S55C is a medium carbon steel grade commonly supplied in the as rolled condition. It can be flame or induction hardened to produce a high surface hardness with excellent wear resistance for a carbon steel grade.
Sizes we offer in S55C steel bars are
- Rounds – 20mm to 80mm
- Bright Bars – 18mm to 63.5mm
- Flats – 50 mm x 8mm to 150mm x 25mm
- Squares – 22mm to 75mm
- RCS – 55mm, 63mm, 75mm
- Hexagons – 23.5mm to 38mm
Typical Chemical Properties
- Carbon 0.52-0.58%
- Manganese 0.60-0.90%
- Silicon 0.15-0.35%
- Phosphorous 0.03% max
- Sulphur 0.03% max
S55C is used commonly for many general engineering applications. Typical applications include, shafts, axes, knives, bushes, crankshafts, screws, sickles, wood working drills and hammers.
Preheat the component carefully, then raise the temperature to 1100oC for forging. Do not forge below 850oC. After forging cool slowly, preferably in a furnace.
Heat the steel slowly to 680-710oC, soak well. Cool slowly in the furnace.
Heat slowly to 820-840oC and allow it to be heated through. Quench in oil, brine or water.
Temper the S55C steel component immediately after quenching whilst still hand warm. Re-heat to the tempering temperature then soak for one hour per 25 millimetre of total thickness (2 hours minimum) Cool in air. For most applications tempering of S55C will be between 550-660oC.
We recommend you contact your welding consumables supplier who should provide you full assistance and information on welding S55C steel.
Heat treatment temperatures, including rate of heating, cooling and soaking times will vary due to factors such as the shape and size of each S55C steel component. Other considerations during the heat treatment process include the type of furnace, quenching medium and work piece transfer facilities. Please consult your heat treatment provider for full guidance on heat treatment of S55C carbon steel.
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