As a lead-free cast bronze, the 1 kg CuSn12 ingot is the obvious bronze alloy, as it melts and casts well, and is corrosion-resistant and wear-resistant.<\/p>\n","link":"https:\/\/zinn-giesserei-goehler.com\/en\/produkt-kategorie\/alloys\/bronze-2\/","name":"Bronze","slug":"bronze-2","taxonomy":"product_cat","parent":298,"meta":{"_zgg_product_cat_long_description":"
| Alloy<\/th> | Delivery form<\/th> | Special feature<\/th><\/tr><\/thead>\n |
|---|---|---|
| CuSn12, lead-free<\/td> | 1 kg ingots<\/td> | common cast bronze, corrosion-resistant and wear-resistant<\/td><\/tr>\n |
| CuSn12-C (CC483K), up to 3% lead<\/td> | 250 g ingots, round bar<\/td> | like CuSn12, but easier to machine<\/td><\/tr>\n |
| CuSn8 (CW453K), lead-free<\/td> | 250 g ingots, round bar<\/td> | good hot and cold formability<\/td><\/tr>\n |
| Rg7, CuSn7Zn4Pb7-C (CC493K), up to 7% lead<\/td> | 250 g ingots<\/td> | bearing material with good emergency running properties<\/td><\/tr>\n |
| CuAl10Ni5Fe4 (CW307G)<\/td> | 250 g ingots, round bar<\/td> | aluminum bronze, corrosion-resistant even in seawater<\/td><\/tr>\n<\/tbody><\/table>\n The lead in the two lead-containing alloys does not hinder casting, but significantly improves machinability.<\/p>\n Rg7 and the tin bronzes generally have good emergency running properties. Good emergency running properties mean that a plain bearing made of Rg7 will not seize immediately if lubrication is briefly interrupted.<\/p> CuSn8 is easily deformable, but only moderately castable.<\/p>\n The recommended casting temperature for aluminum bronze is 1,150 to 1,200 \u00b0C, about 100 Kelvin above that of CuSn12 (1,050 to 1,100 \u00b0C). Your melting furnace should therefore reliably reach this temperature.<\/p>\n Ingots for casting or round bars as semi-finished products<\/h2>\nThe 250 g ingots can be ordered as 250 g, 500 g, or 1 kg. The surface is not polished and therefore appears somewhat matte, but the material is clean.<\/p>\n Round bars are semi-finished products for turning, milling, and further processing. CuSn8 is available in diameters from 3 to 15 mm in millimeter increments, as well as 20, 25, and 30 mm; aluminum bronze is available in 8, 10, 12, and 15 mm. The CuSn12-C bars are listed in the shop as Bronze Round Bars CuSn12 and, like all CuSn12-C articles, can only be ordered with a verified customer account. Since they are produced by continuous casting, their diameter varies between 15 and 17 mm, so there is no selection. Other dimensions are available upon request.<\/p>\n All lengths are given in millimeters, so a 100 mm bar is 10 cm long. To ensure safe handling, we deburr all bars before delivery.<\/p>\n The price for each variant is listed on the product page and depends on the alloy and weight for ingots, and on the alloy, diameter, and length for round bars. For bars over 1,000 mm, i.e., 1,500 and 2,000 mm, the base price includes a surcharge for the significantly higher transport costs for oversized lengths.<\/p>\n Re-alloying and Casting Bronze Alloy<\/h2>\nIf you need less than one kilogram of lead-free cast bronze, use CuSn8 in 250 g ingots and add 4 to 7 percent pure tin<\/a>. This creates a lead-free cast bronze with very good casting properties, similar to CuSn12. If you are preparing your alloy from scratch, you will find the base metal under pure copper<\/a>.<\/p>\n Crucibles, coated tools, and molds must be completely dry before casting, as molten metal will splash if it comes into contact with moisture. In foundries, safety glasses, heat-insulating gloves, and flame-retardant protective clothing are part of the equipment. For casting in your own workshop, this equipment provides good guidance.<\/p>\n |