20MnCr5 Steel ,also refers to DIN 1.7147 steel as per European standard EN10084.As the representative steel of the Chromium-Manganese series of case hardening steel,it has high strength and toughness.After quenching, the deformation is small and has good hardenability and low temperature toughness.20MnCr5 has relatively good machinability, but it is poor in welding performance.

20MnCr5/DIN 1.7147 Steel is usually used after carburizing and quenching or quenching & tempering.It is generally used for the manufacture and heavy-duty of large cross-section quenched and tempered parts and small cross-section carburized parts,also be used to manufacture medium and small parts with medium load and low impact,such as gears,shafts,friction wheels of variable speed equipment, worms, The sleeve of the governor,etc.

Available Types & Range

Form of Supply Size(mm) Length(mm)
Round bar Φ 16 -Φ 140 Standard or As your request
Forged Rounds Φ 140  – Φ 650 Standard or As your request
Forged Flats Thickness : 65 – 450
Width: 130 – 650		 Standard or As your request

Chemical Composition & Technical Specification -20MnCR5

Grade C Si Mn P S Cr
20MnCr5/1.7147 0.17-0.22 ≤ 0.4 1.1-1.4 ≤ 0.025 ≤ 0.035 1.0-1.3

China/GB 3077 USA/ASTM A29 Japan/JIS G4053 France/AFNOR NF A 35-551 Germany/DIN 17210
20CrMn 5120 SMnC420 20MC5 20MnCr5

20MNCR5 /DIN 1.7147 STEEL HEAT TREATMENT 

Normalizing,°C Annealing,°C Carburizing,°C Core Hardening,°C Case Hardening,°C Tempering,°C
880-920 840-860 880-980 860-900 780-820 150-200

20MNCR5 /DIN 1.7147 MECHANICAL PROPERTY

  • Annealed Condition
Tensile Strength,Mpa Yield Strength,Mpa Elongation,% Charpy Impact, J Brinell Hardness,HB
500-650 ≥ 300 ≥ 20 ≥ 50 ≤187
  • Quenched and Tempered Condition
Tensile Strength,Mpa Yield Strength,Mpa Elongation,% Reduction of Area,% Charpy Impact, J
≥930 ≥735 ≥10 ≥45 ≥47
  • Hardenability Limits
Distance from quenched end mm 1.5 3 5 7 9 11 13 15 20 25 30 35 40
HRC Min 41 39 36 33 30 28 26 25 23 21 – – –
HRC Max 49 49 48 46 43 42 41 39 37 35 34 33 32

20MNCR5/DIN 1.7147 STEEL SUPPLY FORM & SIZE

Hot Forged Products

  • Round :  Dia.80 – 1,000mm
  • Flat / Square :  Thickness Max.800mm
  • Rings,Tubes,Shafts, Rollers, Blocks:  Customized or According to Drawing

Hot Rolled Products

  • Round :  Dia.14 – 280mm with Annealed Condition,UT quality assurance
  • Other Shapes:Customized

20MNCR5/DIN 1.7147 STEEL-THE ULTIMATE FAQ BUYING GUIDE

There are many kinds of materials for gear applications in the market. For 20MnCr5 steel, as a common Cr-Mn series gear material, how much do you know about it?If you are interested, congratulations, you have come to the right place.

Through our specific guidance, we will fully describe the characteristics of 20MnCr5 steel,so as to further help you understand and use it.In addition, good ideas will be provided to help you identify other types of steel.