the yield strength of EN8 material is 465MPa.
The tensile strength of EN8 varies from 500-800 N/mm2.
900kg/sqrmm .
mechnical properties of hardened steel
En8 is low carbon steel and it can be toughned. En24 is medium carbon steel and it is generally called forged steel.
800n/mm2
EN24 is a (1.5% Ni,Cr,Mo) steel in US equivalent to SAE 4340,Chemical Composition % - Carbon 0.35-0.45/ Silicon 0.10-0.35/ Manganese 0.45-0.70/ Nickel 1.30-1.80 / Chromium 0.90-1.40/ Moly 0.20-0.35/ Sulphur 0.050 (max)/ Phosphorous 0.050(max).Mechanical Properties -Limiting Ruling Section (in) - 6Tensile Strength (tons/sq.in.) - 55 (min)Proof Stress (tons/sq.in.) - 41 (min)Elongation % - 18 (min)Izod Impact Value (Ft.Lb.) 40(min)Weldability - POORApplication - High tensile steel suitable for pump shafts and turbine rotors in general and for similar uses. Non-preferred but sometime used in place of EN 27 steel when the later not available.
en 24 grade which welding rod use?
EN24 is a high quality, high tensile, alloy steel . Usually supplied readily machineable in 'T' condition, it combines hightensile strength, shock resistance, good ductility and resistance to wear. EN24 is available from stock in round bar, flat barand plate.TYPICAL ANALYSISEN24C.Si.MnNi.Cr.Mo.0.40%0.30%0.60%1.50%1.20%0.25%Hardening:Heat uniformly to 823/850°C until heated through. Quench in oil.Tempering:Heat uniformly and thoroughly at the selected tempering temperature, up to 660°C and hold at heat for two hours per inch oftotal thickness. Tempering between 250-375°C in not recommended as this can seriously reduce the steels impact value.Stress Relieving:Heat slowly to 650-670°C, soak well before cooling the EN24 tool in a furnace or in air.Mechanical PropertiesHeatTreatmentTensileStrengthRm N/mm²YieldStressRe N/mm²a% on5.665ÖSoImpactIzod JImpactKCV JProofStressrp0.2HardnessHBSizemmT850/1000654134035635248/302>150≤250T850/1000680135450665248/302>63≤250U925/1075755124754740269/331>29≤100V1000/1150850124742835293/352>13≤63W1075/1225940114035925311/375>6≤29X1150/130010201034281005345/401>6≤29Z1550123551091125444>6≤29
European Norms
42 to 45 HRC
its 7.8kg/m3 @ 20degree celsius
EN8 also know as 080M40. An unalloyed medium carbon steel. EN8 is a medium strength steel, good tensile strength. Suitable for shafts, stressed pins, studs, keys etc. AISI 1040.Available as normalised or rolled. EN8 is supplied as round drawn/turned, round hot rolled, hexagon, square, flats and plate.Chemical Composition BS 970:1991/1983 Nearest Equivalent C Si Mn Ni Cr Mo S P % % % % % % % % En8 0.35/0.45 0.05/0.35 0.60/1.00 - - - 0.06Max 0.06Max 080m40Chemical Composition BS 970:1991/1983 Nearest Equivalent C Si Mn Ni Cr Mo S P % % % % % % % % En8 0.35/0.45 0.05/0.35 0.60/1.00 - - - 0.06Max 0.06Max 080m40Chemical Composition BS 970:1991/1983 Nearest Equivalent C Si Mn Ni Cr Mo S P % % % % % % % % En8 0.35/0.45 0.05/0.35 0.60/1.00 - - - 0.06Max 0.06Max 080m40 Chemical Composition BS 970:1991/1983 Nearest Equivalent C Si Mn Ni Cr Mo S P % % % % % % % % En8 0.35/0.45 0.05/0.35 0.60/1.00 - - - 0.06Max 0.06Max 080m40 C Si Mn Ni Cr Mo S P % % % % % % % % En8 0.35/0.45 0.05/0.35 0.60/1.00 - - - 0.06Max 0.06Max 080m40CSiMnNiCrMoSP%%%%%%%%0.35/0.450.05/0.350.60/1.00---0.06Max0.06Max
emergency number. These numbers were actual devised for use during the period of the second world war and remained in useinto the 1970's and beyond the actual full description was in the form BS970 EN8 for example they were effectively made obsolete when the system was implemented EN8 became 080M40 wher the M refered to mechenical properties ( or A for analysis or rather chemical properties), and the number refering to the chemical composition of key elements. For example the 40 of M 40 refers to the carbon range other examples would be EN16 became 605M36 0r EN24 becomes 817M40
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