Silicon Bronze Hex Bolt (Base) | Marine environments, outdoor installations | Material: Silicon bronze (ASTM B124) Thread size: M8–M20 (ENISO 6507) Corrosion resistance: 500+ hours salt spray (ASTM B117) | Excellent corrosion resistance in marine settings Durable and long-lasting | Higher cost than carbon steel Less tensile strength than alloy steels |
Silicon Bronze Hex Bolt (Advanced) | Harsh chemical environments, offshore platforms | Material: High-grade silicon bronze (ASTM B124-20) Thread size: M8–M20 (ENISO 6507 + ISO 898-1) Corrosion resistance: 1000+ hours salt spray (ASTM B117) ▲ Tensile strength: 800 MPa (▲) | Superior corrosion resistance Enhanced load capacity for extreme conditions | Premium pricing Limited availability in specialized markets |
Stainless Steel Hex Bolt (Industry Standard) | Food processing, medical equipment | Material: AISI 304 stainless steel (ASTM A193) Thread size: M8–M20 (ISO 261) Corrosion resistance: 240-hour salt spray (ASTM B117) | Hygienic surface Resists corrosion in coastal areas | Lower tensile strength than alloy steels Magnetic in some grades |
Carbon Steel Hex Bolt (Industry Standard) | General construction, automotive assembly | Material: ASTM A307 grade C Thread size: M8–M20 (ISO 261) Corrosion resistance: Uncoated (prone to rust) | Low cost Widely available globally | Requires coatings for corrosive environments Susceptible to rust |
Zinc-Plated Steel Hex Bolt (Industry Standard) | Outdoor signage, agricultural equipment | Material: ASTM A307 with zinc plating (ASTM A153) Thread size: M8–M20 (ISO 261) Corrosion resistance: 72-hour salt spray (ASTM B117) | Moderate corrosion protection at lower cost | Plating can chip or degrade over time Less durable than stainless steel |
Alloy Steel Hex Bolt (Industry Standard) | Heavy machinery, structural steelwork | Material: Alloy steel (ASTM A449) Thread size: M8–M20 (ISO 261) Tensile strength: 650 MPa (▲ vs carbon steel) | High strength for heavy-duty applications Resists deformation under load | Higher cost Requires skilled handling to avoid damage |