EN43B

EN43B Grade Introduction:

EN43B Carbon spring steel which is supplied in round bar, hexagon, flat, and also as spring steel plate and sheet. The plate can be flame cut to your requirements with normalizing recommended for this spring steel grade. The bar can be cut to your required lengths. Spring steel plate and sheet can be flame cut or guillotine cut to your requirements. Spring steel strip is available in coil, slit and cut to length. Spring steel, as its name suggests, is most commonly used in the manufacture of springs. When hardened and tempered (as supplied, or heat-treated by the customer) it offers excellent spring characteristics.

EN43B Grade Application:

  • springs
  • shafts,
  • bushes
  • crankshafts
  • screws
  • sickles
  • hammers

EN43B Equivalent Grades:

Standards Designation
ASTM A510

EN43B Chemical Composition:

Element C Si Mn S P Cr Ni Cu
Content (%) 0.45-0.50 0.07-0.35 0.7-1.00 ≤0.05 ≤0.05 – – –

Mechanical Properties:

Grade Tensile Strength (MPa) Yield Strength (MPa) Elongation in 100-150 mm (%) Reduction in Area Hardness
En43B ≥380 ≥210 ≥25 ≥50 ≤111HB

Physical Properties:

Metric Metric Imperial
Density 7.85 g/cm³ 0.284 lb/in³

Thermal Properties:

Forging Properties:

Preheat carefully, then raise the temperature to 1100°C for forging. Do not forge below 850°C. After forging cool slowly, preferably in a furnace.

Stress Relieving:

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