سبيكة INCONEL® 725

725

INCONEL® Alloy 725: Comprehensive Product Introduction

INCONEL® alloy 725 is a nickel-chromium-molybdenum-niobium alloy renowned for its exceptional corrosion resistance and high strength, particularly in sour gas environments containing hydrogen sulfide and chlorides. Developed for applications requiring excellent resistance to stress corrosion cracking (SCC) and pitting, INCONEL® 725 finds extensive use in oil and gas production, chemical processing, and marine environments. This article provides a detailed introduction to INCONEL® alloy 725, covering its chemical composition, mechanical properties, performance at different temperatures, corresponding grades, industry applications, available forms, sizes, production standards, and essential information on welding, machining, polishing, heat treatment, and cold processing across major global markets.

Chemical Composition of INCONEL® Alloy 725

INCONEL® alloy 725 is composed of specific elements to achieve its superior properties:

عنصرتعبير (٪)
النيكل (ني)58.0 دقيقة
الكروم (الكروم)19.0-22.5
الموليبدينوم (مو)7.0-9.5
النيوبيوم (ملحوظة)2.75-4.0
التيتانيوم (تي)1.0-1.7
الألومنيوم (آل)0.35 كحد أقصى
الحديد (الحديد)5.0 كحد أقصى
تانتالوم (TA)0.35 كحد أقصى
المنغنيز (من)0.50 كحد أقصى
السيليكون (سي)0.35 كحد أقصى
الكربون (ج)0.03 كحد أقصى
الكبريت (S)0.010 كحد أقصى
الفوسفور (ف)0.015 كحد أقصى

Mechanical Properties of INCONEL® Alloy 725

INCONEL® alloy 725 exhibits robust mechanical properties suitable for demanding applications:

ملكيةقيمة
قوة الشد1034 MPa (150 ksi) min
قوة الخضوع (إزاحة 0.2%)758 MPa (110 ksi) min
استطالة15% min
صلابة (روكويل ج)34-42
كثافة8.31 g/cm³

الأداء في درجات حرارة مختلفة

INCONEL® alloy 725 maintains its mechanical properties across a range of temperatures:

نطاق درجة الحرارةأداء
درجة حرارة الغرفةقوة عالية ومقاومة للتآكل
Elevated Temperatures (up to 650°C / 1200°F)يحتفظ بمقاومة القوة والأكسدة
درجات الحرارة المبردةيحافظ على الصلابة والليونة

الدرجات المقابلة في مختلف البلدان

INCONEL® alloy 725 is identified by various grades in different countries and regions:

البلد/المنطقةدرجة
الولايات المتحدة الأمريكيةUNS N07725
ألمانيا2.4668
فرنساNC22DNB
المملكة المتحدة-
اليابان-
الصينGH4169

النماذج والأحجام القياسية ومعايير الإنتاج

الأشكال والأحجام

INCONEL® alloy 725 is available in various forms and sizes to meet industrial requirements:

استمارةنطاق الحجم
صفائحالسُمك: 0.5 مم – 50 مم
لوحاتسمك: 1 مم - 100 مم
الحاناتالقطر: 6 مم - 300 ملم
الأسلاكالقطر: 0.1 ملم – 10 ملم
أنابيبالقطر الخارجي: 3 مم - 200 مم
أنابيبالقطر الخارجي: 6 مم - 300 ملم
المطروقاتأشكال وأحجام مختلفة حسب المعايير

معايير الإنتاج

INCONEL® alloy 725 conforms to international production standards:

معياروصف
ASTM B805Bars and wire
AMS 5832Bars and forgings
ولد MR0175/ISO 15156Sour gas service
API 6A718Oil and gas applications

Welding, Machining, Polishing, Heat Treatment, and Cold Processing

INCONEL® alloy 725 exhibits good weldability, machinability, and formability, making it suitable for various fabrication processes in the following ways:

  • لحام: GTAW (Gas Tungsten Arc Welding) and GMAW (Gas Metal Arc Welding) are commonly used methods, with precautions for preheating and post-weld heat treatment.
  • بالقطع: Carbide tools and coolant are recommended for achieving precise dimensions and surface finishes.
  • تلميع: Mechanical and chemical methods are employed to enhance surface smoothness and corrosion resistance.
  • المعالجة الحرارية: Solution annealing followed by age hardening enhances mechanical properties and resistance to environmental factors.
  • المعالجة الباردة: Forming and bending processes maintain material integrity and strength, suitable for various component geometries.

Industry Applications of INCONEL® Alloy 725

INCONEL® alloy 725 is indispensable in critical applications across various industries:

  • النفط والغاز: Downhole components, wellhead equipment, and tubing systems for sour gas environments.
  • المعالجة الكيميائية: Valve components, reactor vessels, and piping systems exposed to corrosive fluids.
  • البحرية: Propeller shafts, seawater cooling systems, and underwater equipment requiring high corrosion resistance.
  • الفضاء الجوي: Turbine blades, combustion chambers, and structural components in jet engines.

خاتمة

INCONEL® alloy 725 stands out as a versatile and durable material offering superior corrosion resistance, high strength, and reliability in demanding industrial environments. Its well-defined chemical composition, robust mechanical properties, adherence to international standards, and suitability for various fabrication processes make it a preferred choice for critical applications worldwide. Engineers and designers seeking longevity and performance in challenging environments can confidently select INCONEL® alloy 725 for their projects.

For detailed technical specifications and customized solutions, consulting with material suppliers and referencing specific product data sheets is recommended.


This comprehensive introduction and detailed data sheet provide a thorough overview of INCONEL® alloy 725, emphasizing its chemical composition, mechanical properties, performance characteristics at different temperatures, applications, and advantages in demanding industrial environments across various countries.