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.

Grade Application

EN19 Alloy steel was originally introduced for use in the machine tool and motor industries for gears, pinions, shafts, spindles, and the like. Later its applications became much more extended and it is now widely used in areas such as the oil and gas industries. EN19 is suitable for applications such as gears, bolts, studs, and a wide variety of applications where a good quality high tensile steel grade is suited.

Equivalent Grades

Internal Standard
BS
Din
IS
Sae/Aisi
EN19
709M40
42CrMo2
40Cr4Mo3
4140

Our Supply Range

We supply to automotive ancillaries and OEM customers. The products we manufacture are used as input for manufacturing of automotive and general engineering components. These components are further assembled into systems fitted in automobiles and other engineering applications.

Product Type Size Range
Forged Round Bars 140mm Dia to 850mm
Rolled Round Bars 16mm Dia and above
Forged Flat Bars Thickness: 32mm to 510mm, Width: 65mm to 1050mm
Rolled Flat Bars Thickness: 6mm to 110mm, Width: 25mm to 510mm

Chemical Composition

The following table shows the chemical composition of En19 steel:

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

Heat Treatment

Steel is heated at 845°C followed by quenching in oil. Before hardening, it can be normalized by heating at 913°C for a long period of time followed by air cooling.

Hardness

Properties
Metric
Imperial
Hardness, Brinell
197
197

Hardening

En19 alloy steel can be hardened by cold working or heating and quenching.

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.

Welding

EN19 steel can be welded using all conventional techniques. However, the mechanical properties of this steel will be affected if it is welded in the heat-treated condition, and post weld heat treatment should be performed.

Machinability

EN19 alloy steel has good machinability in the annealed condition.

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
Elongation at break (in 50 mm)
25.70%
25.70%
Hardness, Brinell
197
197
Hardness, Knoop (converted from Brinell hardness)
219
219
Hardness, Rockwell B (converted from Brinell hardness)
92
92
Hardness, Rockwell C (converted from Brinell hardness. Value below normal HRC range, for comparison purposes only)
13
13
Hardness, Vickers (converted from Brinell hardness)
207
207
Machinability (based on AISI 1212 as 100 machinability)
65
65

Physical Properties

DENSITY (G/CM 3)
8.08
DENSITY (LB/IN 3)
0.292
MELTING POINT (°C)
1425
MELTING POINT (°F)
2600

Tempering

En19 alloy steel can be tempered at 205 to 649°C depending upon the desired hardness level. The hardness of the steel can be increased if it has a lower tempering temperature. For example, a tensile strength of 225 ksi can be achieved by tempering at 316°C (600°F), and tensile strength of 130 ksi can be achieved by tempering at 538°C(1000°F).

Normalizing

Heat 870°C – 900°C and cool in still air.

Annealing

EN19 steel is annealed at 872°C followed by slowly cooling in the furnace.

Density

The density of EN19 Alloy steel material: 7.85kg/cm3

Supply Cities

Ambattur, Bangalore, Chennai, Coimbatore, Dindigul, Guindy, Madurai, Nellore, Hyderabad, Tirupur, Tuticorin, Madurai, Andhra Pradesh, Karnataka, Puducherry, Kerala, Kanyakumari, Telangana, Salem, Thanjavur, Trichy, Erode, Vellore, Karur, Nagercoil, Kanchipuram, Karaikudi, Pudukottai, Nagapattinam.

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Addition to other grades

MS, EN1A, EN3B, EN8, EN8D, EN9, EN19, EN24, EN31, EN32B, EN36C, EN41B, EN43B, EN47, EN353, IS2062, 42Crmo4, HCHCR, D2, D3, H-11, H-13, CW-1, OHNS, M2, M35, M42, DIN1.2714, P20, P20+S, P20+Ni, SCM420, ASTMSA-36, ASTMSA-105, SAE1018, SAE4140, SAE8620, 16MNCR5, 20MNCR5, C20, C45, C50, C60, CK45, 20C8, 40C8, 45C8, 55C8, C55MN75, SAE52100, S40C, S355J2G3.