PRODUCTS
The advantages of permanent mould casting compared to classic sand casting are, in particular, the high cooling rates. These give the castings a relatively fine-grained and dense structure that is able to withstand significantly higher mechanical loads.
Moreover, gravity die casting stands out by relatively thin-walled and excellent castability with high measurement accuracy in the range of one tenth, which allows us to implement even highly complex housing structures.
BRASS DIE CASTING
Gravity die castings have always been manufactured from brass.
We too have been working with brass ever since the company was founded in 1954. As a consequence, we can fall back on extensive expertise and experience with regard to this material.
Copper-zinc cast alloys
| Abbreviations | Strength characteristics of test bars | |||||
|---|---|---|---|---|---|---|
| 0.2-limit N/mm2 min | Tensile strength N/mm2 min | Elongation at break % min | Brinell hardness HB 10/1000 min | Density kg/dm3 | Areas of application and product characteristics | |
| GK-CuZn37Pb also available as a fine-grained and polishable alloy | 90 | 280 | 20 | 70 | 8,5 | Valves for fresh water and/or drinking and process water, fittings and construction parts. Ideal for machining. |
| GK-CuZn35Pb 2AI-B dezincification resistant alloy, also available in a fine-grained version | 120 | 280 | 10 | 70 | 8,5 | Hot water valves and fittings, also for moderately aggressive water. |
| GK-CuZn38AI GK-CuZn37AI1 GK-CuZn35AI1 GK-CuZn34AI2 |
130 170 200 260 |
380 450 475 600 |
20 25 18 14 |
75 105 110 150 |
8,5 8,5 8,6 8,6 |
Convoluted construction parts for all industrial sectors. Good corrosion resistance. |
| GK-CuZn15Si4 | 300 | 500 | 8 | 125 | 8,6 | High-strength construction alloy with good castability. Resistant to seawater. |
ALUMINIUM DIE CASTING
Aluminium challenges the process of gravity die casting and requires knowledge of the material. Compared to other metal parts, aluminium parts are light but nevertheless able to achieve high strength. Our aluminium castings are used in a wide range of industries.
ALUMINIUM CAST ALLOYS
| Abbreviations | Strength characteristics of test bars | |||||
|---|---|---|---|---|---|---|
| 0.2-limit N/mm2 min | Tensile strength N/mm2 min | Elongation at break % min | Brinell hardness HB 5/250 min | Density kg/dm3 | Areas of application and product characteristics | |
| GK-CuZn37Pb | 120-180 | 180-240 | 1-3 | 75-110 | 2,75 | Machine and motor parts for the automotive industry, electrical engineering, mining etc. |
| GK-AISi12(Cu) | 90-120 | 180-240 | 2-4 | 55-75 | 2,65 | Machine parts, parts subjected to impact and vibration stress, thin-walled housings. |
| GK-AISi12 | 80-11 | 170-230 | 6-12 | 50-65 | 2,65 | Difficult and heavily stressed parts. |
| GK-ALSI10Mg(Cu) GK-ALSI10Mg(Cu) warmausgehärtet |
100-140 210-280 |
200-260 240-320 |
1-3 1-3 |
65-85 85-115 |
2,65 | Difficult and heavily stressed parts. |
| GK-ALSI10Mg GK-ALSI19Mg warmausgehärtet |
90-120 210-280 |
180-240 240-320 |
2-6 1-4 |
60-80 85-115 |
2,65 | Difficult and heavily stressed parts. |
| GK-ALSI10Mg(Cu) GK-ALSI10Mg(Cu) warmausgehärtet |
100-140 210-280 |
200-260 240-320 |
1-3 1-3 |
65-85 85-115 |
2,65 | Difficult and heavily stressed parts. |
| GK-ALSI5Mg | 120-160 | 160-200 | 1,5-4 | 60-75 | 2,7 | Parts for the food and chemical industries, fire protection. |
| GK-AlMg3 | 70-110 | 150-200 | 5-12 | 50-60 | 2,7 | Decorative home furnishings. |
| GK-ALZn10Si8Mg | 200-230 | 280-320 | 3-6 | 105-120 | High-strength castings for mechanical engineering and apparatus construction, self-ageing. |
CUPHIN DIE CASTING
Through intense development work, we have succeeded in casting the new material CUPHIN for virtually all imaginable moulds and applications. This makes us one of the few German companies that, having dealt in considerable detail with the material, are able to meet the new processing requirements as early as today.
CUPHIN DIE CASTING
| Abbreviations | CuZn21Si3PB EN-Nr.: CW724R |
|||||
|---|---|---|---|---|---|---|
| Composition (per cent by weight) | Certification according to DIN 50930 - 6 | Certification according to US laws | Products and relevant standards | Mechanical properties and strength | Physical properties | |
| Cu 75-77 Zn Rest SI 2,7 - 3,5 P 0,02- 0,10 Inevitable accompanying elements Pb ≤ 0,1 Mn ≤ 0,05 Al ≤ 0,05 Ni ≤ 0,2 Fe ≤ 0,3 Sn ≤ 0,3 Further impurities according to the hygienic list ( ≤ 0,02%) |
The alloy can be used for applications in the drinking water sector, e.g. for fittings including tap extensions (lead ≤ 3.5%), product categories B and C. Hygienic list: included. |
S3874 Reduction of Lead in Drinking Water Act. The alloy can be used for applications in the drinking water sector. |
EN 1982, ingots | Reference values for standard production (gravity die casting) Rm-500 N/mm2 Rp02-200 N/mm2 A5-22% HB-135 |
Density g/cm³ 8.3 Coefficient of linear expansion: 20-200°C 10-6/K 20 Electrical conductivity: m/ (Q mm²) 5.3 Modulus of elasticity: GPa 106 |