Steel Metallurgy Properties Specifications And Applications Pdf ((better)) -

: Phases like Ferrite (soft/ductile), Austenite (tough/non-magnetic), and Martensite (hard/brittle) are formed through controlled cooling and heat treatment.

Classifies steel by application and mechanical properties (e.g., S235JR where 'S' stands for structural steel and '235' is the yield strength in MPa). Summary of Common Steel Grades Steel Type Common Grade Key Characteristics Typical Use Case Low Carbon AISI 1018 / ASTM A36 High ductility, excellent weldability, low cost Structural beams, automotive panels Medium Carbon Balanced strength and ductility, heat-treatable Gears, shafts, crankshafts High Carbon Exceptional hardness, high wear resistance, low ductility Cutting tools, high-strength wires Alloy Steel AISI 4140 (Chromoly) High fatigue strength, toughness, deep hardenability Aircraft components, oil & gas drill collars Stainless Steel Grade 304 / 316 Superior corrosion resistance, excellent hygiene Medical devices, chemical processing Tool Steel Retains hardness at high temperatures, wear-resistant Stamping dies, injection molds 4. Industrial Applications of Steel Industrial Applications of Steel | Industry | Typical

| Industry | Typical Steel Grades | Reason | |----------|----------------------|--------| | | A36, A572, A992 | High strength, weldability, cost | | Automotive | 1010, 1045, 4140, DP600 | Formability, crash resistance, fatigue life | | Oil & Gas Pipelines | API 5L X42–X80 | High strength, low-temperature toughness | | Pressure Vessels | A516 Gr70, A387 (Cr-Mo) | Creep resistance, high temp strength | | Cutting Tools | AISI O1, D2, M2 | High hardness, wear resistance | | Marine Environments | 316 stainless, Duplex 2205 | Pitting/crevice corrosion resistance | | Medical Implants | 316LVM, 17-4PH | Biocompatibility, corrosion resistance | A992 | High strength

High in low-carbon steels; decreases as carbon and alloy content increase. 3. Major Steel Specifications and Classifications cost | | Automotive | 1010