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
|≤ %||≤ %||≤ %||≤ %||≤ %||%||%||%|
Mechanical properties of Staybrite 4435/4441WCQ+
|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|
Staybrite® 4435/4441WCQ+ must be annealed under the same conditions as standard grade 1.4435/1.4441WCQ. From
Temperatures of 1000-1050°C are recommended with fast cooling.
Staybrite® 4435/4441 WCQ+ is a material with a controlled and fine grain size, thanks to the remelting process.
(thickness 6 and thinner) and this allows for optimum cold forming, better corrosion resistance and a better polish.
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
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