Project Description

EN19 steel Manufacturer and Exporter,supplied with round,square,flat,block,and shaft etc.

EN19/709M40,containing 1% Chromium-Molybdenum  elements,is widely used as alloy engineering steel.It will get high tensile strength  combined with good ductility,shock resistance and good wear resistance after heat treatment.EN19 steel is usually supplied with annealed condition(Max hardness below 248HB) after forged,and also suitable for quenched and tempered condition with tensile ranges of R(695-850Mpa),S(775-925Mpa),T(850-1000Mpa),U(925-1080Mpa),V(1000-1160Mpa),W(1080-1235Mpa),and Y(1235-1390Mpa).

EN19 forged round steel
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1.Supply Form & Size & Tolerance

Hot Forged Round bar:Φ80-Φ1000mm

Hot Rolled  Round bar:Φ16-Φ280mm

Hot Forged Square bar: Max Thickness:500mm

Flat bar/Blcoks:Thickness :120-800mm ,Width:120-1500mm

Surface FinishBlack-Forged Black-Rolled Turned   GrindingPolishedPeeledCold Drawn
Tolerance(0,+5mm)(0,+1mm)(0,+3mm)Best h9Best h11Best H11Best H11

2.Chemical Composition

GradeCSiMnPSCrMo
EN190.35-0.450.10-0.350.5-0.8≤0.05≤0.050.9-1.50.2-0.4
709M400.36-0.440.1-0.40.7-1.0≤0.035≤0.040.9-1.20.25-0.35

EN19 Series For Speical Applications:EN19A,EN19B,EN19C.

GradeCSiMnPSCrMo
EN19A0.35-0.450.10-0.350.5-0.8≤0.05≤0.050.9-1.20.2-0.35
EN19B0.35-0.400.10-0.350.5-0.8≤0.05≤0.050.9-1.20.2-0.35
EN19C0.40-0.450.10-0.350.5-0.8≤0.05≤0.050.9-1.20.2-0.35

3. Equivalent Grade

USAGermanyChinaJapanFranceRussia
414042CrMo4/1.722542CrMoSCM44042CD442HM

4. Mechanical Property


Condition
Hardened & Tempered
RSTUVWY
Ruling Section,inch642 1/22 1/21 1/81 1/81
Tensile Strength,Mpa,Min695775850925100510801235
Yield Strength,Mpa,Min5255856807408058951050
Elongation,Min22201817161510
ISO V Impact,J,Min54545448484114
Hardness,HBW201-255223-277248-302269-321293-341311-375363-415

0.2% Proof Stress tests value with Quenched & Tempered condition

PropertyRSTUVWY
Proof Stress(0.2%) Mpa,Min495555635710775850990

5.Forging  Steel

Recommended Forging temperature:850℃- 1150℃,and final forging temperature should not below  850℃.This material should be cooled as slowly as possible in still air or in sand after forged.

6.Heat Treatment

  • Normalizing

Normalizing is used to refine the structure of forgings that might have cooled non-uniformly after forged,and considered as a conditioning treatment before final heat treatment.Normalizing temperature for EN19 steel should be carried out between 870℃-900℃ with several steps,keep proper holding time depend on the steel size for the steel to be thoroughly heated to complete the ferrite to austenite transformation.Cool in still air.

  • Annealing

Annealing is generally applied after forged and before machining to reduce surface harness,and get finer grain,get good machinability.

Soft Annealing:Heat the steel to the temperaure 680℃-700℃,Holding temperature for the steel heating, Cool slowly in the furnace.

Full Annealing:Heat the steel to the temperaure 850℃ with three steps ,Holding temperature for the steel heating,Cool in furnace.Surface hardness after annealing will be below 248HB.

  • Hardening

Hardening temperature is carried out from an austenitizing temperature of 850-880ºC with several steps,keep suitable time for the steel to be thoroughly heated,  oil quenching is recommended.

  • Tempering

Tempering process should be followed after quenching immediately.Tempering at a suitable temperature ranges of 550-720ºC

7.Application

With good performance,EN19 alloy engineering steel,is widely used in automotive ,oil & gas,and machine tool and motor industries and a wide variety of applications where a good quality high tensile steel grade is required.

Typical applications

  • Automotive gears and parts
  • Shatfs & axles
  • Studs & Bolts
  • Towing pins
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