特殊鋼 8620/1.6523/20CrNiMoA/SNCM220 合金鋼

目次

概要

特殊鋼 8620/1.6523/20CrNiMoA/SNCM220 合金鋼 is a highly versatile and widely used steel variant, known for its excellent properties in terms of hardenability, strength, and toughness. This alloy steel is particularly suitable for applications requiring high wear resistance and fatigue strength. It’s a low-carbon, low-alloy steel containing nickel, chromium, and molybdenum as its primary alloying elements. In this article, we will delve deep into the specifics of this special steel, covering its chemical composition, properties, applications, specifications, suppliers, and more. Let’s embark on this detailed exploration.

Chemical Composition of Special Steel 8620/1.6523/20CrNiMoA/SNCM220 Alloy Steel

Understanding the chemical composition of this alloy steel is crucial as it directly influences its mechanical properties and suitability for various applications.

元素コンテンツ(%)
炭素 (C)0.18 – 0.23
ケイ素 (Si)0.15 – 0.35
マンガン (Mm)0.70 – 0.90
リン (P)≤ 0.035
硫黄 (S)≤ 0.035
クロミウム (Cr)0.40 – 0.60
ニッケル(Ni)0.40 – 0.70
モリブデン (Mo)0.15 – 0.25
特殊鋼 8620/1.6523/20CrNiMoA/SNCM220 合金鋼

の特性と特徴 特殊鋼 8620/1.6523/20CrNiMoA/SNCM220 合金鋼

This alloy steel’s properties make it highly desirable for various demanding applications.

プロパティ説明
硬化性Good, can be carburized
タフネスHigh, even at low temperatures
摩耗抵抗性Excellent, due to its hard surface layer after heat treatment
疲労強度Superior, suitable for cyclic loading applications
機械加工性Good, easy to machine in both annealed and hardened conditions
溶接性Fair, can be welded with proper precautions

Mechanical Properties of Special Steel 8620/1.6523/20CrNiMoA/SNCM220 Alloy Steel

プロパティ価値
引っ張り強度800 – 1100 MPa
降伏強度400 – 650 MPa
伸び12 – 18%
硬度(HRC)28 – 34
Impact StrengthHigh, suitable for high-stress applications

Applications of Special Steel 8620/1.6523/20CrNiMoA/SNCM220 Alloy Steel

The versatility of this steel makes it suitable for a broad range of applications.

申し込み詳細
自動車部品Used in gears, crankshafts, and connecting rods due to high fatigue strength
産業用機器Ideal for manufacturing machine parts that require high wear resistance
航空宇宙Suitable for producing components that must withstand high stress and temperature
ツーリングUsed in the production of dies and molds due to its good machinability and hardness
石油・ガス産業Employed in drill collars and other downhole tools due to its toughness and wear resistance

仕様 特殊鋼 8620/1.6523/20CrNiMoA/SNCM220 合金鋼

仕様詳細
スタンダードASTM A29, ASTM A322, JIS G4053
グレード8620, 1.6523, 20CrNiMoA, SNCM220
サイズAvailable in rounds, squares, flats, and hexagonal bars
熱処理Can be annealed, normalized, or carburized

Standards and Grades

スタンダードグレード
ASTM8620
DIN1.6523
日本工業規格SNCM220
GB20CrNiMoA

Suppliers and Pricing of Special Steel 8620/1.6523/20CrNiMoA/SNCM220 Alloy Steel

Finding reliable suppliers and understanding pricing is essential for procurement.

サプライヤー所在地価格の範囲 (kg あたり)
ABCスチールアメリカ$2.00 – $2.50
XYZ Metals Ltdドイツ€1.80 – €2.20
Shanghai Steel中国¥15 – ¥20
グローバル合金英国£1.50 – £2.00
特殊鋼 8620/1.6523/20CrNiMoA/SNCM220 合金鋼

Advantages and Limitations of Special Steel 8620/1.6523/20CrNiMoA/SNCM220 Alloy Steel

利点

  • 汎用性がある: Suitable for a wide range of applications.
  • 高い強度とタフネス: Makes it ideal for demanding applications.
  • Good Wear Resistance: Extends the life of components.
  • 優れた硬化性: Ensures a hard surface layer post heat treatment.

制限事項

  • コストだ: More expensive than some other steels due to its alloying elements.
  • 溶接性: Requires careful welding practices to avoid cracking.
  • 空室状況 May not be readily available in all regions, leading to longer lead times.

他の合金鋼との比較

特徴8620/1.6523/20CrNiMoA/SNCM22041404340
硬化性良い非常に良い優れている
摩耗抵抗性優れている良い非常に良い
タフネスモデレート
コスト高いモデレート高い
機械加工性良い良いモデレート

Heat Treatment of Special Steel 8620/1.6523/20CrNiMoA/SNCM220 Alloy Steel

Heat treatment is a critical process that enhances the mechanical properties of this alloy steel.

Carburizing Process

  • Objective: To increase surface hardness while maintaining a tough core.
  • Procedure:
  1. Heating: Heat the steel to 900-950°C.
  2. 浸炭: Maintain at this temperature in a carbon-rich environment.
  3. 焼き入れ: Rapid cooling in oil or water to harden the surface.
  4. 焼き戻し: Reheating to 150-200°C to reduce brittleness.

Annealing Process

  • Objective: To soften the steel for improved machinability.
  • Procedure:
  1. Heating: Heat to 820-850°C.
  2. Holding: Maintain at this temperature for a suitable duration.
  3. Cooling: Slow cooling in the furnace.

Comparative Analysis: Special Steel 8620 vs. Other Steels

Special Steel 8620 vs. 4140 Alloy Steel

特徴8620 Alloy Steel4140 合金鋼
硬化性良い非常に良い
摩耗抵抗性優れている良い
タフネスモデレート
機械加工性良い良い
コスト高いモデレート

Special Steel 8620 vs. 4340 Alloy Steel

特徴8620 Alloy Steel4340 Alloy Steel
硬化性良い優れている
摩耗抵抗性優れている非常に良い
タフネス
機械加工性良いモデレート
コスト高い高い
特殊鋼 8620/1.6523/20CrNiMoA/SNCM220 合金鋼

Selecting the Right Steel for Your Application

Choosing the right steel involves considering several factors including mechanical properties, cost, availability, and specific application requirements. Special Steel 8620/1.6523/20CrNiMoA/SNCM220 is an excellent choice for applications requiring a balance of toughness, wear resistance, and hardenability. However, for applications demanding higher strength and toughness, steels like 4340 may be more suitable despite the higher cost.

結論

特殊鋼 8620/1.6523/20CrNiMoA/SNCM220 合金鋼 is a highly versatile material that meets a wide range of industrial needs due to its superior mechanical properties. Whether you’re in the automotive, aerospace, or machinery industry, understanding its characteristics and applications can significantly enhance your project outcomes. This guide aims to provide you with comprehensive knowledge, enabling you to make informed decisions when selecting materials for your applications.

よくあるご質問(FAQ)

質問回答
What are the primary alloying elements in 8620 steel?Nickel, Chromium, and Molybdenum.
Can 8620 steel be welded?Yes, but it requires proper precautions to avoid cracking.
What is the typical hardness of 8620 steel after heat treatment?Between 28 and 34 HRC.
Where is 8620 steel commonly used?In automotive components, industrial machinery, and aerospace applications.

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