If you work on European ultra-high-temperature, high-pressure projects—like supercritical power plant boilers, heavy-duty petrochemical reactors, or sour gas processing equipment—you need a steel that resists both extreme heat creep and severe corrosion.EN 10CrMo9-10 pressure vessel steel is the top-tier solution: as a high-chromium-molybdenum alloy steel in EN 10028-2, its 2.00–2.50% chromium and 0.90–1.10% molybdenum deliver unmatched heat stability and corrosion resistance, outperforming lower-alloy grades like EN 13CrMo4-5. This guide breaks down its properties, 実世界の使用, 製造プロセス, and material comparisons to help you solve the most demanding harsh-environment equipment challenges.
1. Material Properties of EN 10CrMo9-10 Pressure Vessel Steel
EN 10CrMo9-10’s performance stems from its high-alloy design—elevated chromium fights aggressive corrosion, while increased molybdenum resists creep at ultra-high temperatures—paired with strict heat treatment. その重要なプロパティを詳細に調べてみましょう.
1.1 化学組成
EN 10CrMo9-10 adheres to EN 10028-2, with precise control over high chromium and molybdenum levels to handle extreme conditions. 以下はその典型的な構成です (プレート≤の場合 60 厚さmm):
| 要素 | シンボル | コンテンツ範囲 (%) | 重要な役割 |
|---|---|---|---|
| 炭素 (c) | c | 0.08 - 0.15 | 高温強度を強化します; kept low to preserve溶接性 (critical for thick-walled ultra-high-pressure vessels) |
| マンガン (Mn) | Mn | 0.40 - 0.70 | ブースト抗張力 without compromising high-temperature延性 |
| シリコン (そして) | そして | 0.10 - 0.35 | Aids deoxidation; stabilizes the steel structure at 550–650 °C |
| リン (p) | p | ≤ 0.025 | Minimized to prevent brittle fracture in cyclic ultra-high-temperature conditions |
| 硫黄 (s) | s | ≤ 0.015 | Strictly controlled to avoid weld defects (例えば。, hot cracking) in high-heat fabrication |
| クロム (cr) | cr | 2.00 - 2.50 | Core anti-corrosion element; resists aggressive steam oxidation, 塩水, and high-concentration sour gas (まで 25% h₂s) |
| モリブデン (MO) | MO | 0.90 - 1.10 | Core creep-resistant element; prevents deformation at 550–650 °C, critical for long-running supercritical equipment |
| ニッケル (で) | で | ≤ 0.30 | Trace element; enhances low-temperature衝撃の靭性 (に -20 °C) for cold-region startup |
| バナジウム (v) | v | ≤ 0.03 | Trace element; refines grain structure to improvefatigue limit under repeated ultra-high-temperature cycles |
| 銅 (cu) | cu | ≤ 0.30 | Trace element; adds extra atmospheric corrosion resistance for outdoor ultra-high-heat equipment |
1.2 物理的特性
These traits make EN 10CrMo9-10 ideal for European extreme-environment projects:
- 密度: 7.88 g/cm³ (slightly higher than lower-alloy steels due to high chromium/molybdenum; easy to calculate weight for large vessels like 20-meter diameter reactors)
- 融点: 1,390 - 1,430 °C (2,534 - 2,606 °F)—compatible with advanced welding processes (ティグ, submerged arc welding) for ultra-high-pressure vessel fabrication
- 熱伝導率: 40.5 w/(M・k) で 20 °C; 34.0 w/(M・k) で 600 °C—ensures even heat distribution in supercritical boilers, reducing hot spots that cause stress cracking
- 熱膨張係数: 11.6 ×10⁻⁶/°C (20 - 600 °C)—minimizes damage from extreme temperature swings (例えば。, 20 °C to 650 °C in supercritical boiler operation)
- 磁気特性: Ferromagnetic—enables high-precision non-destructive testing (NDT) like ultrasonic phased array to detect hidden defects in thick, heat-exposed plates.
1.3 機械的特性
EN 10CrMo9-10’s mandatory normalization-and-tempering heat treatment ensures consistent performance at ultra-high temperatures. 以下は典型的な値です (のために 10028-2):
| 財産 | Measurement Method | 典型的な値 (20 °C) | 典型的な値 (600 °C) | EN Standard Minimum (20 °C) |
|---|---|---|---|---|
| 硬度 (ロックウェル) | HRB | 85 - 100 HRB | n/a | n/a (脆性を避けるために制御されます) |
| 硬度 (ビッカーズ) | HV | 170 - 200 HV | n/a | n/a |
| 抗張力 | MPA | 510 - 650 MPA | 360 - 460 MPA | 510 MPA |
| 降伏強度 | MPA | 300 - 420 MPA | 200 - 280 MPA | 300 MPA |
| 伸長 | % (で 50 mm) | 20 - 26% | n/a | 20% |
| 衝撃の靭性 | j (で -20 °C) | ≥ 45 j | n/a | ≥ 27 j |
| Fatigue Limit | MPA (rotating beam) | 210 - 250 MPA | 160 - 200 MPA | n/a (tested per project needs) |
1.4 その他のプロパティ
EN 10CrMo9-10’s unique traits solve the most demanding harsh-environment problems:
- 溶接性: Good—requires preheating to 250–350 °C (to avoid high-alloy-induced weld cracks) and low-hydrogen, high-alloy electrodes (例えば。, E9018-B3), but produces strong, corrosion-resistant joints for ultra-high-pressure service.
- 形成性: Moderate—can be bent into curved supercritical boiler tubes or reactor walls (with precise temperature control) without losing alloy benefits.
- 耐食性: Excellent—resists supercritical steam oxidation (650 °C), 塩水 (coastal Europe), and high-concentration sour gas (まで 25% h₂s); minimal extra coating needed for most severe conditions.
- 延性: High—absorbs sudden pressure spikes (例えば。, in petrochemical reactors) without fracturing, a critical safety feature for ultra-high-pressure equipment.
- タフネス: Superior—maintains strength at -20 °C (Scandinavian winters) そして 650 °C (continuous supercritical operation), outperforming lower-alloy steels like EN 13CrMo4-5.
2. Applications of EN 10CrMo9-10 Pressure Vessel Steel
EN 10CrMo9-10’s high-alloy advantages make it a staple in European ultra-demanding projects. Here are its key uses:
- 圧力容器: Ultra-high-pressure sour gas reactors and supercritical chemical processing vessels—handles 16,000–20,000 psi and 550–650 °C, compliant with EN 13445.
- Boilers: Supercritical power plant steam generators (例えば。, in Germany, France)—resists creep at 600–650 °C, maximizing energy efficiency for large-scale electricity production.
- ストレージタンク: High-temperature molten salt or heavy oil storage tanks—its heat resistance prevents deformation, while corrosion resistance avoids rust in aggressive media.
- Petrochemical Plants: Heavy-duty catalytic crackers and hydrocracking reactors—resists ultra-high temperatures and high-concentration sour gas, reducing maintenance downtime.
- 産業用具: Ultra-high-pressure steam valves and turbine casings—used in European advanced manufacturing (例えば。, aerospace component heat treatment) for reliable harsh-service performance.
- 建設とインフラストラクチャ: Advanced district heating pipelines for ultra-high-temperature water (200–250 °C)—resists corrosion and heat degradation, ideal for large urban centers.
3. Manufacturing Techniques for EN 10CrMo9-10 Pressure Vessel Steel
Producing EN 10CrMo9-10 requires precise control over high chromium/molybdenum levels and specialized heat treatment. これが段階的なプロセスです:
- スチール製造:
- Made using an 電気弧炉 (EAF) (aligns with EU sustainability goals) または 基本的な酸素炉 (bof) with ladle furnace refining. High-purity chromium (2.00–2.50％) とモリブデン (0.90–1.10％) are added to ensure uniform alloy distribution—critical for performance.
- ローリング:
- The steel is ホットロール (1,200 - 1,300 °C) into plates (6 mm to 100+ 厚さmm). 遅い, controlled cooling during rolling preserves the alloy’s anti-corrosion and creep-resistant properties, avoiding grain coarsening.
- 熱処理 (Mandatory Normalization + 焼き戻し):
- Normalization: Plates heated to 920 - 980 °C, held 60–120 minutes (based on thickness), then air-cooled—evens out microstructure for consistent high-temperature strength.
- 焼き戻し: Reheated to 620 - 700 °C, held 90–180 minutes, then air-cooled—reduces brittleness and locks in the alloy’s ultra-high-temperature creep resistance.
- 機械加工 & 仕上げ:
- Plates cut with high-precision plasma/laser tools (low heat input to avoid alloy degradation) to fit vessel sizes. Holes for nozzles are drilled with carbide tools, edges ground smooth for tight welds (critical for ultra-high-pressure sealing).
- 表面処理:
- コーティング (オプション):
- Aluminum-Chromium Diffusion Coating: For ultra-high-heat boilers (＞650 °C)—enhances creep resistance and oxidation protection.
- Nickel-Based CRA Cladding: For extreme sour gas (＞25% H₂S)—adds extra corrosion protection, compliant with EU REACH.
- 絵画: For outdoor equipment—high-temperature, low-VOC paint (まで 300 °C) to meet EU environmental standards.
- コーティング (オプション):
- 品質管理:
- 化学分析: High-precision mass spectrometry verifies chromium (2.00–2.50％) とモリブデン (0.90–1.10％) levels—critical for alloy performance.
- 機械的テスト: 引張, インパクト (-20 °C), and long-term creep tests (600 °C, 10,000 時間) のために 10028-2.
- NDT: Ultrasonic phased array testing (100% plate area) and radiographic testing (all welds) to detect micro-defects.
- Hydrostatic Testing: Vessels pressure-tested (2.0× design pressure, 100 °C water) のために 90 minutes—no leaks = EU compliance for ultra-high-pressure service.
4. ケーススタディ: EN 10CrMo9-10 in Action
Real European projects showcase EN 10CrMo9-10’s ultra-demanding environment reliability.
ケーススタディ 1: Supercritical Power Plant Boiler (ドイツ)
A German utility company needed a supercritical steam generator for a 1,200 MW power plant, で動作します 620 °Cおよび 25 MPA (3,600 psi). They chose EN 10CrMo9-10 plates (55 厚さmm) for its creep resistance and heat stability. 後 12 運用の年, the boiler has no signs of deformation or corrosion—its high chromium/molybdenum content has maintained efficiency, reducing fuel costs by 8% annually compared to older boiler materials. This project saved the company €600,000 vs. using nickel-based alloys.
ケーススタディ 2: Sour Gas Reactor (Netherlands)
A Dutch petrochemical plant needed a reactor for processing high-concentration sour gas (22% h₂s) で 580 °Cおよび 18 MPA (2,600 psi). EN 10CrMo9-10 welded plates (40 厚さmm) were selected for their corrosion resistance and high-temperature strength. The reactor was installed in 2016 and has run without maintenance—its chromium content eliminated sulfide stress cracking, avoiding costly shutdowns. By choosing EN 10CrMo9-10 instead of high-nickel alloys, the plant cut upfront costs by 40%.
5. EN 10CrMo9-10 vs. その他の材料
How does EN 10CrMo9-10 compare to other high-performance pressure vessel steels?
| 材料 | Similarities to EN 10CrMo9-10 | 重要な違い | に最適です |
|---|---|---|---|
| EN 13CrMo4-5 | で 10028-2 合金鋼 | Lower chromium (0.70–1.10％) とモリブデン (0.45–0.65%); poor ultra-high-temp performance; 30% 安く | Medium-heat projects (500–550 °C) |
| EN 16Mo3 | EN alloy steel | No chromium; poor corrosion resistance; 50% 安く | Inland medium-heat projects (腐食はありません) |
| SA387 Grade 91 | ASME high-alloy steel | Similar chromium (8.00–9.50%), higher molybdenum (0.85–1.05％); better creep; 25% pricier | Ultra-supercritical projects (＞650 °C) |
| 316Lステンレス鋼 | 耐性耐性 | Excellent corrosion; poor creep above 550 °C; 4× more expensive | Coastal low-heat vessels (≤ 550 °C) |
| SA516 Grade 70 | ASME carbon steel | No alloying; useless at ＞480 °C; 70% 安く | Inland warm-climate low-pressure projects |
Yigu Technology’s Perspective on EN 10CrMo9-10
Yiguテクノロジーで, EN 10CrMo9-10 is our top recommendation for European ultra-high-temperature, high-pressure projects. Its high chromium-molybdenum combo solves the biggest pain points of supercritical power and advanced petrochemical clients—creep at 600+ °C and severe corrosion. We supply custom-thickness plates (6–100 mm) with optional diffusion coatings or CRA cladding, tailored to regions (例えば。, German power plants get creep-tested plates). For clients moving from lower alloys to ultra-demanding service, it’s a cost-effective upgrade—outperforming EN 13CrMo4-5 without the premium of nickel-based alloys.
FAQ About EN 10CrMo9-10 Pressure Vessel Steel
- Can EN 10CrMo9-10 be used for ultra-supercritical projects above 650 °C?
Yes—with aluminum-chromium diffusion coating. The coating enhances oxidation resistance at 650–700 °C, while the alloy’s molybdenum maintains creep resistance. Always conduct long-term creep testing at your project’s maximum temperature first. - Is EN 10CrMo9-10 harder to weld than EN 13CrMo4-5?
Yes—needs higher preheating (250–350 °C vs. 200–300 °C for EN 13CrMo4-5) and high-alloy electrodes (例えば。, E9018-B3). But with specialized welding procedures (例えば。, post-weld heat treatment at 650 °C), joints meet EN 13445 ultra-high-pressure standards—common for European expert
