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4140 Tempering Chart

4140 Tempering Chart - Heat at a rate not exceeding 400°f per hour (222°c per hour) to 1500°f (816°c), and hold at temperature for 1 hour per inch (25.4mm) of maximum thickness; The hardness of the steel can be increased if it has a lower tempering temperature. 4140 ht can also be surface hardened to increase wear resistance. Hold at temperature for 1 hour per inch (25.4 mm) of thickness, 2 hours minimum, then air cool to ambient temperature. For example, a tensile strength of 225 ksi can be achieved by tempering at 316°c (600°f), and tensile strength of 130 ksi can be. Temper ½ to 2 hours at between 175 and 230°c, while for yield strength below Select tempering temperatures according to the required mechanical properties (refer to tempering curve). Good elongation with quality impact & abrasion resistance. For yield strengths above 1380mpa: Characterised by high strength and good impact properties with good machinability, but low weldability.

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For Yield Strengths Above 1380Mpa:

4140 tfht flats are readily available, and can be surface ground to tool steel tolerances. Remove the metal from the furnace and allow to cool in ambient air. 4140 ht can also be surface hardened to increase wear resistance. Web aisi 4140 is capable of resisting creep in temperatures up to 538°c (1000°f) and maintaining its properties even after long exposure at comparatively high working temperatures.

Web Parts Should Be Welded In The Hardened And Tempered Condition.

Web aisi 4140 alloy steel can be tempered at 205 to 649°c (400 to 1200°f) depending upon the desired hardness level. Iso 9001 certifie usa s british assessment. The hardness of 4140 steel varies based on the toughness temperature and usually in the range of 217 hb to 241 hb. Tempering reduces the brittleness of the steel, improves its toughness, and relieves residual stresses.

Strength Properties Of The Joint Will Not Be The Same As The Base Metal.

Automotive parts, armament components, jigs, fixtures, tooling, gears, sprockets, wrenches &. Web the specification defines the requirements for aisi 4140 hot rolled crmo bars hardened and tempered to meet 80ksi minimum yield, 22hrc maximum, in line with nace mr0175/iso 15156 or 110 ski minimum yield, 36 hrc maximum. Good elongation with quality impact & abrasion resistance. It belongs to the aisi/sae a29 standard.

Click Here To View All The Property Values For This Datasheet As They Were Originally Entered Into Matweb.

Here we talk about different aspects of sae 4140, including its chemical composition, mechanical properties, equivalent materials, and applications. For example, a tensile strength of 225 ksi can be achieved by tempering at 316°c (600°f), and tensile strength of 130 ksi can be. Tempering is the final step in the heat treatment process. Characterised by high strength and good impact properties with good machinability, but low weldability.

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