Material selection is one of the most critical decisions in custom spring performance and longevity. It is essential to choose a material that possesses the performance traits necessary to meet the specific demands of the application.
Whether your next project requires superior corrosion resistance, temperature tolerance, or the ability to overcome fatigue and other stressors, it is vital to select a material that can withstand the environmental conditions to which the custom spring will be exposed.
At Argo Spring Manufacturing Co., Inc., we offer a wide selection of top-quality precision springs to meet the unique demands of critical applications across various industries, including aerospace, construction, defense, medical, and oil and gas.
This comprehensive materials guide takes an in-depth look at the unique properties of common spring materials, identifying their best application use cases.
Common Spring Materials
Precision springs are made from a wide variety of materials and must be chosen based on the specific needs of the application. The selected material must be flexible, durable, and capable of withstanding varying levels of force. Knowing which spring material to use depends on the function the spring will serve.
Argo Spring Manufacturing Co., Inc. offers a wide variety of precision springs, including custom extension springs and custom torsion springs. All of our top-quality springs can handle normal wear and tear as expected, exhibiting a long and resilient life cycle.
When selecting the proper spring material, factors that play into the decision-making process include manufacturing capabilities, mechanical properties, and environmental conditions.
Carbon Steel
Music wire, oil-tempered mechanical board (OTMB), and hard-drawn MB are categorized as high-carbon cold-drawn steel, a fine-grained tempered material which features the following properties:
- Cost-effectiveness
- Durability
- Excellent tensile strength
- Fatigue resistance
- Flexible performance
- Versatility
Carbon steel is best suited for low-cost applications where fatigue resistance and moderate strength are sufficient. The material is commonly used to create general industrial springs for use in automotive parts and industrial machinery.
Stainless Steel
Stainless steel is one of the most used materials in precision spring manufacturing. The versatile alloy is a popular choice for many applications due to its excellent fatigue strength, affordability, and high resistance to corrosion and heat.
The material can meet the unique demands of high-stress applications and is best suited for environments with high humidity or corrosion. It can also withstand exposure to chemicals or moisture, often found in the marine, medical, and food processing industries.
Stainless steel is available in several grades, with each exhibiting different properties. While some grades of stainless steel can be highly magnetic, other types may have poor tensile strength or electrical conductivity. It is essential to select the proper grade to ensure the material meets the unique demands of the specific application.
Copper Alloys and Specialty Grades
Copper alloys are an excellent material choice for high-performance applications, exhibiting the following properties:
- Excellent corrosion resistance
- Good fatigue strength
- High electrical conductivity
- Superior strength and toughness
Copper alloys can be heat-treated for high-stress applications. They are commonly used to manufacture heavy-machinery springs for use in the automotive and aerospace industries. The material is best suited for use in high-temperature or high-load environments where strength and reliability are critical.
Specialty grades include non-metallic copper alloys, such as phosphor bronze, a non-ferrous spring wire that features good electrical conductivity and corrosion resistance. Beryllium copper offers similar properties, featuring greater strength than other materials. After spring fabrication, the material is precipitation hardened to achieve the desired properties.
While specialty grade alloys are a solid material choice, they are often overlooked due to their cost.
Exotic Alloys for Demanding Environments
Argo Spring Manufacturing Co., Inc. offers a comprehensive selection of exotic alloys for use in demanding environments. These materials include:
Inconel
Inconel is a nickel-chromium-based high-performance alloy known for the following properties:
- Corrosion resistance
- Exceptional high-temperature strength
- Resistance to oxidation in extreme environments
- Withstands harsh operating conditions
The material is best suited for high-stress and high-temperature applications due to its good mechanical properties at moderately elevated temperatures. Inconel can maintain its structural integrity in critical applications, such as jet engines, nuclear reactors, high-temperature gas turbines, oil and gas extraction, aerospace components, and cryogenic applications.
Titanium
Titanium is a lightweight material that exhibits excellent corrosion resistance and strength-to-weight ratio. It is commonly used in applications across a broad range of industries that require exceptional durability, including:
- Aerospace
- High-performance engineering
- Medical implants and devices
Titanium is approximately 50% lighter than steel yet maintains similar durability and strength with more responsive deflection.
Hastelloy
Hastelloy features excellent resistance to chloride and sulfur compounds, making it ideal for waste treatment and marine applications. The oil/gas and chemical processing industries frequently turn to Hastelloy for custom spring manufacturing due to the material’s excellent resistance to corrosion and high temperatures.
Monel
Monel is a nickel-copper alloy that features exceptional corrosion resistance at moderately elevated temperatures. The material exhibits good mechanical properties for applications exposed to subzero temperatures and is generally resistant to sulfuric, hydrochloric, and hydrofluoric acids. Monel is best suited for chemical processing and marine applications.
Matching Materials to Applications
Considering mechanical properties, such as elasticity and tensile strength, is essential when choosing a material for a specific application. The manufacturing process is equally important, as some materials are easier to coil, form, or heat-treat than others.
Advanced spring technologies and materials include:
- Metal Matrix Composites (MMC). Often used in critical aerospace applications, the process combines metal with other materials to reduce weight and achieve superior strength.
- Shape Memory Alloys. Certain alloys have the ability to return to their original shape after being heated, which is ideal for springs that must perform under various environmental conditions.
When selecting a material for manufacturing precision springs, it is vital to consider the following environmental factors and how they correlate to the unique challenges and demands of the specific application.
Corrosion, Fatigue, and Temperature Factors
These key factors to consider include:
- Corrosion resistance. Precision springs used in marine environments, chemical processing, or other corrosive conditions require materials such as stainless steel or specialized alloys to handle the challenges associated with corrosion resistance.
- Fatigue resistance. Stainless steel and alloy steel can handle the demands of a mechanical load, where the spring is required to undergo frequent tension or compression without experiencing fatigue.
- Temperature resistance. Materials such as titanium and Inconel are the preferred choice for high-heat applications. Stainless steel, on the other hand, offers consistent performance in both cold and hot conditions.
Contact Us to Learn More About Material Selection for Custom Precision Springs
Selecting the right spring material is crucial to ensuring the functionality and longevity of critical components. By understanding the unique properties of each material, it becomes easier to make an informed decision that benefits the overall success and performance of your project.
At Argo Spring Manufacturing Co., Inc., we leverage our expertise and decades of experience to help our customers select the best material for their precision spring application. Proper material selection helps to reduce the risk of failure and minimize the total cost of ownership.
Contact us or request a quote today to learn more about the features of our various spring types, and let our expert team help you choose a material that matches the exact requirements of your next project.