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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® 4435/4441WCQ+ 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® 4435/4441WCQ+ 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

C Si Mn P S Cr Mo Ni Fe
≤ % ≤ % ≤ % ≤ % ≤ % % % %  
0.03 0,8 2,0 0,03 0,005 17,0-19,0 2,5-3,0 13,0-15,0 bal

Mechanical properties of Staybrite 4435/4441 WCQ+

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. From

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.

(thickness 6 and thinner) and 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


Material Outlet by Hempel

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Jérôme Evrard
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