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

a technology of copper-zinc alloy and plumbing fitting, which is applied in the direction of safety valves, functional valve types, domestic plumbing, etc., can solve the problem of high complexity of design

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

AI Technical Summary

Benefits of technology

The invention proposes using a manganese content to improve the strength and resistance to corrosion caused by weather and moisture. The upper limit of 0.02% by weight is set to avoid any problems with hard inclusions that may occur during melting. This limit is also based on the amount of manganese that has been found to be necessary for optimal performance.

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.
It may be inferred therefrom that, 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

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exemplary embodiment 1

[0049]

[0050]63.60 wt % Cu; 35.50 wt % Zn; 0.177 wt % Pb;

[0051]0.382 wt % Al; 0.128 wt % As; 0.187 wt % Fe;

[0052]0.017 wt % Sn; 0.001 wt % Mn; 0.008 wt % residual constituents

[0053]The specified example is characterized by an excellent dezincification resistance, a composition being simultaneously present, which may be easily recycled with other brass components.

[0054]Comparison Materials:

[0055]CuZn21Si3P:

[0056]This alloy has a very high copper content (approximately 76 wt %) and is therefore very expensive. The equally high silicon content of approximately 4 wt % results in enormous problems when mixed with conventional alloys; in particular, the danger of inclusion-comprising silicon oxide arises. The recyclable material must therefore be strictly separated, and only input materials of one type may be used. In practice, a foundry must used either separate furnaces or crucible melting furnaces which have removable inserts for mixtures of CuZn21Si3P and other materials.

[0057]MS 63

[00...

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Abstract

A copper-zinc alloy, in particular for providing components for a plumbing fitting. The alloy includes (in % by weight): between 63.5 and 63.8% Cu, between 35.2 and 35.6 Zn, between 0.17 ans 0.20% Pb, between 0.32 and 0.4% Al, between 0.11 and 0.13% As, between 0.16 and 0.2% Fe, between 0.0 and 0.2% Sn, between 0.0 and 0.2% 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 / 001976, filed Jul. 5, 2013, and which claims priority to German Patent Application No. 10 2013 003 817.0 filed on Mar. 7, 2013, both of which are 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, it concerns 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, ...

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
Inventor SCHROEDER, THOMASPETZOLDT, OLAF
Owner GROHE