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EN43 properties and heat treatment forged piece, Including EN43 application and specifications, We have all specifications,Including EN43 steel plate, EN43 sheet, EN43 square steel, EN43 flat bar,EN43 round bar,EN43 forgings, we can own production and sales.

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forged/hot rolling/ extrusion of steel

We can produce the EN43 has the following specifications:

Round bar steel: 1mm to 3000mm

Square-shape steel: 1mm to 2000mm

Plate steel:0.1mm to 2500mm

Width: 10mm to 2500mm

Lenth: We can supply any lenth based on the customer's requirement.

Forging: Shafts with flanks/pipes/tubes/slugs/donuts/cubes/other shapes

Tubings: OD: φ6-219 mm, with wall thickness ranging from 1-35 mm.

Finished goods condition: hot forging/hot rolling + annealing/normalizing + tempering/quenching + tempering/any conditions based on the customer's requirement

Surface conditions: scaled (hot working finish)/ground/rough machining/fine machining/based on the customer's requirement

Furnaces for metallurgical processing: electrode arc + LF/VD/VOD/ESR/Vacuum consumable electrode.

Ultrasonic inspection: 100% ultrasonic inspection for any inperfections or based on the customer's requirementExcellent service for all kinds of industries,with advantages of technologies, equipment and price.

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Chemical composition % of the ladle analysis of grade EN43 and Standards

EN43 is an unalloyed medium carbon spring steel type specification. It is supplied in the as rolled or cold drawn condition. EN43 is available from stock in bar and can be cut to your requirements. We also offer EN43 plate flame cut to your required sizes and normalised.




Heat slowly and uniformly to 1100°C. After Forging cool slowly.

Heat uniformly to 700°C. Soak well and cool slowly in the furnace.

Heat uniformly to 820/840°C until heated through. Quench in oil, or water.

Heat uniformly and thoroughly at the selected tempering temperature, between 550/660°C and hold at heat for one hour per inch of total thickness.

Hard Chromium Plating:
After hard chromium plating, the steel should be tempered for approximately 4 hours at 180°C, in order to avoid hydrogen embrittlement.

Firstly heat to approximately 100-350°C. Use an unalloyed basic electrode, for Welding unalloyed structural steels.

Normalise at 840-870°C, and cool in air.

Stress Relieving:
After rough machining tools should be stress relieved. Soaking time 2 hours after the whole piece has attained a temperature of approximately 675°C. Cool in furnace to approximately 500°C, and then freely in air. 


Physical Properties:


Coefficient of Thermal Expansion
Modulus of Elasticity
per c from 20 c


Machining performance

Download EN43 the mechanical properties of the report, the report provides detailed performance analysis and application. Download >>

Principal Design Features

One of the most widely used precipitation hardening grades in the business. While soft and ductile in the solution annealed condition, it is capable of high properties with a single precipitation or aging treatment. Characterized by good corrosion resistance, high harness, toughness and strength.


Long, gummy chips characterize this alloys machinability. It can be machined in the annealed condition, however condition H1150M will yield best results. Post machining solution treatment of parts will be required prior to final hardening if machining in this condition.

Heat Treatment

CONDITION A--Soak at 1900 F (1038 C) for 30 minutes and cool below 60 F (16 C) for complete martensite transformation. CONDITION H 950- Treat Condition A material at 900 F(482 C) for 1 hour, air cool.. CONDITION H925, H1025, H1075, H1100, H1150- Soak solution treated material for 4 hours at specified temperature, air cool, CONDITION H1150M- Soak solution treated material at 1400 F (760 C) for 2 hours, air cool, then re-heat to 1150 F (620 C) for 4 hours and air cool.


Successfully welded by common fusion and resistance methods, this alloy should not be joined by oxyacetylene welding. AWS E/ER630 filler metal is recommended if required.


Soak for 1 hour at 2150 F (1177 C) prior to forging. Do not work below 1850 F (1010 C). Post-work solution treatment is required prior to final hardening.

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