Bem-vindo ao Meu Blog!
Antes de mergulharmos no conteúdo, EU adoraria que você se juntasse a mim em minhas plataformas de mídia social, onde compartilho mais insights, me envolva com a comunidade e publique atualizações. Veja como você pode se conectar comigo:
Facebook:https://www.facebook.com/profile.php?id=100087990137347
LinkedIn:https://www.linkedin.com/company/89825762/admin/dashboard/
YouTube:www.youtube.com/@carbonsteelsupply-kj9lw
TikTok:www.tiktok.com/@carbonsteelsupply
Agora, vamos começar nossa jornada juntos Espero que você ache o conteúdo aqui perspicaz, envolvente e valioso.
Índice
Introdução
EN24 and EN31 are two alloy steels widely used in industry fields. EN24 also known as 817M40,is a nickel-chromium-molybdenum alloy steel known for its high strength and good toughness. EN31 is a high carbon,high chromium steel, mainly used to manufacture the components that require high hardness and wear resistance, such as bearings and cutting tools.
Chemical Composition: EN24 and EN31 Steel
EN24
| Grau | C | Si | Mn | P | S | Ni | Cr | Mo |
| EN24 | 0.36-0.44% | 0.10-0.35% | 0.45-0.70% | ≤0.040% | ≤0.040% | 1.30-1.70% | 1.00-1.40% | 0.20-0.35% |
EN31
| Grau | C | Si | Mn | P | S | Cr | Mo |
| EN31 | 0.90-1.05% | ≤0.40% | ≤0.50% | ≤0.035% | ≤0.035% | 0.80-1.10% | ≤0.50% |
Steel Comparison: EN24 and EN31 Steel
- Common features:
Both of them are high strength alloy steel with good mechanical properties and wear resistance.
Both can used to manufacture mechanical part that bear high loads.
- Differences:
EN24 has high contents of nickel and chromium,providing better toughness and strength.However,EN31 has higher contents of carbon and chromium,providing higher hardness and wear resistance.
EN24 is suitable for the applications require high toughness and strength,such as automotive and aviation parts.EN31 is more suitable for manufacturing parts require high hardness ,such as tools and bearings.
Application Scenario: EN24 and EN31 Steel
- EN 24
Automotive Industry:Crankshafts,shafts,gear shafts and other key components.
Aviation Industry:Aircraft parts with high precision and strength requirements.
Manufacturing:Gears,shafts and structural components.
Construction Industry:Structural elements can bear heavy loads.
Oil and Gas Industry:Applications like drill pipe.
- EN31:
Tool Manufacturing:Such as bearings and cutting tools.
High Wear Resistance Components:Such as pump and compressor components.
- How to choose
Mechanical properties requirements:
EN24 is a high strength alloy steel with good ductility,wear resistance and relatively good impact properties at low temperature.It is commonly used to manufacture high strength shaft,punches and dies,drill bushings,retaining rings and gears,etc.
EN31 is a high carbon,high chromium steel, suitable for manufacturing shafts and cutting tools.
Chemical Composition: EN24 and EN31 Steel
EN24 contains higher nickel and chromium,providing better toughness anf strength.
EN31 contains higher carbon and chromium,providing higher hardness.
Heat treatment requirement:
EN24 can proceed with variety of heat treatment processes,such as normalizing,quenching,tempering,etc.to improve its hardness,wear resistance and strength.The heat treatment of EN24 include oil quenching and tempering after heating to 830-850℃.
EN31 is a high carbon and high chromium steel,it typically requires precise heat treatment yo get the required hardness and wear resistance.
Application Scenario:
If the application require high toughness and strength,EN24 is a better choice,especially in the application that bear high load and impact.If the application require high hardness and wear resistance,such as tool manufacturing and bearings,EN31 is more suitable.
Cost and availability:
Considering the cost of the material and availability of the supply chain are also important factors when making a selection.In some cases,one material may be more easy to obtain or less expensive than another.
Processability:
EN24 has good machinability and is suitable for common machining processes such as drilling,milling and turning.
EN31 as a high carbon and high chromium steel has different processability with EN24,and it need to be evaluated based on specific machining conditions and requirements.
Conclusão
EN24 and EN31 both are excellent alloy steel,however the best application fields of them are different.Therefore,understanding the characteristic and chemical composition of each steel is essential for choosing the suitable material.
FAQ
What is the difference between EN24 and EN31?
EN24 is a nickel-chromium-molybdenum alloy steel with high toughness had strength.However EN31 is a high carbon and high chromium steel with high hardness and high wear resistance.
What is the difference of heat treatment between EN24 and EN31?
EN24 usually need to heated,oil quenching and tempering,while EN31 may require a more complex heat treatment process to achieve the required hardness and wear resistance.
How are the weldability of EN24 and EN31?
EN24 has poor weldability and require high temperature preheating before welding and stress relief after welding.The weldability of EN31 is also poor and require special attention during welding to prevent welding defects.
