EN43B

EN43B Grade Overview

EN43B is a high-quality carbon spring steel, ideal for a wide range of engineering applications. It is available in various forms including round bars, hexagons, flats, and as spring steel plates and sheets. EN43B steel can be flame cut or guillotine cut to custom specifications, with normalizing recommended to enhance its properties. This versatile spring steel, when hardened and tempered, exhibits excellent spring characteristics, making it suitable for a range of applications.

Applications of EN43B – BRIGHT BAR:

• Springs
• Shafts
• Bushes
• Crankshafts
• Screws
• Sickles
• Axes
• Knives
• Woodworking Drills
• Hammers

Equivalent Grades for EN43B – BRIGHT BAR:

• ASTM: A510

Additional Grades:

MS, EN1A, EN3B, EN8, EN8D, EN9, EN19, EN24, EN31, EN32B, EN36C, EN41B, EN47, EN353, IS2062, 42Crmo4, OHNS, HCHCR, D2, D3, H-11, H-13, CW-1, 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.

Supply Range and Pricing:

For detailed information on our supply range and pricing, please contact us directly.

EN43B – BRIGHT BAR Chemical Composition:

• Carbon (C): 0.45 – 0.50%
• Silicon (Si): 0.07 – 0.35%
• Manganese (Mn): 0.70 – 1.00%
• Sulfur (S): ≤ 0.05%
• Phosphorus (P): ≤ 0.05%
• Chromium (Cr): Not specified
• Nickel (Ni): Not specified
• Copper (Cu): Not specified

EN43B – BRIGHT BAR Mechanical Properties:

• Tensile Strength: ≥ 380 MPa
• Yield Strength: ≥ 210 MPa
• Elongation (in 100-150 mm): ≥ 25%
• Reduction in Area: ≥ 50%
• Hardness: ≤ 111 HB

EN43B – BRIGHT BAR Hardness:

• Annealing: Max 111 HB
• Quenching and Tempering: Typically tempered between 550 – 660°C

EN43B – BRIGHT BAR Heat Treatment:

Heat treatment parameters such as temperature, heating rate, cooling, and soaking times will vary depending on the shape and size of the component. The choice of furnace and quenching medium also impacts the heat treatment process.

EN43B – BRIGHT BAR Hardening:

• Temperature: 840 – 870°C
• Quenching Medium: Oil

EN43B – BRIGHT BAR Tempering:

• Temper Immediately: After quenching, temper the steel while it is still hand warm.
• Reheat and Soak: Reheat to the tempering temperature and soak for one hour per 25 mm of thickness (minimum two hours). Cool in air.
• Typical Tempering Range: 550 – 660°C

EN43B – BRIGHT BAR Physical Properties:

• Density: 7.85 g/cm³ (0.284 lb/in³)

EN43B – BRIGHT BAR Thermal Properties:

• Annealing Temperature: 680 – 710°C; cool slowly in the furnace.

EN43B – BRIGHT BAR Forging Properties:

• Preheat: Carefully, then raise temperature to 1100°C for forging.
• Avoid Forging Below: 850°C
• Post-Forging Cooling: Cool slowly, preferably in a furnace.

EN43B – BRIGHT BAR Stress Relieving:

• Procedure: Stress relieve after heavy machining by heating to 600 – 650°C, soaking for about two hours per 25 mm of section, then cool in air.

EN43B – BRIGHT BAR Normalizing:

• Note: Normalizing is not typically required for this steel due to its air-hardening ability.

EN43B – BRIGHT BAR Annealing:

• Temperature: 680 – 710°C; soak well and cool slowly in the furnace.

EN43B – BRIGHT BAR Machinability:

• Rating: EN43B offers good machinability for a variety of engineering applications.

EN43B – BRIGHT BAR Welding:

• Guidelines: Welding of EN43B should follow standard procedures, with stress tempering recommended for pre-hardened conditions.