PROPERTIES AND EMPLOYEMENTS
IT IS THE MOST USED QUENCHED AND TEMPERED STEEL THANKS TO THE GREAT RELATIONSHIP CHARACTERISTICS/COSTS.
IT HAS AN ELEVATED HARDENABILITY, GOOD HEAT RESISTANCE, EXCELLENT FORGING AND GOOD MACHINABILITY WITH MACHINE TOOLS. IT CAN BE HARDENED ON THE SURFACE OR NITRITED IN ORDER TO ELEVATE THE WEAR RESISTANCE AND THE FATIGUE STRENGTH.
QUENCHED AND TEMPERED AND NITRITED GEARS CAN SUBSTITUTE THE CASE-HARDENED AND HARDENED ONES, IF THEY ARE NOT SUBMITTED TO TOO ELEVATED PRESSURE.
CORRESPONDENCE TO INTERNATIONAL DESIGNATIONS
| QUALITY | EUROPE | GERMANY | FRANCE | SPAIN | G.B. | USA | |
|---|---|---|---|---|---|---|---|
| EN | DIN | W.n. | AFNOR | UNE | B.S. | AISI/SAE | |
| 42CrMo4 | 42CrMo4 | 42CrMo4 | 1,7225 | 42CD4 | F1252 | 708M40 | 4140 |
CHEMICAL COMPOSITION % (EN 10083-3)
| STEEL DESIGNATION | CHEMICAL COMPOSITION | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| SYMBOLIC | NUMERIC | C |
Si max |
Mn |
P max |
S | Cr | Mo | Ni | V |
| 42CrMo4 | 1,7225 | 0,38 ÷ 0,45 | 0,40 | 0,60 ÷ 0,90 | 0,025 | max. 0,035 | 0,90 ÷ 1,20 | 0,15 ÷ 0,30 | - | - |
| 42CrMoS4 | 1,7227 | 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 (EN 10083-3)
| STEEL | MECHANICAL CHARACTERISTICS FOR THE REDUCED SECTION (EN 10083-1:2006, ATTACHMENT A) WITH A DIAMETER (D) OF | |||||||||||||||||||||||||
| d ≤ 16mm | 16mm < d ≤ 40mm | 40mm < d ≤ 100mm | 100mm < d ≤ 160mm | 160mm < d ≤ 250mm | ||||||||||||||||||||||
| SYMBOLIC | NUMERIC | Re min | Rm | A min | Z min | KVb min | Re min | Rm | A min | Z min | KVb min | Re min | Rm | A min | Z min | KVb min | Re min | Rm | A min | Z min | KVb min | Re min | Rm | A min | Z min | KVb min |
| N/mm2 | % | % | J | N/mm2 | % | % | J | N/mm2 | % | % | J | N/mm2 | % | % | J | N/mm2 | % | % | J | |||||||
| 42CrMo4 | 1,7225 | 900 |
1100 to 1300 |
10 | 40 | - | 750 |
1000 to 1200 |
11 | 45 | 35 | 650 |
900 to 1100 |
12 | 50 | 35 | 550 |
800 to 950 |
13 | 50 | 35 | 500 |
750 to 900 |
14 | 55 | 35 |
| 42CrMoS4 | 1,7227 | |||||||||||||||||||||||||
JOMINY HARDENABILITY (EN 10083-3)
| STEEL DESIGNATION | SMBOL | 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 | 45 | 50 | ||
| 42CrMo4 | 1,7225 | +H | max | 61 | 61 | 61 | 60 | 60 | 59 | 59 | 58 | 56 | 53 | 51 | 48 | 47 | 46 | 45 |
| 42CrMoS4 | 1,7227 | +H | min | 53 | 53 | 52 | 51 | 49 | 43 | 40 | 37 | 34 | 32 | 31 | 30 | 30 | 29 | 29 |
USUALLY AVAILABLE EX STOCK
| M.T. COLORATION | QUALITY | HEAT TREATMENT | SURFACE | DIAMETER (mm) |
|---|---|---|---|---|
 |
42CrMo4 | Quenched and tempered |
rolled reeled forged turned peeled h11 / drawn |
80-330 340-800 20-80 |
 |
42CrMo4 |
Quenched and tempered |
rolled reeled rolled, rough |
80-320 |
 |
Download technical sheet |