HTB3 (High Tensile Brass) | BS1400 HTB3 Alloy Castings

At Conex Metals, we specialize in the manufacture and global supply of HTB3 High Tensile Brass castings, produced in compliance with British Standard BS1400: HTB3. This alloy is engineered for applications demanding high strength, resistance to corrosion, and long-term durability under tough service conditions.

HTB3 is a manganese brass alloy, formulated to deliver exceptional mechanical performance, especially in marine, hydraulic, and heavy mechanical engineering applications. Compared to HTB1, HTB3 typically offers increased strength, hardness, and load-bearing capacity, making it ideal for dynamic load conditions.

We cast, machine, and finish HTB3 components in our advanced facilities using strict quality control processes. This ensures the dimensional accuracy, surface quality, and mechanical reliability that our clients across the globe expect.

HTB3 contains a blend of copper, zinc, manganese, aluminium, and iron, which together impart strength, resistance to wear, and good corrosion resistance. It is particularly suited for components operating in marine or chemically aggressive environments, where durability is critical. Its properties also make it an excellent substitute for traditional bronze or gunmetal in high-stress environments where standard copper alloys may fail due to fatigue, impact, or corrosion.

Chemical Composition (Typical):

Our casting capabilities include:

• Sand Casting for large and medium-sized components
• Centrifugal Casting for cylindrical parts like bushings and sleeves
• Continuous Casting for bar and rod stock

Once cast, the parts are processed in our CNC machining centers to achieve tight tolerances and surface finishes per application requirements. Surface grinding, polishing, and protective coating are available as value-added services.

HTB3 is a versatile alloy suited for manufacturing components that must withstand mechanical stress, impact loads, or corrosion. Some of the most common applications include:

• Hydraulic and mechanical bushings and sleeves
• Marine propeller nuts, shafts, and couplings
• Pump and valve bodies
• Heavy-duty worm gears and gear segments
• Railway, mining, and earthmoving parts
• Bearings for large structural or mechanical systems

HTB3 alloy castings from Conex Metals are used in a wide variety of industries:

• Marine & Offshore Structures
• Oil & Gas Equipment
• Railways & Locomotive Parts
• Construction & Mining Machinery
• Water Treatment & Irrigation Systems
• Pumps & Valves Manufacturing
• Power Plants & Energy Sector

Mechanical Properties (Typical):

These values can vary based on casting method and heat treatment.

We manufacture HTB3 parts to international tolerance standards, such as:

• ISO 8062 CT7–CT8 for sand castings
• Custom tolerance ranges for machined components

Every component undergoes dimensional and surface inspection before shipment.

HTB3 components can be finished to suit end-use environments, including:

• Precision Machined Surface
• Mirror Polished
• Anti-corrosion Coating (marine-grade epoxy or nickel plating)

Our standard production time is 4 to 6 weeks, depending on quantity and part complexity. We also offer rapid prototyping for urgent project timelines.

• British Standard: BS1400: HTB3
• Closest US/UNS Equivalent: C86500 (Manganese Bronze, high strength)

At Conex Metals, we are committed to providing more than just metal — we deliver performance. Our metallurgical expertise, in-house foundry, and CNC precision machining allow us to deliver consistent quality and value to industrial customers worldwide. Whether you need custom machined bushings, large-volume castings, or engineered HTB3 components, we provide solutions tailored to your technical and commercial needs.