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.
Equivalent Grades
| Standards | Designation |
| ASTM | A510 |
Grade Application
EN43B is used commonly for many general engineering applications. Typical applications include springs, shafts, bushes, crankshafts, screws, sickles, axes, knives, woodworking drills, and hammers.
Our Supply Range
We supply to automotive ancillaries and OEM customers. The products we manufacture are used as input for manufacturing of automotive and general engineering components. These components are further assembled into systems fitted in automobiles and other engineering applications.
| Product Type | Size Range |
|---|---|
| Forged Round Bars | 140mm Dia to 850mm |
| Rolled Round Bars | 16mm Dia and above |
| Forged Flat Bars | Thickness: 32mm to 510mm, Width: 65mm to 1050mm |
| Rolled Flat Bars | Thickness: 6mm to 110mm, Width: 25mm to 510mm |
Chemical Composition
The following table shows the chemical composition of EN43B steel:
| 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 |
Heat Treatment
Heat treatment temperatures, including the rate of heating, cooling, and soaking times, etc. will vary due to factors such as the shape and size of each steel component. Other considerations during the heat treatment process include the type of furnace, quenching medium, and workpiece transfer facilities.
Hardening
Temper the EN43B spring steel component immediately after quenching whilst tools still hand warm. Re-heat to the tempering temperature then soak for one hour per 25 millimeters of a total thickness (2 hours minimum) Cool the steel in the air. For most applications tempering will be between 550-660°C.
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.
Physical Properties
| Physical Properties | Metric | Imperial |
| Density | 7.85 g/cm3 | 0.284 lb/in3 |
Annealing
Heat the steel slowly to 680-710°C, soak well. Cool slowly in the furnace.
Density
| Physical Properties | Metric | Imperial |
| Density | 7.85 g/cm3 | 0.284 lb/in3 |
Supply Cities
Ambattur, Bangalore, Chennai, Coimbatore, Dindigul, Guindy, Madurai, Nellore, Hyderabad, Tirupur, Tuticorin, Madurai, Andhra Pradesh, Karnataka, Puducherry, Kerala, Kanyakumari, Telangana, Salem, Thanjavur, Trichy, Erode, Vellore, Karur, Nagercoil, Kanchipuram, Karaikudi, Pudukottai, Nagapattinam.
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Addition to other grades
MS, EN1A, EN3B, EN8, EN8D, EN9, EN19, EN24, EN31, EN32B, EN36C, EN41B, EN43B, EN47, EN353, IS2062, 42Crmo4, HCHCR, D2, D3, H-11, H-13, CW-1, OHNS, M2, M35, M42, DIN1.2714, P20, P20+S, P20+Ni, SCM420, ASTMSA-36, ASTMSA-105, SAE1018, SAE4140, SAE8620, 16MNCR5, 20MNCR5, C20, C45, C50, C60, CK45, 20C8, 40C8, 45C8, 55C8, C55MN75, SAE52100, S40C, S355J2G3.
