Comparison of the strength of stainless steel screws and galvanized screws

Comparison of the strength of stainless steel screws and galvanized screws

Screws are a standard fastener used in a wide range of applications. During the selection of screws, it is often necessary to consider their strength to ensure that they can withstand the required loads. Stainless steel screws and galvanized screws are two commonly used screw materials, and their strength ratios are a significant concern. In this article, we will explore the strength ratio of stainless steel screws and galvanized screws and analyze their areas of application.

The strength of stainless steel screws is lower than that of galvanized screws.

Stainless steel screws and zinc-plated screws differ significantly in terms of material, corrosion resistance, color, price, and applications. In terms of strength, the mechanical properties of galvanized screws can reach a maximum level of 8.8, while stainless steel screws can only be up to -70, such as A2-70 and A4-70, which is equivalent to level 7, which is lower than galvanized screws. This difference mainly stems from the material and manufacturing process of stainless steel screws, stainless steel. However, it has good corrosion resistance but less than galvanized screws in terms of strength.

Material and corrosion resistance: stainless steel screws are made of stainless steel material with excellent corrosion resistance. In contrast, galvanized screws are steel-plated with a layer of zinc on the surface after electroplating treatment, which also improves the corrosion resistance of the screws. Stainless steel screws have excellent corrosion resistance and can be used for a long time in harsh environments. In contrast, galvanized screws have relatively low corrosion resistance and are susceptible to moisture, acid, alkali, and other environmental erosion, rust, and corrosion phenomena that will occur.

Color and price: stainless steel screws generally show relatively high silver-white cost due to their excellent corrosion resistance, long life, and other advantages. They are widely used in particular areas, such as medical, chemical, etc., and zinc-plated screws will show a metallic luster on the surface and silver-gray; the price is relatively low and applicable to general industrial and civil areas.

Occasions for use: galvanized bolts are generally used in ordinary dry environments. Equipment such as stainless steel bolts should be used for a long time in a humid climate, often water flushing and frequently rained on. If galvanized bolts are used, the time is not more than half a year, and they will rust.

In summary, although stainless steel screws in corrosion resistance performance are better in terms of strength, galvanized screws, because of their material and manufacturing process and have a higher mechanical property level, so in the case of the need for higher strength, galvanized screws are a more appropriate choice!

Strength of Stainless Steel Screws

Stainless steel screws are made of stainless steel material that is corrosion-resistant. Commonly used materials for stainless steel screws include 304 stainless steel and 316 stainless steel. The strength of stainless steel screws is mainly affected by the strength and section shape of the material. Stainless steel material has high tensile strength and shear strength, which makes the stainless steel screws able to withstand large loads in the process of use. In addition, the section shape of stainless steel screws can also improve their strength; for example, screws with cylindrical sections and hexagonal sections are more vital compared to screws with other shapes.

Strength of galvanized screws

Galvanized screws are screws that have been coated with a layer of zinc to improve their corrosion resistance. The strength of galvanized screws is mainly affected by the strength of the material and the quality of the zinc coating. The galvanized layer can provide a protective film for the screws, reducing their contact with the outside environment and thus prolonging their service life. The material of galvanized screws is usually carbon steel, and its tensile and shear strengths are lower than those of stainless steel screws. However, the galvanized layer of galvanized screws can improve their corrosion resistance, thus making up for the lack of material strength to a certain extent.

Comparison of the strength of stainless steel screws and galvanized screws

The strength ratio between stainless steel screws and galvanized screws depends on the strength of their material and the shape of their section. In general, the strength of stainless steel screws is higher than that of galvanized screws. This is because the stainless steel material has high tensile and shear strength, while the material of galvanized screws is usually carbon steel, which has relatively low strength. In addition, the cross-section shape of stainless steel screws is also more conducive to their strength. However, in some particular application scenarios, zinc-plated screws may be more suitable for use, such as in environments where better corrosion resistance is required.

18-8 Stainless Steel Socket Head Screws： Made from 18-8 stainless steel, these screws have good chemical resistance and may be mildly magnetic. Length is measured from under the head.

Black-oxide stainless steel screws have a matte-black finish. Silver-plated stainless steel screws have mild lubricity, so they thread smoothly. Chrome-plated stainless steel screws have a decorative, mirror-like finish.

Metric screws are also known as A2 stainless steel screws.

Coarse threads are the industry standard; choose these screws if you don’t know the pitch or threads per inch. Fine threads are closely spaced to prevent loosening from vibration. They are not compatible with coarse threads.

Screws that meet ASME B1.1, ASME B18.3, ISO 21269, and ISO 4762 (formerly DIN 912) comply with standards for dimensions. Screws that meet ASTM B456 and ASTM F837 comply with standards for materials.

High-Strength 316 Stainless Steel Socket Head Screws： These screws are corrosion resistant in wet environments, nonmagnetic, and electrically conductive. Length is measured from under the head.

Coarse threads are the industry standard; choose these screws if you don’t know the pitch or threads per inch. Fine threads are closely spaced to prevent loosening from vibration. They are not compatible with coarse threads.

Screws that meet ISO 4762 (formerly DIN 912) comply with specifications for dimensional standards.

Metric 18-8 Stainless Steel Button Head Hex Drive Screws： Made from 18-8 stainless steel, these button head screws have good chemical resistance and may be mildly magnetic. Length is measured from under the head.

Passivated stainless steel screws provide added protection against oxidation and corrosion.

Black-oxide stainless steel screws have a matte-black finish.

Metric 316 Stainless Steel Button Head Hex Drive Screws：316 stainless steel screws resist corrosion from chemicals and saltwater better than 18-8 stainless steel screws. All are passivated for added protection against oxidation and corrosion. Screws may be mildly magnetic. Length is measured from under the head.

Areas of application for stainless steel and galvanized screws

Stainless steel screws are widely used in various fields, such as construction, machinery, and automobiles, due to their high strength and corrosion resistance. Stainless steel screws can withstand enormous loads and can be used for long periods in harsh environments. Galvanized screws, on the other hand, are often used in outdoor environments or wet environments due to their better corrosion resistance. For example, in the construction field, galvanized screws are often used to install the exterior walls and roofs of houses to improve the durability of the screws.

Conclusion

The strength ratio of stainless steel screws and galvanized screws depends on the strength of their material and the shape of their section. Generally, stainless steel screws are more robust than galvanized screws. Stainless steel screws have a wide range of applications in various fields due to their higher strength and corrosion resistance. At the same time, galvanized screws are often used in outdoor environments or wet environments due to their better corrosion resistance. When choosing screws, we should consider the characteristics and advantages of stainless steel screws and galvanized screws according to the specific application scenarios and needs to ensure that the screws can meet the requirements of use.For high-quality High-Strength Grade 8 Steel Flanged Hex Head Screws and professional technical support, please get in touch with us at adelajonly@gmail.com or visit our website at https://www.juxinfasteners.com.