How to tell a piece of iron wire from a piece of steel. The same thickness of Iron wire and steel wire look the same from the outside, but their properties are very different and their uses are not the same.
Iron wire is easy to bend, has no elasticity and is also relatively soft and can be easily broken with pliers. Steel wire, however, is very difficult to bend and will also spring back after bending, is relatively hard and difficult to snap off with ordinary steel pliers.
Due to the hardness of the wire, using pliers to clip the wire will often be a hard clinch, either not clinching or damaging the jaws of the pliers, leaving small nicks in the blade. We can use wire to bind things, but if we use steel wire by mistake, we will get half the result. Conversely, you can't make a spring out of wire. This shows that wire and steel have their own strengths and that it is important to know how to use them.
In life, wire is used in places such as wire mesh, telephone wires, paper clips, wire for binding, and iron gauze.
Iron Wire is used in various places: springs, wire brushes, hairpins, pins, piano strings, central wires for cables (to increase the strength of aluminium cables), spokes for bicycles, wire gates, wire sieves, weight-bearing wire rope
What is the fundamental difference between Iron wire and steel wire?
They are both mainly composed of iron, the difference lies in their different carbon content. Steel and iron are classified by their carbon content. Those with less than 0.03% carbon are called cooked iron, those with 0.03% - 1.7% carbon are called steel and those with higher carbon are pig iron. Pig iron is obtained from the blast furnace where the iron is made. Pig iron is brittle and hard, and cannot be drawn into wire. Pig iron is oxidised and decarburised, and can be turned into steel and cooked iron, which is soft iron and is rarely used nowadays. Steel has toughness, but also has good strength, fork easy processing (turning, planing, milling, grinding, etc.), is the use of more metal materials. Steel also varies in softness and hardness with the amount of carbon it contains. Low carbon content of steel is called low carbon steel, is a relatively soft steel, now on the market is actually sold by the low carbon steel wire system Chi. The steel wire used to make springs is made of medium carbon steel or alloy steel, while high carbon steel is mainly used to make tools.
1. Different production procedures
(1) Iron wire: hot metal billets rolled into 5 mm thick steel, drawn into different diameters of steel wire in the drawing device, the diameter of the aperture of the drawing disc gradually decreases, and through the cooling, annealing, coating and other processes to process a variety of specifications of the wire.
(2) Steel wire: the main processes of production are the selection of raw materials, removal of iron oxide, drying, coating treatment, heat treatment, wire drawing and coating treatment.
2. Different classification
(1) Iron wire 0.50mm diameter 25# iron wire, 0.55mm diameter 24# iron wire, 0.60mm diameter 23# iron wire and 0.70mm diameter 22# iron wire, etc.
(2) steel wire by cross-sectional shape, mainly round, square, rectangular, triangular, oval, flat, trapezoidal, Z-shaped, etc..
(2) By size, there are extra-fine <0.1 mm, finer 0.1 to 0.5 mm, fine 0.5 to 1.5 mm, medium 1.5 to 3.0 mm, coarse 3.0 to 6.0 mm, coarser 6.0 to 8.0 mm, extra coarse >8.0 mm.
Classified by strength, low strength <390 MPa, lower strength 390~785 MPa, ordinary strength 785~1225 MPa, higher strength 1225~1960 MPa, high strength 1960~3135 MPa, extra high strength >3135 MPa.
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