EN19
EN19 Grade Introduction:
EN19 Steel is a high-quality engineering alloy steel containing chromium and molybdenum. It falls in a class of low alloy steel. It has high fatigue strength, abrasion and impact resistance, toughness, and torsion strength. It can be heat treated in a number of ways to give it a combination of properties. EN19 Steel is one steel grade in BS 970-1955 standard, which is the specification for wrought steels for mechanical and allied engineering purposes. Although there is a new version of BS 970-1996 latest edition. And EN19 steel grade is similar to the 709M40 grade in the new version. EN19 Alloy Forging Steel.
EN19 Grade Application:
- Originally introduced for use in the machine tool and motor industries for gears, pinions, shafts, spindles, and the like.
- Later applications extended to the oil and gas industries.
- Suitable for applications such as gears, bolts, studs, and a wide variety of applications where a good quality high tensile steel grade is suited.
EN19 Equivalent Grades:
| Internal Standard |
BS |
Din |
IS |
EN |
Sae/Aisi |
| EN19 |
709M40 |
42CrMo2 |
40Cr4Mo3 |
En19 |
4140 |
EN19 Chemical Composition:
| Element |
C |
Si |
Mn |
P |
S |
Cr |
Mo |
Fe |
| Content (%) |
0.35-0.45 |
0.15-0.30 |
0.50–0.80 |
0.035 |
0.040 |
0.90-1.50 |
0.20-0.40 |
96.78-97.77 |
Mechanical Properties:
| Properties |
Metric |
Imperial |
| Tensile strength |
655 MPa |
95000 psi |
| Yield strength |
415 MPa |
60200 psi |
| Bulk modulus (typical for steel) |
140 GPa |
20300 ksi |
| Shear modulus (typical for steel) |
80 GPa |
11600 ksi |
| Elastic modulus |
190-210 GPa |
27557-30458 ksi |
| Poisson’s ratio |
0.27-0.30 |
0.27-0.30 |
Physical Properties:
| DENSITY (G/CM 3) |
8.08 |
| DENSITY (LB/IN 3) |
0.292 |
| MELTING POINT (°C) |
1425 |
| MELTING POINT (°F) |
2600 |
Thermal Properties:
| Average Coefficient of Linear Thermal Expansion (μm/m.K) : |
| Temp. Range °C |
20-100 |
20-200 |
20-400 |
20-600 |
| Coefficient |
12.2 |
12.6 |
13.7 |
14.6 |
| Electrical Resistivity ( μΩ.m) and Thermal Conductivity (W/m.K) : |
|
|
|
|
| Temp. Range °C |
100 |
200 |
400 |
600 |
| Electrical Resistivity |
0.263 |
0.326 |
0.4575 |
0.646 |
| Thermal Conductivity |
42.6 |
42.2 |
37.7 |
33.0 |
Forging Properties:
En19 steel is forged at 926 to 1205°C.
Stress Relieving:
Annealed: 600-650°c Heat in needed.
Hardened: 500-550°c Heat in needed.