• Uncompromising quality

  • Uncompromising quality

  • Uncompromising quality

  • Uncompromising quality

  • Uncompromising quality

  • Uncompromising quality

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16NiCr4 (UNI EN 10084)

 

PROPERTIES AND EMPLOYEMENTS
IT IS AN EXCELLENT CASE-HARDENING STEEL, CONSIDERED BY THE NORM UNI EN 10084, IT SUBSTITUTES THE 16CrNi4, REGULATED BY THE NORMS UNI 7846 AND UNI 8550, IT IS SUBSTANTIALLY SIMILAR TO IT, WITH AN AVERAGE CHROMIUM CONTENT THAT IS SLIGHTLY HIGHER.
IT IS PROBABLY THE MOST USED CASE-HARDENING STEEL IN THE AUTOMOTIVE INDUSTRY, THANKS TO THE GOOD MACHINABILITY AT THE ANNEALING CONDITION AND TO THE APTITUDE TO HEAT TREATMENT, WHICH RESISTS WITHOUT RELEVANT DEFORMATIONS. IT HAS A GOOD HARDENABILITY WITH A GOOD STRENGTH AT THE CORE, UP TO A THICKNESS OR DIAMETER OF MM 50.

 

CORRESPONDENCE TO INTERNATIONAL DESIGNATIONS

QUALITY EUROPE GERMANY FRANCE SPAIN G.B. USA
EN DIN W.n. AFNOR UNE B.S. AISI/SAE
16NiCrS4 16NiCrS4       F1581 637M17  

CHEMICAL COMPOSITION % (EN 10084)

STEEL DESIGNATION CHEMICAL COMPOSITION
SYMBOLIC NUMERIC C Si
max
Mn P
max
S Cr Mo Ni B
16NiCr4 1,5714 0,13 ÷ 0,19 0,40 0,70 ÷ 1,00 0,025 ≤ 0,035 0,60 ÷ 1,00 - 0,80 ÷ 1,10 -
16NiCrS4 1,5715 0,020 ÷ 0,040

CONCENTRATION LIMITS OF THE ELEMENTS THAT ARE NOT INDICATED IN THE TABLE CAN BE DEDUCED IN THE EN 10020 REGULATION.

MECHANICAL CHARACTERISTICS (UNI 7846)

STEEL QUALITY BAR'S DIAMETER TENSILE TESTING IMPACT STRENGTH
KCU min
UNIFIED TENSILE STRENGTH
R
DEVIATION FROM PROPORTIONALITY
Rp 0,2 min
ELONGATION
A min
mm N/mm2 kgf/mm2 N/mm2 kgf/mm2 % J
16NiCr4 11
(30)
(63)
1080÷1470
(830÷1130)
-
110÷150
(85÷115)
-
835
(590)
-
85
(60)
-
9
(10)
-
30
(32,5)
-

JOMINY HARDENABILITY (EN 10084)

STEEL DESIGNATION RANGE LIMITS HRC HARDNESS MEASURED FROM THE QUENCHED END OF THE TEST TUBE (MM)
SYMBOLIC NUMERIC 1,5 3 5 7 9 11 13 15 20 25 30 35 40
16NiCr4+HH 1,5714+HH max 47 46 44 42 40 38 36 34 32 30 29 28 28
16NiCrS4+HH 1,5715+HH min 42 39 37 33 31 29 27 26 24 22 21 20 20

USUALLY AVAILABLE EX STOCK

M.T. COLORATION QUALITY HEAT TREATMENT SURFACE DIAMETER (mm)
16NiCr4 Soft-annealed rolled
drawn / peeled h11
20-260
16-80
16NiCr4
high machinability
Soft-annealed rolled
peeled
20-80
19-78

 

 
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Steels

Our steel always comes from the same European steelworks, which guarantee a continuity for what concerns quality. The constant quality of the supplies allows to have repetitive parameters in mechanical processing and a greater control over deformations during heat treatment.

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Machining

Precise cuttings of small and big series are guaranteed by the employement of latest generation automatic saws that were projected and realized in order to guarantee precision standards required by customers, reducing processing wastage.

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Quality

The certification and introduction of the Quality System management allowed M.T.Acciai to improve not only its efficiency, but also the quality that is offered, in order to better meet our customers’ needs.

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