EN24 - ALLOY STEEL - BRIGHT BAR
 

 

EN24 – BRIGHT BAR Grade Introduction:
EN24 steel Bright bar is a very high strength steel alloy which is supplied hardened and tempered. The grade is a nickel chromium molybdenum combination – this offers high tensile steel strength, with good ductility and wear resistance characteristics. With relatively good impact properties at low temperatures, EN24 is also suitable for a variety of elevated temperature applications. EN24 sections larger than 250mm may still be available in the quenched and tempered condition, but it should be noted that a fall-off in mechanical properties may be apparent approaching the center of the bar. It is therefore recommended that larger sizes are supplied in the annealed (softened) condition, and that quenching and tempering is carried out after initial stock removal.  This should achieve better mechanical properties towards the core.
 
EN24 – BRIGHT BAR Grade Application: 
• High strength shafts
• Punches & dies
• Drill bushings
• Retaining rings
• Gears
 
EN24 – BRIGHT BAR Equivalent grades:
BS 970:1955 EN24T
BS 970:1991 817M40T
German / DIN 34CrNiMo6
French AFNOR 35NCD6
American AISI / SAE 4340
German Werkstoff No. 1.6582
European Standard EN10277-5
 
Addition to other grades:
MS, EN1A, EN3B, EN8, EN8D, EN9, EN24, EN31, EN32B, EN36C, EN41B, EN43B, EN47, EN353, IS2062, 42Crmo4, HCHCR, D2, D3, H-11, H-13, CW-1, OHNS M2, M35, M42, DIN-1.2714, P20, P20+S, P20+Ni, SCM420, ASTMSA-36, ASTM SA-105 , SAE1018, SAE1010, SAE4140, SAE8620, 16MNCR5, 20MNCR5, C20, C45, C50, C60, CK45, 20C8, 40C8, 45C8, 55C8, C55MN75, SAE52100, S40C, S355J2G3
 
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Price List:
EN24 - ALLOY STEEL - BRIGHT BAR
 
 
EN24 – BRIGHT BAR Chemical composition:
The following table shows the chemical composition of EN24 steel:
Element
 
C
 
Si
 
Mn
 
P
 
S
 
Cr
 
Mo
 
Ni
 
Content (%)
 
0.36-0.44
 
0.10-0.35
 
0.45-0.70
 
0.035 Max
 
0.040 Max
 
1.00-1.40
 
0.20-0.35
 
1.30-1.70
 
 
EN24 Mechanical Properties:
Condition
 
Tensile
N/mm²
 
Yield
N/mm²
 
Elongation
%
 
Izod
KCV J
 
Hardness
Brinell
 
T
 
850-1000
 
650
 
13
 
35
 
248-302
 
U
 
925-1000
 
755
 
12
 
42
 
269-331
 
V
 
1000-1150
 
850
 
12
 
42
 
293-352
 
W
 
1075-1225
 
940
 
11
 
35
 
311-375
 
X
 
1150-1300
 
1020
 
10
 
28
 
341-401
 
Y
 
1225-1375
 
1095
 
10
 
21
 
363-429
 
Z
 
1550
 
1235
 
5
 
9
 
444
 
 
EN24 – BRIGHT BAR Hardness:
248 – 302
 
EN24 – BRIGHT BAR 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 alloy steel.
 
EN24 – BRIGHT BAR Hardening:
EN24 is supplied  ready heat treated. If further heat treatment is required annealed EN24 should be heated slowly to 830-850°C and after adequate soaking at this temperature quench in oil. Temper as soon as tools reach room temperature. Hardening from a neutral salt bath, will reduce the possibility of scaling or decarburization. Heat to 830-850°C and after equalization quench in oil.
 
EN24 – BRIGHT BAR Tempering:
Heat carefully to a suitable temperature selected by reference to the tempering chart or table, soak at the temperature for 2 hours per 25mm of ruling section, then all to cool in the air. Tempering between 250-375°C is not advised as tempering within this range will seriously reduce the impact value. The tempering temperature is dependent on the required mechanical properties, the steel can achieve EN24U, EN24V, EN24W, EN24Y & EN24Z.
 
EN24 – BRIGHT BAR Physical Properties:
Thermal conductivity at °C
 
W/(m*k)
 
40.5
 
20
 
32.5
 
350
 
25.5
 
700
 
 
EN24 Thermal Properties:
Thermal conductivity – 41.9 W/m-°C
 
EN24  Forging Properties:
Preheat carefully, then raise temperature to 1000-1100°C for forging. Do not forge the steel below 850-1100°C. After forging cool slowly preferably in a furnace.
 
EN24 – BRIGHT BAR Stress Reliving:
When parts are heavily machined, ground or otherwise subject to cold work, stress relieving will be beneficial prior to hardening. Heat carefully to 650-670°C, soak well before cooling in the furnace or in the air.
 
EN24 – BRIGHT BAR Normalizing:
1.Nominal normalizing temperature:840-900°C.
2.Hold the temperature for several hours.
3.Cooling in the air.
 
EN24 – BRIGHT BAR Annealing:
Heat slowly to 840-860°C, soak well and allow to cool with the furnace to 580°C, before withdrawing.
 
EN24 – BRIGHT BAR Density:
Density – 7840 kg/m3
 
Supply Cities:
Ahmedabad, Amaravathi, Ambattur, Bangalore, Belgaum, Chennai, Chittoor, Coimbatore, Dindigul, Mysore, Nellore, Hyderabad, Kochi, Mangalore, Tirupur, Tuticorin, Madurai, Andhra Pradesh, Karnataka, Puducherry, Kerala, Tamil Nadu, Telangana, Salem, Thanjavur, Trichy, Erode, Vellore, Ranipet, Sivakasi, Karur, Hosur, Nagercoil, Kanchipuram, Karaikudi, Neyveli, Cuddalore, Kumbakonam, Thiruvannamalai, Pollachi, Rajapalayam, Gudiyatham, Pudukottai, Vaniyambadi, Ambur, Nagapattinam, Trivandrum, Vijayawada, Guntur, Thirupathi, Nazarathpet, Kakinada, Kurnool, Kadapa, Nizamabad, Mahabubnagar, Karimnagar.

 

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