Precision-Engineered A4-80 Stainless Steel Studbolts

A4-80 Stainless Steel Studbolts Information, Composition & Properties

A4-80 stainless steel is a high-tensile, acid-resistant grade specifically engineered for demanding fastening applications. The designation A4 identifies the material as an austenitic stainless steel, typically based on the 316 or 316L alloy family, while the 80 signifies a minimum tensile strength of 800 MPa. Unlike standard A4-70 fasteners, A4-80 studbolts undergo intensive cold working or strain hardening during manufacture to achieve significantly enhanced mechanical strength and durability. This makes them an ideal choice for critical load-bearing assemblies in industries where both structural integrity and extreme corrosion resistance are non-negotiable.

Chemical Composition:

The exceptional performance of A4-80 studbolts is rooted in its precise chemical composition. It primarily consists of chromium (16-18.5%), nickel (10-15%), and molybdenum (2-3%). The chromium content provides a fundamental layer of protection against oxidation, while the high nickel content ensures a stable austenitic structure and excellent toughness, even at cryogenic temperatures. The addition of molybdenum is crucial for studbolts used in harsh environments, as it provides superior resistance to pitting and crevice corrosion in the presence of chlorides, industrial solvents, and marine atmospheres.

Properties:

• High Tensile Strength: With a minimum tensile strength of 800 MPa and a yield strength of approximately 600 MPa, these studbolts offer mechanical performance comparable to carbon steel fasteners while maintaining the benefits of stainless steel.
• Superior Corrosion Resistance: The molybdenum-stabilized grade excels in resisting chloride-induced stress corrosion cracking and acidic environments, making it suitable for offshore and chemical processing.
• Temperature Versatility: A4-80 maintains its mechanical properties across a wide temperature range, offering good oxidation resistance up to 870°C and outstanding toughness in sub-zero conditions.
• Durability and Reliability: The combination of strain-hardened strength and innate corrosion resistance ensures a long service life for studbolts in safety-critical infrastructure and heavy industrial equipment.

99% on-time delivery

At West Special Fasteners, we deliver precision-engineered fasteners with a proven 99% on-time delivery record, ensuring your projects stay on schedule. With lead times as short as 4 weeks for full-service orders, we provide unmatched reliability for industries where timing is critical.

• Minimise delays – Receive your special fasteners exactly when needed, helping you avoid costly project interruptions.
• Support critical operations – Our dependable delivery is essential for sectors like defence, offshore, and renewables, where timing is non-negotiable.
• Boost project efficiency – Reliable deliveries streamline your workflow, allowing you to focus on execution without supply chain concerns.
• Maintain your reputation – Trust in our punctuality to ensure your commitments to your clients are met, every time.
• Transparent communication – Realistic timelines and proactive updates at every stage.
• Efficient production – Our advanced facilities and streamlined processes enable us to deliver on time, even for complex and bespoke projects.

Our ability to always deliver on time sets us apart in the fastener industry. While with many competitors you can face frequent delays, we ensure your orders are delivered with precision and professionalism – backed by our fully traceable production process and industry-leading expertise.