Through hardening is a process used to improve the hardness and tensile strength of steel. The process involves heat treatment followed by a rapid quench technique to alter the structure of the steel, thereby increasing its strength. In contrast to case hardening, which strengthens only the outer layer of the material, through hardened steel is strengthened all the way through from the surface to the core, hence the term “through hardening”.
Typical materials used for through hardening include…
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High Peak Steels stock an extensive range of through hardening steel, ensuring we can fulfil orders on short lead times and maintain our enviable reputation for over 95% of orders delivered in full and on time.
Through hardening steel grades listed are available in either bright or black bar in square, round and flat formats.
Typically, through hardening steel is a 3 step process…
Due to its robust core, through hardened steel is suitable for components that require good wear resistance and durability. These include roller bearing components, axles and camshafts for the automotive industry.
Given case hardening steel offers increased surface strength and resistance to wear and corrosion, without the increased brittleness of through hardened steel, you might wonder why not just employ the case hardening process?
One of the main advantages of through hardening is that it produces a more uniform hardness throughout the entire component. Because the cooling process is much faster than in case hardening steel, the formation of different microstructures within the steel is avoided. Also, through hardening is less likely to cause warping or distortion in the steel.
Both through hardening steel and case hardening steel processes produce high-quality steel components that meet specific performance requirements, while staying within budget constraints. Which one will work best for your application depends on factors like cost considerations, required strength and toughness levels, and expected service life.
080M40 | EN8 is a medium carbon steel which is used in applications where better properties than mild steel are required, at a lower cost than an alloy, making this an excellent alternative to alloy.
080A42 | EN8 steel is an unalloyed carbon steel with reasonable tensile strength. Heat treating this engineering steel provides a good surface hardness.
212A42 | EN8DM is a bright drawn medium carbon semi-free cutting steel, suitable for repetition machining, good for induction hardening.
070M55 | EN9 steel is a medium carbon steel with good tensile strength. It possesses good wear resistance, but poor weldability.
150M19 | EN14A is a low carbon manganese steel which is weldable and has good impact resistance. EN14A machines like mild steel.
709M40T | EN19 is a high quality alloy steel with tensile strength, good ductility and shock resistance, making it ideal for load bearing, such as engine gear boxes.
817M40T | EN24 is a very high strength steel alloy which is supplied hardened and tempered ideal for gears. The grade is a nickel chromium molybdenum combination.
826M40 | EN26 in round bar hot rolled and heat treated to ‘W’ condition. It is suitable for applications which require higher tensile and yield strength than 817M40 or 826M31 specifications.
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