410 Martensitic Stainless Steel Bar
410 due to its excellent hardenability is capable of being through hardened to over Rc40 depending upon carbon content and section size. Small sections can be air cooled and larger sections oil quenched for maximum through hardness.Pre hardened and tempered 410 will also respond readily to nitriding achieving a typical surface hardness of over Rc65. The nitriding process however reduces the corrosion resistance and is therefore not generally recommended except for critical applications where the benefit outweighs all other considerations.
Used for parts requiring a combination of good strength and toughness, plus reasonable corrosion resistance. Typical applications are: Bolts, Bushings, Fasteners, Gas Turbine Parts, Mine Equipment, Pump Parts, Petrochemical Equipment, Steam Turbine Parts, Studs, Valve Parts etc.
Material magnetic in all conditions.
|Colour Code||Stocked Sizes|
|Min. %||Max %|
|*Nickel additional option|
|Tensile Strength Mpa||Min||700|
|0.2% Yield Strength Mpa||Min||495|
|Impact Izod J||Min||34|
|Tensile Strength Mpa||760|
|Yield Strength Mpa||595|
|Impact Charpy J J||53||90|
|Tensile Strengt Mpa||1350||1295||1300||690||830||730|
|0.2% Yield Strength Mpa||1095||1070||1020||915||725||630|
|Elongation in 50mm %||17||17||18||19||20||21|
|Impact Charpy J||76||66||*38||*33||52||95|
|Tensile Strength Mpa||1200||540||350||220|
|Yield Strength Mpa||965||510||320||190|
|Elongation in 50mm %||15||24||30||39|
|Room Temperature Hardness After Test||HB||390||285||240||220|
It is most important that oxygen is always allowed to circulate freely on all stainless steel surfaces to ensure that a chrome oxide film is always present to protect it. If this is not the case, rusting will occur as with other types of non stainless steels.For optimum corrosion resistance surfaces must be free of scale and foreign particles.|
Finished parts should be passivated.
Do not forge below 900oCFinished forgings should be cooled slowly in ashes or warm dry lime etc. until hand warm and annealed immediately.
Note: For best machinability use the low end of the range.
Parts can therefore be machined to near final size, leaving a grinding tolerance only. Always ensure that the tempering temperature employed during the initial heat treatment was higher than the nitriding temperature otherwise the core strength will be affected.
A double tempering treatment as follows is recommended for optimum toughness.Heat to 650oC - 680oC. *Soak as required. Cool in air|
Re-heat to 620oC - 660oC. *Soak as required. Cool in air
410 can of course be tempered at much lower temperatures, producing much higher tensile strengths, but with subsequent lower impact properties.
NB. Tempering however within the range 400oC - 580oC should be avoided due to temper brittleness, resulting in a considerable reduction in impact properties and loss of corrosion resistance.
*Heating temperatures, rate of heating, cooling and soaking times will vary due to factors such as work piece size/shape, also furnace type employed, quenching medium and work piece transfer facilities etc.
Please consult your heat treater for best results.
The following welding procedure and post-weld heat treatment may be taken as a guide only.
Pre-heat at 200oC - 300oC and maintain a high heat input during welding. On completion of welding cool slowly as possible until hand warm and as required:Post-weld sub-critical anneal at 630oC - 680oC or full anneal and harden and temper as required.
*Please consult your welding consumables supplier.
Interlloy believes the information provided is accurate and reliable. However no warranty of accuracy, completeness or reliability is given, nor will any responsibility be taken for errors or omissions.