Free sample 4140 alloy steel, steel aisi 4140, aisi 4140 shaft

Free sample 4140 alloy steel, steel aisi 4140, aisi 4140 shaft

The History of YAOTENG STEEL

 •1995.10 Established tool steel Plus workshops,beginning make the

mould steel cutting process

•2001.7 Changed to limited liability company, have 8 set
semi-automatic Bandsaw Cutting machinery and 3 set planing machine.

•2004.6 All Bandsaw Cutting machinery update to CNC Machinery,1 set
large precision grinding machine and 2 set small grinding is was
introduced and purchase a set Gantry Milling

•2009.5 Establish cooperation with Changcheng Special Steel Co.,Ltd, FUSHUN special steel and BaoSteel. as the specified distributor for special steel.

•2010.2 Start International trade

•2012 Through Alibaba certified high quality suppliers

•2013 and 2014  finished the company new Shares system ,  Customers in more than 40 countries around the world

AISI 4140 steel  -ASTM A681-1999

Supply of 4140 steel material

		Plate	Flat	Diameter

Applications of 4140 steel  material

Forging of 4140 steel material

Preheat the steel carefully, then raise the temperature to 1150-1200°C for forging. Do not forge below 850°C.

When parts are heavily machined, ground or otherwise subject to cold work, stress relieving will be beneficial prior to hardening. 

Hardening of 4140 steel material

AISI 4140 steel is usually supplied ready heat treated to 18-22HRC. If further heat treatment is required annealed AISI 4140 should be heated slowly to 840-875°C and after adequate soaking at this temperature quench in oil. Temper as soon as the tools reach room temperature.

Tempering of 4140 steel material

Heat the AISI 4140 carefully to a suitable temperature selected by reference to a tempering chart or table (usually between 550-700°C, soak at the temperature for 2 hours per 25mm of ruling section, then allow to cool in air. Tempering between 250-375°C is not advised as tempering within this range will seriously reduce the impact value.

Welding  of 4140 steel material

   Normal we don't advice Welding the 4140 steel material. We recommend you contact your welding consumables supplier who should provide you full assistance and information on welding 4140 steel.

Heat treatment of 4140 steel material

Heat treatment temperatures, including rate of heating, cooling and soaking times will vary due to factors such as the shape and size of each AISI 4140 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 alloy steel.

Final Grinding of 4140 steel material

Select the correct grade of wheel in consultation with the grinding wheel manufacturer. Ensure the grinding wheel is in good condition by means of a suitable dressing tool. Wet grinding is a preferable option using a copious supply of coolant. If dry grinding is resorted to then use a very soft wheel.

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