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Types of Steel


Steel can be generally classified into 2 types, namely:
A.  Carbon steel (Carbon steel)
B.  Steel alloys (Alloy steel)

A. Carbon steel (carbon steel)
Carbon steel can be consisted of:
1.  Low carbon steel (low carbon steel)
Machine, machinery, and mild steel (0.05% – 0.30% C) Its malleable and easy to use is the engine:
• 0.05% – 0.20% C: automobile bodies, buildings, pipes, chains, rivets, screws, nails.
• 0.20% – 0.30% C: gears, shafts, bolts, forgings, bridges, buildings
2.  Medium-carbon steel (medium carbon steel)
• The strength is higher than the low carbon steel its hard to be bent, welded, cut.
Usage:
• 0.30% – 0.40% C: connecting rods, crank pins, axles.
• 0.40% – 0.50% C: car axles, crankshafts, rails, boilers, auger bits, screwdrivers.
• 0.50% – 0.60% C: Hammers and sledges
• Carbon steel (high carbon steel) tool steel
Its hard to be bent, welded and cut. Content of 0.60% – 1.50% C
Usage:
• screw drivers, Blacksmiths hummers, tables knives, screws, Hammers, vise jaws, knives, drill tools for turning brass and wood, reamers, tools for turning hard metals, Saws for cutting steel wire   drawing dies, fine cutters
B.  Alloy steel (alloy steel)
Purpose of the addition of elements, namely:
• To increase the mechanical properties of steel (hardness, plasticity, tensile strength, etc.)
• To increase the mechanical properties at low temperatures
• To increase resistance to chemical reaction (oxidation and reduction)
• To make the special properties
Alloy steels are classified according to their carbon content is divided into:
• Low alloy steel, if the element alloys ≤ 2.5%
• Medium alloy steel, if the element alloys from 2.5 to 10%
• High alloy steel, if the element alloys> 10%
Alloy steel is also divided into two groups, namely a special alloy steel (special steel alloy) & high speed steel :
• Special alloy steel (special steel alloy)
This type of steel to contain one or more metals such as nickel, chromium, manganese, molybdenum, tungsten and vanadium. By adding the metal into steel alloy steel then it will change the mechanical properties and chemical properties such as being harder, stronger and resilient when compared to carbon steel (carbon steel).
• High Speed Steel (HSS) Self Hardening Steel
Carbon content: 0.70% – 1.50%. Making use of cutting tools such as drills, reamers, countersinks, lathe tool bits and milling cutters. Referred to as High Speed Steel cutting tools are made with materials that can be operated two times faster than carbon steel. While the price of HSS magnitude of two to four times than carbon steel
Other types:
Steels with special physical and chemical properties:
• salt-resistant steel
• heat-resistant steel
• Steel without scales (non-scaling steel)
• Electric steel
• Magnetic steel
• Non-magnetic steel
• wear resistant steel (wear resisting steel)
• Stainless steel / corrosion
By combining the two classifications of steel according to the utility and chemical composition of the obtained five steel groups, namely:
• Carbon steel construction
• Carbon steel tools
• Alloy Steel construction
• Alloy tool steel (alloyed tool steel)
• Alloy steel  of high onstruction

sources: from various references

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Discussion

2 thoughts on “Types of Steel

  1. Mild steelis so-called because it contains only a low percentage of carbon. Mild steel is very versatile and is used in the manufacture of a wide variety of items, including sheet metal roofs, automobile frames, construction panels and large storage containers.

    Posted by mild steel plate | November 9, 2012, 10:46 am
  2. Thank you for reminding and giving advice, hope may be useful for all,

    Posted by wwidianto | December 9, 2012, 2:54 pm

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