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12NiCr3

Steel with a low chrome, nickel, and carbon content. Suitable for small pieces. It has a good cold deformability at the globular annealed state.

References and Comparable Standards

Standard Reference: UNI 7846: 78 (Hot-rolled and hot-rolled + turned products) | UNI 10233-5: 93 (Bright products)
EUROPE ITALY GERMANY FRANCE UK USA
EN 10084:2008
EN 10277-4:2008		 (UNI 7846-78) (DIN 17210-84) (NFA35-551-86) (BS970 pt.3--91) ASTM A 29
Grade N°   Werkstoff N°      
- -  12NiCr3 20MnCrS5 1.7149 - - -

Chemical Composition (Cast Analysis) (%)

EUROPE C Si Mn P/max S Cr  Mo/max Ni Al Pb
12NiCr3 0,09÷0,15 0,15÷0,40 0,30÷0,60  0,035 0,020÷0,035 0,40÷0,70 0,10 0,50÷0,80 0,020÷0,050 -
12NiCr3Pb 0,15÷0,30

Mechanical Properties - As Rolled Condition

Hardness (HB) - Soft annealed Hardness (HB) - Spherodizing Annealing to obtain a particular structure
≤ 179 ≤ 161 ≥ 131 ≤ 200

 

Mechanical Properties – Bright Steel

Size
(mm)		 Cold drawn products obtained from annealed hot rolled products Annealed + Cold drawn or annealed + Turned products
Soft annealed HB max Isothermal annealed HB max Soft annealed HB max Isothermal annealed HB
5≤d≤10 245 245 182 135÷203
10<d≤16 235 235 182 135÷203
16<d≤40 230 230 179 131÷200
40<d≤100 230 230 179 131÷200

For size <5 mm the mechanical properties may be agreed at the time of enquiry and order

Working Temperatures Recommended

Operation °C
Hot forgings deformation 900÷1150
Carburizing temperature  870÷900
Core quenching temperature   850÷880
Case quenching temperature 780÷820
Tempering 150÷200
Relevant Products
16MnCr5 - Nr.1.7131 16MnCrS5 - Nr.1.7139
16MnCr5 - Nr.1.7131 16MnCrS5 - Nr.1.7139

RM16 RM16Pb
20MnCr5 - Nr.1.7147 20MnCrS5 - Nr.1.7149
20MnCr5 - Nr.1.7147 20MnCrS5 - Nr.1.7149

RM20
16NiCr4 - Nr.1.5714 16NiCrS4 - Nr.1.5715
16NiCr4 - Nr.1.5714 16NiCrS4 - Nr.1.5715

RN2 RN2Pb
20CrNi4
20CrNi4

RN3
16NiCr11
16NiCr11

RG2
20NiCrMo2-2 - Nr.1.6523 20NiCrMoS2-2 - Nr.1.6526
20NiCrMo2-2 - Nr.1.6523 20NiCrMoS2-2 - Nr.1.6526

RC0
17NiCrMo6-4 - Nr.1.6566 17NiCrMoS6-4 - Nr.1.6569
17NiCrMo6-4 - Nr.1.6566 17NiCrMoS6-4 - Nr.1.6569

RC2 RC2Pb