

   


TECHNICAL CARD
According to standards  
GRUPPO LUCEFIN
REVISION 2014
Number  
ALL RIGHTS RESERVED


     
max max max 
0,140,19 0,40 1,001,30 0,025 0,035 0,801,10 Product deviations are
± 0.02 + 0.03 ± 0.05 + 0.005 + 0.005 ± 0.05 allowed
16MnCrS5 n° 1.7139 S% 0.0200.040 product deviation ± 0.005%
On request, this steel grade can be supplied with addition of lead (Pb) 0.150.35%

      
  
1150850 880 860900 750930 880980 810840 oil 150
air oilpolymer gas polymer salt 200
(HB 138187) salt bath bath (160250 °C)
     
    
650700 870 furnace 730750 furnace 870 welding must be carried out on the annealed state
furnace cooling cooling to cooling 50 °C/h to water and before carburizing
650, then air 680, pause, 150350 600 furnace cooling
cooling to 400   *core
then air **carburizing surface
740 840 400* 200**
(HB max 207) (HB 156207) (HB 140187)
   
9501000 quick cooling to 630650, stop according to the thickness of the 600620
material, then air (HB 140187) (HB max 230)

values obtained on test blanks after  + stressrelieving UNI 7846: 1978. Use only as reference
size Testing at room temperature (longitudinal)
mm  0.2 % %   
test blanks N/mm2 N/mm2 min. min. min. J min.  
11 10301370 735 8 25 
30 7401030 490 9 25  for information only
63 640930 440 10 25  for information only
Hotrolled natural state. experience
sizemm  0.2 % %  
N/mm2 N/mm2 min. min. min. J min. max
from 10 to 100 560720 350 15 25 207
values at room temperature on rounds of Ø 10 mm after quenching at 870 °C in oil
  390 385 385 385 385 381 376 362 348 319 286 240 213 200
  42 41.5 41.5 41.5 41.5 41 40.5 39 37.5 34 30 22.5
 N/mm2 1340 1335 1330 1330 1320 1300 1260 1210 1150 1050 950 800 700 650
0.2 N/mm2 1020 1060 1110 1140 1145 1140 1110 1070 1010 930 830 710 620 560
 % 12.0 12.5 12.5 12.5 12.0 12.0 12.5 13.0 14.0 15.5 17.5 20.0 23.0 25.5
 % 52.0 52.0 53.0 54.0 55.0 57.0 59.0 61.0 63.0 64.0 68.0 72.0 75.0
 J 42 46 46 45 42 40 42 62 90 124 135 155 180 194
carburizing 64 63 62 60.5 59 57
Tempering at              
 16MNCR5 STEELS
16MnCr5 steel are alloyed case hardening engineering steels for parts which require core
tensile strength of 800 – 1100 N/mm² and good wearing resistance. It is an engineering material
typically used to manufacture piston bolts, camshafts, levers and other vehicle and mechanical
engineering components.
16MnCr5 Steel is defined as Mn-Cr case hardening steel as per EN10084 Standard. Compared
with 16MnCr5 has a little higher on Carbon, Manganese and Chromium, of them have good
hardenability, machinability and wear resistance, but poor in weldability.They are also supplied
as 16MnCrS5 with “S” control 0.02-0.04%.16MnCr5/20MnCr5 are suitbale for gears, screws,
bolts, bushing and camshafts.

1. 16MNCR5 Steel Grade in Specification:

16MnCr5 steel is alloyed case hardening engineering steels for parts that require core tensile
strength of 800 – 1100 N/mm² and good wearing resistance. It is an engineering material
typically used to manufacture piston bolts, camshafts, levers, and other vehicle and mechanical
engineering components. 16MNCR5 Grade is also available in different shapes like Round,
Flat, and Square steel Bars.
 2. 16MNCR5 Steel is Available in Following Shape:

 16MNCR5 ROUNDS
 16MNCR5 FORGED ROUNDS
 16MNCR5 FORGED FLATS & SQUARES.

3. Chemical Composition:

The following table shows the chemical composition of 16MNCR5 steel:

Element C Si Mn P S Cr

Content
(%) 0.14～0.19 ≤0.40 1.00～1.30 ≤0.035 ≤0.035 0.80～1.10

4. Mechanical properties:

The mechanical properties of annealed DIN 16MnCr5/1.7131 gearing steel (typical for
steel) are outlined in the table below:

Bulk Shear Poisson’s Thermal

Tensile Yield modulus modulus ratio conductivity

MPa Mpa Gpa Gpa W/mK

520 415 Min 140 80 0.27-0.30 46.6

5. Heat treatment Related:

 Annealing of 16MnCr5|1.7131 Alloy gearing steel

Slowly heated to 790-810 ℃ and allow enough times, let the steel to be thoroughly heated, then
cool slowly in the furnace. Different annealing ways will get different hardness. The
16MnCr5|1.7131 gearing steel will get Hardness MAX 248 HB （Brinell hardness).

 Quenching and temperature of 16MnCr5 Alloy gearing steel

 Heated slowly to 788°C, Then put in salt-bath furnace keep 1191 ℃to 1204 ℃。
quenching by oil get 60 to 66 HRc hardness.
 High temperature tempering: 650-700℃，cool in air, get hardness 22 to 30HRC.
 Low temperature tempering: 150-200 ℃， Cool in ari, get 61-66HRC hardness.
 Hot work and cold work of 16MnCr5 gearing steel
DIN 16MnCr5 gear steel can hot worked at 205 to 538°C, 16MnCr5|1.7131 gearing steel can
be cold worked using conventional techniques in the annealed or normalized conditions.

6. Applications of 16MNCR5 Steel

16MNCR5 steel material is suitable for the all general engineering applications requiring a
higher strength than mild steel such as:

 General-purpose axles
 Shafts
 Gears
 Bolts and studs
 Spindles
 Automotive and general engineering components
 Other general engineering parts etc.