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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
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
Addition to other grades:
MS, EN1A, EN3B, EN8, EN8D, EN9, EN24, EN31, EN32B, EN36C, EN41B,
EN43B, EN47, EN353, IS2062, 42Crmo4, HCHCR, OHNS, D2, D3, H-11, H-13,
CW-1, M2, M35, M42, 2714, SKD-11, P20, P20+S, P20+Ni, SCM 420, ASTM
SA-36, ASTM SA-105, SAE 1018, SAE 1020, SAE 4140, SAE 8620, 16MNCR5,
20MNCR5, C20, C35, C40, C45, C50, C60, CK45, 20C8, 40C8, 45C8, 55C8,
C55MN75, SAE 52100, S40C, S355J2G3.
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The following table shows the chemical composition of En19 steel:
|Bulk modulus (typical for steel)
|Shear modulus (typical for steel)
|Elongation at break (in 50 mm)
|Hardness, Knoop (converted from Brinell hardness)
|Hardness, Rockwell B (converted from Brinell hardness)
Hardness, Rockwell C (converted from Brinell hardness. Value below
normal HRC range, for comparison purposes only)
|Hardness, Vickers (converted from Brinell hardness)
|Machinability (based on AISI 1212 as 100 machinability)
Heat Treatment Properties:
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.
En19 alloy steel can be hardened by cold working or heating and
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).
|DENSITY (G/CM 3)
|DENSITY (LB/IN 3)
|MELTING POINT (°C)
|MELTING POINT (°F)
Average Coefficient of Linear Thermal Expansion (μm/m.K)
|Temp. Range °C
Electrical Resistivity ( μΩ.m) and Thermal Conductivity (W/m.K)
|Temp. Range °C
En19 steel is forged at 926 to 1205°C.
Annealed: 600-650°c Heat in needed.
Hardened: 500-550°c Heat in needed.
Heat 870°C – 900°C and cool in still air.
EN19 steel is annealed at 872°C followed by slowly cooling in the
The density of EN19 Alloy steel material: 7.85kg/cm3
EN19 alloy steel has good machinability in the annealed condition.
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.
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