Bronze is an alloy material as the main constituent of copper. Specific properties are obtained by varied alloying of the main copper component. Below are the bronze alloys that are processed by Femco Special Parts.

Cast bronze 7 (RG7) is our most processed alloy and is characterized by its excellent work properties. Partly because of this, this alloy is perfectly suitable as a plain bearing product.
Cast bronze 12 (CuSn12) is wear-resistant and corrosion and seawater resistant due to the adapted copper alloy. The running properties are more durable than RG7.
Aluminum bronze (CuAL10Ni) is a hard and wear-resistant bronze alloy. The material is therefore not only seawater resistant but also resistant to acids.


Aluminum is light (only a third of the weight of steel or bronze) and with 4% copper, 1% magnesium, 1% manganese and 0.5% silicon, it is equally durable and resistant to corrosion. Aluminum does corrode when it comes into contact with oxygen, but the oxide skin that is formed is smooth and closed, so that the underlying material does not corrode further. Due to the technical or decorative anodizing of the surface, the material is also durable when it comes into contact with oxygen.

The most processed and technically treatable anodizing quality is AW-2011 T6 round pressed.


Brass is an alloy of copper with more than 15% zinc. It is relatively strong, has excellent corrosion resistance, is visually attractive and is easy to process. Additional elements can be added to improve the machinability of brass. The most commonly used brass alloy is the MS58. This alloy is very suitable for post-treatment such as nickel plating, chrome plating and silver plating of your end products.

Stainless Steel

Stainless is an alloy of iron, chrome, nickel and carbon. The name stainless or stainless does not mean that these materials cannot rust, because stainless steel can rust. The oxide skin of a stainless material seals the underlying material well, so that in some cases no further rusting will occur or this rusting will be delayed. In practice, there are two reasons why stainless steel can still rust, in the presence of chlorides and in the contamination of the material by 'ordinary' steel that does rust, which can be avoided by treating the material with all possible contaminants being removed. This treatment consists of pickling and passivating the final products. These anti-rust surface treatments provide the metal with a new passive layer, while the pickling dissolves a thin layer of the metal surface and existing oxide skin, including impurities. Because iron dissolves faster than chromium during pickling, the oxide skin is effectively enriched for chromium. Passivation is a treatment in a bath with nitric acid, in which the oxide skin is restored and the passive state returns. This treatment gives the underlying metal back its original corrosion protection. The most common stainless steel alloys processed by Femco Special Parts are:

1.4016 – X6Cr17 – 430 – S43000
1.4305 – X8CrNi18-9 – 303 – S30300
1.4306 – X2CrNi19-11 – 304L – S30403
1.4301 – X5CrNi18-10 – 304 – S30400
1.4404 – X2CrNiMo17-12-2 – 316L – S31603
1.4401 – X5CrNiMo17-12-2 – 316 – S31600

Construction Steel

Femco processes 2 types of steel, unalloyed steel and low-alloy steel. Unalloyed steel contains up to 1.5% of alloying elements (excluding carbon (C)). Commonly used alloying elements include manganese (Mn) and silicon (Si). Like carbon, manganese and silicon are used to increase strength and hardness. Unalloyed steel is most commonly used in machining. This is because it is relatively inexpensive and very workable. Low-alloy steel contains between 1.5 and 5% alloy elements (excluding carbon (C). As with unalloyed steel, manganese and silicon are common alloy elements (Si = 0.7% , Mn = 1.6%) But also the additions of chromium (Cr), vanadium (V), nickel (Ni) and molybdenum (Mo) are common alloying elements within this group. Below are the most common steel alloys processed by Femco Special Parts:

11SMnPb30+C(SH)/9SMnPb28 C45+C(SH)
C45k passing
42CrMoS4+QT+SH h9

In terms of surface treatments for processing your semi-finished product, there are countless possibilities for which the most commonly used are below:

Zinc plating / passivation
Chemical nickel plating
Chemical blackening
Hardening and tempering (Hardening processes are used to impart specific mechanical properties to a component, making them suitable for their applications.)


Plastic is also suitable for fine mechanical turning and milling work. Specifically the harder plastics such as POM-C and PVC, but we do not turn our hand for many other materials. For short turning work, our INDEX C100 is particularly suitable for serial plastic productions. The most common thermoplastics processed by Femco Special Parts:

Polyoxymethylene (POM-Delrin)
Polyvinyl Chloride (PVC)
Polyetheen (HDPE)
Polytetrafluoroethylene (PTFE)


Femco Special Parts has been awarded for its consistant quality and engineering

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