EN19 Steel
EN19 Steel Specifications
Material Selection and Specification of EN19 Round Bar
Specification | Details |
---|---|
Standard | BS 970 709M40, AISI 4140, DIN 42CrMo4 |
Grade | EN19 |
Hex Bar Size | 2-100mm A/F |
Flat Bar Size | Thickness: 2 -100mm, Width: 10 to 500mm |
Round Bar Size | Diameter: 3-~800mm |
Square Bar Size | 4 to 100mm |
Rectangle Size | 33 x 30mm to 295 x 1066mm |
Billet Size | 1/2″ to 495mm Diameter |
Surface | Sand Blasting Finished, Bright, Hot Rolled Pickled, Cold Drawn, Polished, Hairline |
Finish | Polish, Grinding, Centreless Ground, Black, Bright, Cold Drawn, Peeled, Slit Rolled Edge, Hot Rolled, Hot Rolled Annealed, Rough Turned |
Tolerance | H9, H10, H11, H12, H13, K9, K10, K11, H8, K12 or as per client requirements |
Processing | Bar cutting up to 650mm |
Condition | Hardened & Tempered, Annealed |
Technique | Hot Rolled, Cold Drawn, Cold Rolled, Forged Round Bar, Rod |
Compliance | Conforms to NACE MR0175/ISO 15156 |
EN19 Chemical Composition
Element | Composition (%) |
---|---|
Carbon (C) | 0.35 – 0.45 |
Silicon (Si) | 0.15 – 0.30 |
Manganese (Mn) | 0.50 – 0.80 |
Phosphorus (P) | 0.035 max |
Sulfur (S) | 0.040 max |
Chromium (Cr) | 0.90 – 1.50 |
Molybdenum (Mo) | 0.20 – 0.40 |
Iron (Fe) | Balance |
EN19 Mechanical Properties
Property | Value |
---|---|
Tensile Strength | 655 MPa (95,000 psi) |
Yield Strength | 415 MPa (60,200 psi) |
Bulk Modulus | 140 GPa (20300 ksi) |
Shear Modulus | 80 GPa (11600 ksi) |
Elastic Modulus | 190-210 GPa (27557-30458 ksi) |
Poisson’s Ratio | 0.27-0.30 |
Elongation at Break | 25.70% |
Hardness (Brinell) | 197 HB |
Machinability | 65% (based on AISI 1212 as 100%) |
EN19 Heat Treatment
Process | Temperature Range |
---|---|
Normalizing | 870-900°C |
Annealing | 872°C, slowly cooled in the furnace |
Hardening | 845°C, followed by oil quenching |
Tempering | 205-649°C, depending on desired hardness |
EN19 Applications
- Hydraulic fittings and adapters
- Automotive components
- Heavy-duty shafts and spindles
- Transmission gears and crankshafts
- High-strength industrial engineering parts
Key Features & Advantages
- High tensile strength and wear resistance
- Excellent toughness and shock resistance
- Good machinability
- Suitable for heat treatment applications
- Used in demanding mechanical environments
Equivalent Grades
Standard | Equivalent Grade |
---|---|
BS 970 | 709M40 |
AISI | 4140 |
DIN | 42CrMo4 |
IS | 40Cr4Mo3 |
EN | EN19 |
EN19 Machinability & Welding
- Machinability: Good in annealed conditions
- Welding: Requires preheating and post-weld heat treatment
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