Structural alloyed steel for carburization 16 CrMo 12, 16NCD13, 14ChN3M for heavy duty machine parts, structures and devices according to UNI 7846, UNI 8788.

 

StandardsSteel Grade
Chemical composition %
C:Mn:Si:P:S:Cr:Ni:Mo:Cu:Al:
UNI16NiCrMo12 - 16 NiCrMo 12
0.13 - 0.180.4 - 0.70.15 - 0.40<0.035<0.0350.80 - 1.102.7 - 3.20.3 - 0.4--
GOST14ChN3M - 14KhN3M - 14HN3M - 14ХН3М
0.11 - 0.170.3 - 0.6<0.40<0.025<0.0350.80 - 1.103.0 - 3.50.2 - 0.3--
AFNOR16NiCrMo13 - 16 NiCrMo 13
0.12 - 0.170.3 - 0.60.15 - 0.35<0.025<0.0150.90 - 1.153.0 - 3.50.15 - 0.30<0.35<0.05
AFNOR16NCD13 - 16 NCD 13
0.170.45---1.03.250.25--
UNI15NiCrMo13 - 15 NiCrMo 13
0.12 - 0.170.3 - 0.60.15 - 0.40<0.030<0.0250.8 - 1.13.0 - 3.50.2 - 0.3--
BS832M13 - 832 M 13 - 832H13 - 832M13
0.10 - 0.160.35 - 0.600.10 - 0.35<0.035<0.0400.7 - 1.03.00 - 3.750.10 - 0.25--
BSS157 - S.157
0.170.45---1.03.250.25--
ASTMAISI 9310H - AISI 9310 H
0.07 - 0.130.4 - 0.70.15 - 0.35<0.040<0.0351.00 - 1.452.95 - 3.550.08 - 0.15--

 


16NiCrMo12 - application and description

Structural steel 16NiCrMo12 is an alloy grade for thermo-chemical treatment - carburizing. It is mainly used in the aviation industry for particularly heavy duty parts and components. The 16NiCrMo12 steel is a grades mostly used to make special screws, sleeves, drive shafts, cogwheels, and connecting rods.


Mechanical properties of 16NiCrMo12 in 10 - 60mm dimensions:

  • Tensile strength, Rm: 980 - 1520 MPa
  • Yield point, Re: 735 - 980 MPa
  • Elongation, A: 9 - 10%
  • Notch toughness, KCU: 32,5 - 42,5 J
  • Hardness in annealed condition < 250 HB
  • Hardness after isothermal annealing, 190 - 237 HB
  • Hardness after spheroidizing annealing < 225 HB

 


Heat treatment processes:

  • Normalising annealing at 830 - 860 °C
  • Annealing with isothermal transformation at 800 - 840 ℃, with cooling at 620 ℃ for 5 hours
  • Quenching at 820 - 840℃ or 790 - 810℃
  • Tempering at 160 - 200℃

 


In the above mentioned grades Virgamet supplies companies with:

 


The other alternatives and substitutes:

16NCD13, 16 NCD 13, 14HN3M, 14ChN3M, 14KhN3M, 16NCD12, 16 NCD 12, 20HN3MA, 20ChN3MA, 20KhN3MA, 14ХН3М, 14ХН3МА, 20ХН3МА, 19NiCrMo11-5F, 22NiCrMo12-5F, 23NiCrMo12-5F, 25NiCrMo12-5F, BNCMo 2, BNCMo2, 15Ni13Cr3Mo2, 15NiCrMo13, 15 NiCrMo 13, AISI 9310H, AISI 9310, G93100, G93106, H93100, H93104, H93106, AISI 9314.


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