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Alloy Steel EN 19

EN19 is a high quality, high tensile steel usually supplied readily machine able in ‘T’ condition, giving good ductility and shock resisting properties combined with resistance to wear.

Chemical Composition
ElementMinMax
Carbon, C0.350.45%
Manganese, Mn0.500.80%
Silicon, Si0.100.35%
Nickel, Ni-.–-.–
Molybdenum, Mo0.200.40%
Chromium,Cr0.901.50%
Sulfur, S-.–0.05
Phosphorous, P-.–0.05
Mechanical Properties
Heat TreatmentTensile Strength Rm N/mm²Yield Stress Re N/mm²a% on 5.665ÖSoImpact Izod JImpact KCV JProof Stress rp0.2Hardness HBSize mm
R700/85049515342828480201/225>100≤250
S775/925555132722540223/277>150≤250
S775/925585155450570223/277>63≤150
T850/1000680135450655248/302>29≤100
U925/1075755124742740269/331>13≤63
V1000/1150850124742835293/352>6≤29
W1075/1225940124035925311/375>6≤19
Applications

EN19T was originally introduced for the 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. EN19T 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

Forging

Pre heat carefully, then raise temperature to 850-1200°C for forging. Do not forge below 850°C. After forging cool slowly in still air.

Annealing

Heat the EN19T slowly to 680-700°C. Cool in air.

Hardening

This steel grade is commonly supplied ready heat treated. If further heat treatment is required annealed EN19 should be heated slowly to 860-890°C and after adequate soaking at this temperature quench in oil. Temper as soon as tools reach room temperature.

Tempering

Heat carefully to a suitable temperature selected by reference to a tempering chart or table. Soak at the temperature for 2 hours per 25mm of ruling section, then allow to cool in air. Tempering between 250-375°C is not advised as tempering within this range will reduce the impact value.

Heat Treatment

Heat treatment temperatures, including rate of heating, cooling and soaking times will vary due to factors such as the shape and size of each steel component. Other considerations during the heat treatment process include the type of furnace, quenching medium and work piece transfer facilities. Please consult your heat treatment provider for full guidance on heat treatment of EN19T alloy steel.