EN8 Chemical Composition

Understanding the chemical composition of EN8 is essential because it directly impacts its characteristics, such as strength, hardness, toughness, and weldability. The balance of elements within its composition determines these critical properties, making it a vital consideration for manufacturers and engineers alike.

Table of Contents

  • EN8 Chemical Composition
  • EN8 Steel Mechanical Properties
  • EN8 Material Equivalent
  • Hardness of 080M40 Steel
  • Comparison: EN8 vs EN9 Steel
  • Forging Properties of EN8 Carbon Steel
  • Heat Treatment of EN8 Steel
  • Product Range of EN8 Steel
  • Thermal Properties of DIN 1.0511
  • Annealing Process of 080M40 Steel
  • Surface Finish & Tolerance of C45 Steel
  • Surface Hardness of S45C Steel
  • Testing Methods for 1045 Steel

EN8 Chemical Composition

Carbon
0.36-0.44%
Silicon
0.10-0.40%
Manganese
0.60-1.00%
Sulfur
0.050 Max
Phosphorus
0.05 Max
Iron
97.75 to 98.05

Equivalent Grades and Mechanical Properties of 080M40 Steel

The mechanical properties of EN8 are crucial as they define its sturdiness, tensile strength, and longevity. Key attributes like yield strength, tensile strength, and impact strength determine its performance under various conditions. These factors help manufacturers and engineers select the most suitable material for specific applications.

Material equivalents provide a global standardization of names, offering clarity across regions.

EN8 Steel Mechanical Properties

Heat Treatment Yield Strength Rm Tensile Strength Rm Rp 0.2 Impact
Izod Ft.lb KCV J
MPa MPa MPa
N 280 550 – 15 16
245 510 – – –
Q 385 625/775 355 25 28
R 465 700/850 450 25 28

EN8 Material Equivalent

Country British USA Australia Japan
Standard EN 10083-2 ASTM A29 AS 1442 JIS G4051
Grades C45/1.1191 1045 1045 S45C

1045 Steel is Readily Machinable, Refer to DIN 1.0511 Hardness

The composition of 1045 steel provides excellent hardness and machinability. This highlights the ability of 080M40 steel to control hardness through various heat treatment processes. This adaptability allows manufacturers and fabricators to tailor its properties for specific application needs, enhancing performance and durability.

080M40 Steel Hardness

Heat Treatment Hardness
HB
Normalizing 152/207
146/197
Quenching 179/229
Tempering 201/255

EN8 vs EN9 Steel

Properties EN8 EN9
Carbon Content 0.36-0.44% 0.50-0.60%
Hardness Up to 207 HBW Up to 255 HBW
Tensile Strength ≥540 MPa ≥695 MPa

Forging Properties of Carbon Steel Grade EN8

Forging or Hot Rolling 1100 – 850°C

Carbon Content of S45C Steel is Between 0.36-0.44%, View EN8 Grade Heat Treatment

Please adjust the percentage of carbon accordingly.

Heat treatment is essential for achieving desired mechanical properties. Below are the typical heat treatment processes:

  • Soft annealing is performed on hardened steel to soften it.
  • Normalizing refines grain structure and enhances machinability.
  • Hardening increases the hardness of the material's surface.
  • Tempering reduces brittleness after hardening, improving toughness and ductility.

Heat Treatment of EN8 Carbon Steel

Soft Annealing 680 – 710°C/furnace
Normalizing 840 – 880°C/air
Hardening 820 – 860°C/water, oil
Tempering 550 – 660°C/air

Available Product Range of EN8 Steel

EN8 Steel Plate and Sheet
Strips Thickness: 0.4mm to 4mm
Sheets (Cold Rolled) Thickness: 0.4mm to 4mm
Sheets (Hot Rolled) Thickness: 2.7mm to 12mm
Plates 16mm to 150mm
Heavy Plates 16mm to 350mm
1045 Steel Round Bar
Rolled Round Bar Diameter: 16mm to 250mm
Heavy Forged Round Diameter: 200mm to 450mm
Heavy Machined Round Diameter: 260mm to 620mm
Heavy Ship Shafts Diameter: 450mm to 1000mm
S45C Flat Bar
Rolled Flat Bar Thickness: up to 50mm
Width: up to 455mm
Forged Flat Bar Thickness: up to 305mm
Width: up to 455mm
EN8 Material is Ideal for Industrial Applications, Check Thermal Properties of 080M40 Steel

This material is well-suited for industrial use due to its excellent strength, machinability, and durability. Additionally, its favorable thermal properties enhance its versatility in applications requiring precise material specifications. It performs exceptionally well under varying thermal conditions in industrial environments.

Thermal Properties of DIN 1.0511

Thermal Conductivity Thermal Coefficient
37.5 W/m K 6.5e-6 W/m K.

Annealing Process of 080M40 Grade Steel

Annealing 680-710°C

Surface Finish & Tolerance of C45 Steel

Surface Finish Turned Black-Rolled Polished Grinding Cold Drawn Black-Forged Peeled
Tolerance (0, +3mm) (0, +1mm) Best h11 Best h9 Best H11 (0, +5mm) Best H11
C45 Steel Can Be Used in High-Temperature Conditions, Refer to EN8 Grade Steel Surface Finish

Surface finish and tolerance are critical parameters determining the suitability of a material for different applications. Manufacturers rely on these parameters to make informed decisions for their projects. Proper specifications ensure optimal performance, durability, and longevity of the final products.

Surface Hardness of S45C Steel

Surface Hardness Min. 55 HRC

Testing Methods for 1045 Steel

  • Corrosion Testing
  • Chemical Composition Analysis
  • Tensile Strength Test
  • Ultrasonic Testing
  • Visual Inspection
  • Bend Test

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