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Chemical elements of steel and different in amount can produce various grade of fasteners.

An altered material, mechanical, and microstructural properties will define the preferred characteristics for the working environment.

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STMT Technical Challenges

  • High Strength
  • High Precision
  • Heat Resistance
  • High Corrosion Resistance
  • High Temperature Alloy
  • High Pressure Resistance
  • Non-magnetism
  • Special surface hardened

Important Chemical Elements and Effects on Fasteners Mechanical Properties

  • Iron (Fe) | The primary component of steel
  • Carbon (C) | A crucial element that defines the steel’s strength
  • Chromium (Cr) | Increases corrosion resistance and high-temperature strength
  • Manganese (Mn) | Improves strength and toughness
  • Cobalt (Co) | Improves strength at high temperatures and magnetic permeability
  • Aluminum (Al) | Most important deoxidizers in very small amounts in the material
  • Copper (Cu) | To produce precipitation hardening properties and increase corrosion resistance
  • Lead (Pb) | To improve machinability but not weld ability
  • Molybdenum (Mo) | Enhances strength and hardenability
  • Nickel (Ni) | Adds toughness and corrosion resistance
  • Phosphorus (P) | Typically a harmful impurity that can cause brittleness
  • Selenium (Se) | Added to improve machinability
  • Silicon (Si) | Acts as a deoxidizer and can increase hardenability at higher concentrations
  • Sulpher (S) | Another impurity that can negatively impact ductility and toughness
  • Tantalum (Ta) | Improves ductility, hardness, wear and corrosion resistance
  • Titanium (Ti) | Added for strength and refinement of the steel’s grain structure
  • Tungsten (W) | Promote strength at elevated temperatures
  • Zinc (Zn) | To improve the strength, ductility, and workability

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