the C thickness tolerance. This significantly increases the uniformity of the formed product.
For the thickness tolerances for nominal width < 125 mm (< 4,921") please see the respective data sheet.