JIS G3311 · GB 50# · AISI 1050 · EN C50 / 1.0540
S50C is a medium-carbon steel (0.47-0.55% C) offering a balanced combination of strength, hardness, and ductility. S50C steel strip is the cost-effective workhorse for agricultural tools, general-purpose springs, and machine components where moderate hardness and good machinability are required.
| Element | C | Si | Mn | P (max) | S (max) |
|---|---|---|---|---|---|
| % | 0.47-0.55 | 0.17-0.37 | 0.50-0.80 | 0.035 | 0.035 |
| Condition | Hardness | Tensile Strength |
|---|---|---|
| Annealed | ≤187 HB | ≤680 MPa |
| Hardened & Tempered | 45-50 HRC | 1400-1700 MPa |
Composition, hardness and mechanical-property tables are grade references, not guaranteed supply values. Verify the applicable standard edition, product form, condition and order-specific acceptance criteria.
| Parameter | Range |
|---|---|
| Thickness | State the required value and tolerance; confirm grade-specific feasibility |
| Width | State the required value, tolerance and edge condition |
| Delivery Condition | State the required annealed, hardened-and-tempered or other condition |
| Edge | Slit / Round / Square |
| Standard | JIS G3311, ASTM A682, GB/T 699, EN 10132-2 |
| JIS | GB | ASTM/AISI | EN/DIN |
|---|---|---|---|
| S50C | 50# | 1050 | C50 / 1.0540 |
Sickle blades, hoe blades, cultivator tines. Good edge retention at moderate cost with 45-50 HRC working hardness.
General-purpose flat springs, clamping springs, and return springs. Adequate fatigue life for non-critical spring applications.
Shafts, keys, pins, and wear plates. Good combination of strength and machinability for general engineering components.
65Mn (spring steel) · SK5 (high carbon tool) · 42CrMo (alloy structural)