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Steel Flat Bar 1.0503 / C45 / Ст45 Steel flat bar 1.0503 (C45 / Ст45) is a medium-hard carbon structural steel known for its high strength, good machinability, and moderate wear resistance. It is widely used in mechanical engineering, construction, and metalworking industries. Technical Specifications Parameter Value Steel Grade 1.0503 / C45 / Ст45 Standard […]
Steel flat bar 1.0503 (C45 / Ст45) is a medium-hard carbon structural steel known for its high strength, good machinability, and moderate wear resistance. It is widely used in mechanical engineering, construction, and metalworking industries.
| Parameter | Value |
|---|---|
| Steel Grade | 1.0503 / C45 / Ст45 |
| Standard | EN 10083-2, DIN 17200, GOST 1050-88 |
| Tensile Strength, MPa | 600-800 |
| Yield Strength, MPa | ≥ 355 |
| Hardness (HB) after Heat Treatment | 170-210 |
| Operating Temperature Range, °C | -40 to +400 |
| Element | C | Si | Mn | P | S |
|---|---|---|---|---|---|
| Content | 0.42-0.50 | 0.10-0.40 | 0.50-0.80 | ≤ 0.025 | ≤ 0.025 |
| Property | Value |
|---|---|
| Impact Toughness, J/cm² (at 20°C) | ≥ 35 |
| Elongation, % | ≥ 14 |
| Elastic Modulus, GPa | 210 |
✅ High strength and hardness
✅ Good machinability (cutting, milling, drilling)
✅ Capability for hardening and tempering
✅ High resistance to impact loads
Steel flat bar 1.0503 (C45 / Ст45) is an optimal choice for components requiring increased strength and wear resistance under moderate temperatures.
Steel strip delivery form 1.0503 / st45
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Steel circles |
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| Steel grades | Dimensions supplied (mm) |
| Steel strip 1.0503 / st45 | 20-90 : 205-605 |
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