Spa H Stahl
SPA-H-Stahl ist ein hochfest, niedriglegierter Baustahl mit:
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Chemische Zusammensetzung optimized for toughness and weldability
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Mechanische Eigenschaften suitable for heavy-duty structural applications
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Häufige Verwendungen in bridges, Schiffe, Industriemaschinen, und Konstruktion
- Beschreibung
SPA-H-Stahl ist ein high-strength structural steel commonly used in construction, Schiffbau, and engineering projects where both toughness and weldability are required. Seine Kombination aus mechanical performance and chemical composition makes it a reliable material for heavy-duty structures.
1. Chemical Composition of SPA-H Steel
| Element | Inhalt (%) | Funktion |
|---|---|---|
| Kohlenstoff (C) | 0.12 – 0.18 | Gibt Kraft |
| Mangan (Mn) | 1.0 – 1.5 | Verbessert Zähigkeit und Härtbarkeit |
| Phosphor (P) | ≤ 0.035 | Kontrolle von Verunreinigungen |
| Schwefel (S) | ≤ 0.035 | Kontrolle von Verunreinigungen |
| Silizium (Und) | ≤ 0.50 | Verbessert die Festigkeit und Oxidationsbeständigkeit |
| Kupfer (Cu) | ≤ 0.25 | Improves corrosion resistance slightly |
| Chrom (Cr), Nickel (In), Mo | ≤ trace | May be present in small amounts for improved properties |
Notiz: SPA-H steel is a niedriglegierter hochfester Baustahl, not stainless steel. Its focus is on mechanical strength rather than corrosion resistance.
2. Wichtige mechanische Eigenschaften
| Eigentum | Typischer Wert |
|---|---|
| Streckgrenze (MPa) | ≥ 355 |
| Zugfestigkeit (MPa) | 470 – 630 |
| Verlängerung (%) | ≥ 20 |
| Schlagzähigkeit | Good at room temperature |
| Härte (HB) | 140 – 190 |
Hauptmerkmale:
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High yield and tensile strength
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Good toughness and ductility
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Weldable for structural fabrication
3. SPA-H Steel Performance Highlights
3.1 Strength and Structural Reliability
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High yield strength supports heavy loads
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Maintains structural integrity under stress
3.2 Schweißbarkeit
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Compatible with common welding methods
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No preheating required in most cases
3.3 Cold Bending and Forming
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Can be rolled or bent for construction components
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Suitable for ship hull plates, bridge segments, und Strukturrahmen
4. Common Applications of SPA-H Steel
| Industrie | Anwendungsbeispiele |
|---|---|
| Konstruktion | Brücken, Gebäude, high-strength structural beams |
| Schiffbau | Rumpfplatten, Decks, offshore platforms |
| Schwere Maschinen | Load-bearing components, crane frames |
| Industrielle Fertigung | Pressure vessels (non-stainless), Lagertanks |
| Maschinenbau | Structural supports, pipelines under moderate stress |
5. Vergleich mit anderen Baustählen
| Grad | Streckgrenze (MPa) | Use Case |
|---|---|---|
| SPA-H | ≥355 | General high-strength structural use |
| SPA-C | ≥315 | Mittelfeste Strukturplatten |
| SPA-D | ≥390 | Higher-strength, specialized construction |
| S355 / S420 (IN) | 355–420 | European equivalent, construction steel |
Beobachtung:
SPA-H wird häufig verwendet in China and Asian markets as a high-strength construction and shipbuilding plate, similar in performance to S355 structural steel.
