IMPORTANT PROPERTIES FOR SPOKE WIRE
To get best possible properties for spoke wire, it is very important to fulfill following parameters:
- Tight chemistry which will ensure an excellent product consistency
- Mechanical properties and deformation hardening
- Corrosion properties
- Surface conditions
- Dimension and tolerance
SPOKE WIRE STEEL GRADES
After decades of close cooperation with customers, our VECTOR spoke wire has been developed to fulfill the high requirements regarding spoke wire.
All of our steel grades have tight chemistries, which will ensure an excellent product consistency delivery after delivery. We supply two types of spoke wire:
- VECTOR A Our Austenitic spoke wire Collection
- VECTOR D Our Duplex spoke wire Collection
We can control mechanical properties and surface conditions by chosing a specific grade and how we process the wire in production. Following mechanical properties are important for spoke wire:
High tensile strength is needed. We supply in customized levels from 900-1300 N/mm2.
- Max 40 N/mm2 variation within a coil
- Max 100 N/mm2 variation delivery to delivery
This is important in order to be able to reduce the spoke diameter in the middle section which will save weight, increase strength, flexibility and fatigue resistance. Straightening, bending and threading properties are also important basic requirements in order to make any type of spoke wire.
By testing and calculating CWH and Md30 we can control elongation in relation to tensile strength.
Since spoke wire is in contact with water, corrosion resistance is important.
PRE (Pitting Resistance Equivalent) is a factor comparing properties of different chemistries with regards to pitting and crevice corrosion in corrosive environments. A higher value means better resistance. The materials PRE-value is shown in our steel grade tables. Surface smoothness is also an important factor to prevent corrosion.
Spoke wire is often used in environments where there are high demands with regards to aesthetical properties. It is therefore important that the surface is bright and free from defects. We have developed our own various bright drawing methods which makes it possible for us to offer standard to high demanding Surfaces:
- FAGERSTA PCD
- FAGERSTA Royal
DIMENSION AND TOLERANCE
1.50 – 5.00 mm (.059” – .394”)
+0/-0.02 mm (+0/-.001”)
Max 50% of the total tolerance range