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Grade Introduction:
EN19 steel bright round bar also known as AMERICAN SAE 4140 round bar. EN 19 Bright  Round Bar is a 1% chromium – molybdenum medium hardenability general purpose high tensile steel – generally supplied hardened and tempered in the tensile range of 850 – 1000 Mpa (condition T). All our 4140 Alloy Steel Bar supplied is Ultrasound and MPI inspected. EN19 bright bar is a high quality alloy steel with tensile strength. It is a high quality medium carbon. EN19 black bar is one steel grade in BS 970-1955 standard, which is specification for wrought steels for mechanical and allied engineering purpose. With a combination of good ductility and shock resistance, EN19 bar and en 19 flat bar is suitable for applications with very high loading such as engine gear boxes. EN19 square bar is a popular material in the automotive sector it is possible to machine the material extremely accurately. EN19 hollow bar material is also in demand by Oil & Gas industry. EN19 steel bar is a prime choice because of its high strength. The EN19 rod equivalent grades are AISI 4140 Rod, DIN 1.7225/42crmo4 Bar.
 
EN19 steel bright round bar is an engineering alloy steel containing chromium and molybdenum. EN19 welding rod comes under the class of low alloy steel. EN19 round bars have high fatigue strength, abrasion and impact resistance, toughness, and torsional strength. EN19 black bars can be heat treated in a number of ways to give it a combination of properties. Oil Quenched & Tempered Hardness is 28-34 HRc.  EN19 bright bar Annealing delivery hardness is less than 250HB. En19 round bar has high tensile strength of 850- 1000 Mpa. 
 
Grade Application:
  • Utilized when higher than carbon steel mechanical properties are required
  • Commonly used for axles, drive shafts, crankshaft connecting rods, high tensile bolts, studs, propeller shaft joints, rifle barrels, and induction hardened pins
  • Bolt specification: 9.8 (in condition “T”)
  • Bolt specification: 10.9 (in condition “U”)
  • Gears
  • Pinions
  • Shafts
  • Spindles
  • Oil & Gas Industries
 
Equivalent grades:
Internal Standard
BS
Din
IS
EN
Sae/Aisi
EN19
709M40
42CrMo2
40Cr4Mo3
En19
4140
 
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, 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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Price List: 
 
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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
 
Mechanical Properties:
 
Hardness: 
 
Heat treatment: 
 
Hardening:
Oil quench from a temperature of 85°C/88°C Celsius.
 
Tempering:
 
Physical Properties:
 
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: 
Forge within the temperature range of 125°C/90°C Celsius.
 
Stress Reliving: 
 
Normalizing: 
 
Annealing: 
Anneal at a temperature of 85°C Celsius and cool steadily.
 
Density: 
 
Machinability: 
 
Welding: 
 
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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