Product

China 33NiCrMoV14-5-Alloy steel

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China 33NiCrMoV14-5-Alloy steel is a heat treatable steel and usually supplied with quenched and tempered condition or Q & T condition and with a tensile strength of 1100 -1300 N/mm². 30CrNiMo8 steel is used for automotive and general components which requires high demands on strength and toughness and good hardenability.It is especially suitable for heavy duty parts in the aviation, automotive and military industries.

Reference standard

EN 10250-3: 2000 Open steel die forgings for general engineering purposes. Alloy special steels

Application

China 33NiCrMoV14-5-Alloy steel are widely used in the filed of ship, vehicle, airplane, guided missile, weapons, railway, bridges, pressure vessel, machine tools, mechanical components with a bigger sectional size and so on.

Chemical composition

C Si Mn Ni P S Cr Mo
0.26 – 0.34 max   0.4 0.5 – 0.8 1.8 – 2.2 max   0.025 max   0.035 1.8 – 2.2 0.3 – 0.5

Equivalent Grades of Steel 30CrNiMo8(1.6580)

EU Germany Japan France England China Russia Inter
EN DIN,WNr JIS AFNOR BS GB GOST ISO
30CrNiMo8 30CrNiMo8 SNCM431 30CND8 823M30 30Cr2Ni2Mo 3KH3M3F 31CrNiMo8

Size Tolerance

Surface Finish Size Tolerance Length
Black For Forged condition (0,+5 ~ +8mm) Multiple Length/Fixed Length
Black For Rolled condition (0,+1mm)
Rough Turned (0,+3mm)

Mechanical properties

  • Tensile Strength:min 847 N/mm2
  • Yield Strength:min. 824 N/mm2
  • Elongation:min.12 %(l)
  • Kv-Imapct value:min.23J (l)

Heat Treatment Conditions

  • +A   Soft annealed/Soft annealing
  • +N   Normalized/Normalizing
  • +QT  Quenched and Tempered
  • +U   Untreated
  • +SR  Stress Relieved

Normalizing:870℃-880℃,Cool in air

Soft Annealing:650℃-700℃,Cooling 10℃ per hour  in furnace,max. 248 HB

Stress Relieving:50°C under the temperature of tempering

Hardening:830 – 860°C,oil or polymer,840-850°C,water

Tempering:540°C – 660°C, cool in still air

Drawn and hot-rolled bars, flat bars 30CrNiMo8, 1.6580

Forgings and forged bars in grade 30CrNiMo8, 1.6580

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