Copper-zinc alloy for a plumbing fitting and method for the production thereof

Inactive Publication Date: 2015-12-31
GROHE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent proposes using a specific amount of manganese to improve the strength and resistance to corrosion caused by weather and moisture. The upper limit of 0.1 wt% was set to avoid any problems with hard inclusions during melting. The technical effect of this proposes using a specific amount of manganese to improve the strength and resistance to corrosion caused by weather and moisture.

Problems solved by technology

In general, the material must be suitable for producing the components of a plumbing fitting, which may have, in part, a highly complex design.
Thus, when selecting a suitable material for components of a plumbing fitting, a large number of different objectives are present, which also conflict with each other to some extent.

Method used

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  • Copper-zinc alloy for a plumbing fitting and method for the production thereof
  • Copper-zinc alloy for a plumbing fitting and method for the production thereof

Examples

Experimental program
Comparison scheme
Effect test

exemplary embodiment 1

[0098]63.60 wt % Cu; 35.50 wt % Zn; 0.177 wt % Pb;

[0099]0.382 wt % Al; 0.128 wt % As; 0.187 wt % Fe;

[0100]0.017 wt % Sn; 0.001 wt % Mn;

[0101]0.008 wt % residual constituents

exemplary embodiment 2

[0102]63.29 wt % Cu; 35.57 wt % Zn; 0.168 wt % Pb;

[0103]0.459 wt % Al; 0.135 wt % As; 0.163 wt % Fe;

[0104]0.212 wt % Sn; 0.001 wt % Mn;

[0105]0.002 wt % residual constituents

exemplary embodiment 3

[0106]63.38 wt % Cu; 35.51 wt % Zn; 0.148 wt % Pb;

[0107]0.433 wt % Al; 0.125 wt % As; 0.164 wt % Fe;

[0108]0.239 wt % Sn; 0.001 wt % Mn;

[0109]The specified examples are characterized by an excellent dezincification resistance, a composition being simultaneously present, which may be easily recycled with other brass components. In particular, the copper-zinc alloy according to exemplary embodiment 2 is suitable to be further processed using the described method for producing a cast component. Due to the described heat treatment, properties of the cast component may be achieved, in which it was previously assumed that these properties were achievable only with the aid of increased lead contents above 0.2 wt %, particularly with regard to the machineability and the dezincification resistance properties of the cast component.

[0110]Comparison Materials:

[0111]CuZn21Si3P:

[0112]This alloy has a very high copper content (approximately 76 wt %) and is therefore very expensive. The equally high...

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Abstract

A copper-zinc alloy, in particular for providing components for a plumbing fitting. The alloy comprises (in % by weight): between 63.0 and 64.5% Cu, between 33.8 and 36.8% Zn, between 0.0 and 0.20% Pb, between 0.2 and 0.7% Al, between 0.04 and 0.14% As, between 0.0 and 0.3% Fe, between 0.0 and 0.3% Sn, between 0.0 and 0.1% Mn, and residual constituents in respective maximum quantities of 0.02%. A method for producing a cast component is provided that includes a copper-zinc alloy of this type. The copper-zinc alloy and the components produced therewith permit a particularly environmentally-friendly, cost-effective production of plumbing fittings.

Description

[0001]This nonprovisional application is a continuation of International Application No. PCT / EP2013 / 002907, filed Sep. 27, 2013, and which claims priority to German Patent Application No. 10 2013 003 817.0, filed Mar. 7, 2013, all of which is herein incorporated by reference.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to a copper-zinc alloy (or brass alloy) for a plumbing fitting as well as a method for the production thereof. In particular, relates to a cast alloy, with the aid of which water-conducting components and / or water-contacting components of a plumbing fixture may be produced.[0004]2. Description of the Background Art[0005]When producing components of a plumbing fitting, a wide range of requirements must be taken into account. In general, the material must be suitable for producing the components of a plumbing fitting, which may have, in part, a highly complex design. This applies to good castability or deformability, on t...

Claims

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Application Information

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IPC IPC(8): C22C9/04E03C1/02C22F1/08
CPCF16K51/00F16K17/00C22C9/04C22F1/08E03C1/04E03C1/021
InventorSCHROEDER, THOMASPETZOLDT, OLAF
OwnerGROHE