Looking for high-strength fasteners that can perform in the toughest environments? A4-80 stainless steel bolts are the ideal choice for industrial applications requiring exceptional corrosion resistance and durability. These premium-grade fasteners are widely used in marine, chemical, construction, and other heavy-duty sectors where harsh environmental exposure is a key concern.

At Bigboltnut, we specialize in manufacturing ISO 3506-1 compliant A4-80 stainless steel bolts, ensuring top-tier performance for critical fastening needs across various industries.

Why Choose A4-80 Stainless Steel Bolts?

A4-80 bolts are made from austenitic stainless steel, similar to 316 stainless steel, and offer a minimum tensile strength of 800 MPa. The "A4" classification highlights excellent resistance to chlorides, acids, and rust, while the "80" denotes their high tensile strength, making them ideal for corrosive and high-stress environments.

Chemical Composition of A4-80 Bolts

•              Chromium (16–18%) – Enhances corrosion resistance

•              Nickel (10–14%) – Provides mechanical stability

•              Molybdenum (2–3%) – Adds resistance to pitting and crevice corrosion

•              Carbon (≤ 0.08%) – Maintains strength and reduces brittleness

This optimized alloy composition ensures long-lasting reliability in marine, offshore, and chemical processing applications.

Mechanical Strength of A4-80 Stainless Bolts

•              Tensile Strength: ≥ 800 MPa

•              Yield Strength: ≈ 600 MPa

•              Hardness: 200–320 HB

These mechanical properties make A4-80 bolts suitable for high-load and high-performance applications, delivering outstanding results without failure or deformation.

Applications of A4-80 Bolts

•              Marine and offshore structures

•              Chemical processing plants

•              Construction and infrastructure projects

•              Water treatment and desalination units

For industries demanding both strength and longevity, Bigboltnut’s A4-80 stainless steel bolts offer a trusted solution backed by international standards.

We manufacture precision-engineered A4-80 stainless steel bolts that meet the highest industry standards. Our bolts are trusted for marine, construction, chemical, and industrial applications due to their strength, durability, and corrosion resistance.