Staybrite 1.4435/1.4441WCQ+
Business Unit Manager Medical, Aerospace, Industry
Staybrite® 4435/4441WCQ+ is a state-of-the-art, fully austenitic, remelted stainless steel (ESR), CrNiMo type with about 18 % Cr, 14 % Ni, 2.7 % Mo.
Excellent polishing is one of the main requirements for the highly qualified materials used in the watch industry. This is why Staybrite® 4435/1.4441WCQ+ has been specially developed: A very high polishability and improved corrosion resistance, for the production of cases, bottoms, rings, circles, and watch straps.
The obtaining of a polishing of very high level and an incomparable shine, results from a specific chemical analysis and a very great mastery of the remelting process of the alloy. This allows also to guarantee a homogeneous and controlled structure (inclusions) as well as a very fine grain and the absence of ferrite.
Staybrite® 4435/1.4441WCQ+ was developed by Hempel Special Metals AG, Dübendorf/Zürich, Switzerland.
Chemical composition of 1.4435/1.4441WCQ+ - basic composition DIN 1.4435/1.4441 / X2CrNiMo18-14-3
| Element | % |
|---|---|
| C | 0,03 |
| Si | 0,8 |
| Mn | 2,0 |
| P | 0,03 |
| S | 0,005 |
| Cr | 17,0-19,0 |
| Mo | 2,5-3,5 |
| Ni | 13,0-15,0 |
| Fe | bal |
Mechanical properties of Staybrite 1.4435/4441WCQ+
| Property | Value |
|---|---|
| solution heat treated | typical values |
| Yield strength Rp 0,2 | > 190 N/mm2 |
| Tensile strength Rm | 490 - 690 N/mm2 |
| Elongation A | > 35 % |
| Hardness | > 150 HB |
Heat treatment
Staybrite® 4435/4441WCQ+ must be annealed under the same conditions as standard grade 1.4435/1.4441WCQ. Temperatures of 1000-1050°C are recommended with fast cooling.
Grain size
Staybrite® 4435/4441 WCQ+ is a material with a controlled and fine grain size, thanks to the remelting process. This allows for optimum cold forming, better corrosion resistance and a better polish.
Delivery program
- Cold-rolled sheets 2000 x 1000 mm, up to thickness 6.00 mm
- Hot-rolled sheets 2000 x 1000 mm, from 6.50 mm thickness upwards
- Strips sheared from sheet metal, or cut by laser or water jet
- Surface finish: Grinded on 2 sides, Ra ≤ 1
