Materials & Finishes
ESM works with a range of steel, spring steel, stainless steel and cast iron materials, selected according to product requirements, application and customer specifications. Material selection and processing are controlled to ensure consistent mechanical properties, durability and product performance.
01 / Steel
An alloy of iron and other elements, primarily carbon, with properties such as hardness, ductility, tensile strength and corrosion resistance that can be tailored to specific applications through material composition.
02 / Spring Steel
An iron-carbon alloy known for its strength and flexibility. ESM spring steel fasteners are heat-treated in controlled furnace processes. Components are heated to high temperatures, quenched and then tempered. Precision process controls ensure consistent material properties, quality and performance.
03 / Stainless Steel
An iron-carbon alloy enhanced with elements such as chromium, providing improved resistance to rust, staining, and corrosion compared with regular steel.
04 / Cast Iron
An alloy of iron, carbon and silicon, produced by casting in molds. It is hard and brittle, with limited ductility, and cannot be hammer-welded but fuses more easily than steel.
Stainless Range
304 / A2
One of the most commonly used stainless grades, containing approximately 18–20% chromium and 8–10% nickel. It provides good corrosion resistance for a wide range of applications.
301
A highly ductile alloy suitable for formed components. Its work-hardening properties provide increased strength, wear resistance and fatigue performance compared with Stainless Steel 304. ESM 301 fasteners are heat-treated under controlled process conditions.
316 / A4
A stainless steel grade valued for its enhanced corrosion resistance in demanding environments, including marine applications.
Finishes
ESM offers a range of surface treatments for carbon and stainless steel, selected according to application, environmental conditions and customer requirements.
PG
Zinc coating applied to steel sheet during the manufacturing process, providing corrosion protection for standard applications.
Standards: EN 10142 / EN 10147, ASTM A653/A653M
HD
Steel components are immersed in molten zinc, creating a durable zinc coating and providing corrosion protection for demanding applications.
Standards: EN ISO 1461, ASTM A123
EG
Zinc coating applied through an electrochemical process, providing a uniform surface finish and corrosion protection.
Standards: ISO 2081:2008, EN 12329, ASTM B633
PC
A durable coating applied to provide additional surface protection and a consistent finish. Available in different colours upon request.
Standard: ISO 8130
PP
Protective coating systems for specific applications requiring additional corrosion protection. Available upon request.
Standard: ISO 12944-5
PK
Chemical treatment used to remove surface contaminants and oxides from stainless steel, leaving a clean and corrosion-resistant surface.
Standard: EN 10088-22
PS
Chemical treatment that enhances the natural corrosion resistance of stainless steel by promoting the formation of a protective passive layer.
Standard: ISO 16048:2003
CC
Various coating and protection solutions are available for specific customer requirements and applications.
Available upon request.
Technical Details
For more detailed technical information, please refer to our Product Catalogue.
