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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 Steel.
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.
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:
|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|
|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|
|Elongation at break (in 50 mm)||25.70%||25.70%|
|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|
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 quenching.
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)||8.08|
|DENSITY (LB/IN 3)||0.292|
|MELTING POINT (°C)||1425|
|MELTING POINT (°F)||2600|
|Average Coefficient of Linear Thermal Expansion (μm/m.K)|
|Temp. Range °C||20-100||20-200||20-400||20-600|
|Electrical Resistivity ( μΩ.m) and Thermal Conductivity (W/m.K)|
|Temp. Range °C||100||200||400||600|