Type 440C Stainless Steel is commonly used in antifriction bearings, in valves and in several other applications where hardness and corrosion opposition are required. This material is more resistant to wear and abrasion than chromium steel. This is a high alloy, fine grain, through hardening, Martensitic metal that is stainless. Because of its high hardness and fine grain structure, it may be finished to a fine quality that is dimensional.
Hardness
This material shall harden to 58 rockwell "C" (58 HRC) minimum. The hardness is measured on parallel ground flats or the reading taken at first glance that is spherical corrected for the curve. The HRC scale uses 150 kilogram load ( approximately 330 lb. ) applied to a diamond conical indenter.
Density
with this material is .277 pounds per cubic inch ( 7.67 g/cm^3).
Magnetic
This material is strongly attracted by a field that is magnetic.
Machinability
This material can be ground, honed, and lapped using old-fashioned abrasives in the hardened condition. It can be shaped and drilled using electric discharge machining or cavitation that is ultrasonic. This material can be machined using normal techniques within the annealed condition.
Weldability
Since this material has 1% carbon it is difficult to obtain a weld that is good and it might be welded with difficulty. Its possible to soft solder by having a tin that is high using an acid flux. It can be silver soldered or brazed, nevertheless the heat shall cause distortion associated with ball and a loss that is considerable of. The ball are connected with an adhesive such as epoxy for light load applications. When bonding that is adhesive used, an area on the ball should be roughed up by etching or blasting that is abrasive.
Chemical Analysis
Carbon 0.86-1.2%
Molybdenum 1.0% Max
Chromium 16.0-18.0%
Manganese 1.0% Max
Silicon 1.0% Max
Sulfur 0.03% Max
Phosphorus 0.04% Max
Ferrite Balance
