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4340, DIN1.6580, 30CrNiMo8,SNCM431 Hardened Steel

4340, DIN1.6580, 30CrNiMo8,SNCM431 Hardened Steel

4340, DIN1.6580, 30CrNiMo8,SNCM431  Hardened Steel
CategoriesQuenched and Tempered Steel Bars
AlbumView larger image
Brandfushun
Model4340, DIN1.6580, 30CrNiMo8,SNCM431
ProductHardened steel
Applicationhighly stressed components
Similar steel grades4340, DIN1.6580, 30CrNiMo8,SNCM431
FOB portshanghai
Terms of PaymentL/C, T/T
Update Time2019-01-21
Detail Information

Chemical Composition(%)

Steel GradeCMnSiPSCrNiMo
30CrNiMo80.26-0.340.50-0.800.40 max0.025 max0.035 max1.80-2.201.80-2.200.30-0.50
43400.38–0.430.60-0.800.15-0.350.035 max0.040 max0.70-0.901.65-2.000.20-0.30
SNCM4310.27-0.350.60-0.900.15-0.350.030 max0.030 max0.60-1.101.60-2.000.15-0.30



All Grades Comparison

Material no.DINBSASTM
1.658030CrNiMo8823M304340
AFNORISOГOCTJIS
30CND831CrNiMo83KH3M3F

SNCM431


    

Mechanical Properties(T=20°C if not differently stated)

Heat treatment stateDiameter(mm)Rm (Mpa)Rp0.2 (Mpa)Fracture elongation A5 (%)Notch impact energy ISO-V [J]Hardness (HB)
SOFT ANNEALED/844 min///250 max
ISOTHERMAL ANNEALED/615-815///183-242
QUENCHED AND TEMPERED16 max880-1080685 min16 min40 min289-347
QUENCHED AND TEMPERED16-40930-1080735 min16 min40 min275-318
QUENCHED AND TEMPERED40-100880-1030685 min17 min40 min261-303
QUENCHED AND TEMPERED100-250785-935635 min18 min35 min233-276
QUENCHED AND TEMPERED250-500735-885590 min16 min35 min218-262

   
    

Applications

Alloyed heat treatable steel with a typical tensile strength of 1100 -1300 N/mm². Used for highly stressed components, where the combination of high strength with tenaciousness is of utmost importance. High cold formability: Parts of different shape can be manufactured, a favorable fibering for stress, a very good surface condition and an high dimensional accuracy. When cold formed the smooth surface leads to an increased fatigue and vibratory strength.

  

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