Spa H Steel
SPA-H鋼 です 高強度, low-alloy structural steel と:
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化学組成 optimized for toughness and weldability
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機械的性質 suitable for heavy-duty structural applications
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Common uses in bridges, ships, 産業機械, and construction
- 説明
SPA-H鋼 です high-strength structural steel commonly used in construction, shipbuilding, and engineering projects where both toughness and weldability are required. その組み合わせは、 mechanical performance and chemical composition makes it a reliable material for heavy-duty structures.
1. Chemical Composition of SPA-H Steel
| 要素 | コンテンツ (%) | 関数 |
|---|---|---|
| 炭素 (C) | 0.12 – 0.18 | 強度を提供します |
| マンガン (ん) | 1.0 – 1.5 | 靭性と焼入性の向上 |
| リン (P) | ≤ 0.035 | 不純物管理 |
| 硫黄 (S) | ≤ 0.035 | 不純物管理 |
| シリコン (そして) | ≤ 0.50 | Enhances strength and oxidation resistance |
| 銅 (銅) | ≤ 0.25 | Improves corrosion resistance slightly |
| クロム (Cr), ニッケル (で), モー | ≤ trace | May be present in small amounts for improved properties |
注記: SPA-H steel is a low-alloy high-strength structural steel, not stainless steel. Its focus is on mechanical strength rather than corrosion resistance.
2. Key Mechanical Properties
| 財産 | 代表値 |
|---|---|
| 降伏強さ (MPa) | ≥ 355 |
| 抗張力 (MPa) | 470 – 630 |
| 伸長 (%) | ≥ 20 |
| 衝撃靱性 | Good at room temperature |
| 硬度 (HB) | 140 – 190 |
主な特長:
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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 溶接性
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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, and structural frames
4. Common Applications of SPA-H Steel
| 業界 | 応用例 |
|---|---|
| 工事 | 橋, 建物, high-strength structural beams |
| Shipbuilding | Hull plates, decks, offshore platforms |
| Heavy Machinery | Load-bearing components, crane frames |
| 工業製造 | Pressure vessels (non-stainless), storage tanks |
| エンジニアリング | Structural supports, pipelines under moderate stress |
5. Comparison with Other Structural Steels
| 学年 | 降伏強さ (MPa) | Use Case |
|---|---|---|
| スパH | ≥355 | General high-strength structural use |
| SPA-C | ≥315 | Medium-strength structural plates |
| SPA-D | ≥390 | Higher-strength, specialized construction |
| S355 / S420 (で) | 355–420 | European equivalent, construction steel |
Observation:
SPA-H is widely used in China and Asian markets as a high-strength construction and shipbuilding plate, similar in performance to S355 structural steel.
