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 |
 |
Download technical sheet |