The Key Difference between Stainless Steel Screws and Galvanized screws

Are you done looking for screws? you’ve likely seen that some of them are made of 100% stainless steel, while others are made of galvanized steel. Because of this, it’s hard to recognize the difference between them. Keeping in view everything, the two of them look and function similarly. So, what’s the contrast between stainless steel and galvanized steel?

These two kinds of screw materials are sold by every home-improvement retailer on the planet. There’s no simple response to this inquiry that which is best since the two kinds of steel have their pros and cons. All things considered, stainless steel screw and galvanized steel have the equivalent common objective of ensuring against rust and corrosion and they accomplish this objective astoundingly well. Before selecting one for a utility, first, we have to do a deep analysis of both these materials. Their quality, strength, pricing, hence everything matters.

Stainless Steel Screws

The term stainless steel is utilized to portray steel that has been blended in with at least 10% chromium. The expansion of chromium as a composite assist with securing against rust.

Stainless steel is shinier and progressively refined looking. While stainless steel isn’t invulnerable to rust, it positively has a more significant level of opposition than 100% steel. This is the reason stainless steel is frequently utilized in open-air conditions where there’s a lot of dampness. The chromium attempts to secure the metal against rust.

Stainless is a soft metal due to the low carbon content, therefore most stainless steel materials are cold-formed and are not exposed to heat treatment. Threading and cold forming cause stainless bolts to become slightly magnetic, some fasteners will be more magnetic than others depending on size and how quick the cold forming process is. The detailed composition of stainless steel types are listed below;

Screw TypeChromeNickelMaximum CarbonMaximum Molybdenum
18-8 Stainless Steel18%8%0.08%0%
305 Stainless Steel17%-19%8%-10%0.12%0%
316 Stainless Steel16%-18%10%-14%0.08%2%
410 Stainless Steel11.5%-13.5%0%0.15%0%

Galvanized Screws

Galvanized steel, then again, is a sort of steel that has been covered in a layer of zinc. Much like its partner, galvanized steel is additionally made to secure against rust. The zinc goes about as obstruction of assurance between airborne dampness and the steel, shielding it from rust.

Galvanization is a procedure that plates steel in a way that shields it from rusting or eroding. This makes galvanized steel incredible for indoor and outside use. It additionally implies that you can support the galvanized tie or metal piece in a way that reaches another metal or material and do so by utilizing a different fastener or screw. It has different coatings;


Galvanized steel comprises of plunging a completed steel item into a hot shower of zinc. In this procedure, a bond happens, mixing the zinc to the outside of the steel. The zinc plate bonding develops until the external layer is fully composed of zinc. The external layer of this new steel item is harder than the steel in which it is attached to. The steel currently has a defensive layer plating shielding it from rust. It has different coatings;

MaterialCoating ThicknessTemperature rangeExpected DurabilitySuitabilityConditions
Hot Dipped1.7 – 3.4 mils-100 C–200 C50+ yearsIndoor & Outdoor bothIndependent of weather
Zinc PlatedUpto 1mil-100 C-200 C15+ yearsIndoor & Outdoor sparinglyIndependent of weather
Electroplated0.2 mil -100 C–200 C10+ yearsIndoor & Outdoor bothIndependent of weather


Strength Analysis

Both galvanized and stainless screws are the absolute best materials for strength and quality. They are particularly valid for metal fixation, that’s why they are commonly known as self-tapping metal screws. Nonetheless, there are some measures you will need to observe while selecting between the two.

Stainless steel screws are made out of a few components, with chromium being the most noteworthy of the added substances and nickel a nearby second. The greatest and most significant point is that the whole of the clasp is stainless. It isn’t only a covering. It’s quality and rust insurance are all through. That represents its higher rigidity rating. Companies did pressure tests on latches to mention that, what sort of crazy burden-bearing limit these stainless steel machine screws have. Stainless steel has a tensile PSI quality of 100,000 to 150,000. Hot Dipped galvanized screw has a rigidity of 62,000 PSI since they are grade 2 fasteners.

MaterialTensile Strength, PSIYield Strength, PSI
Stainless Steel screws100000-15000030000-40000
Galvanized Screws38000-6200021000-31000
Rusty Nature

Galvanized screws are dark steel within with molten zinc on the core. It’s truly hard to tunnel your way to the first steel, however, it’s been known to occur through wear and tear.

Stainless steel screw, then again, is secured by its chromium compound nature. Chromium utilizes oxygen to make a layer of rigidity to rust on the outside of the screw. That leaves one glaring shortcoming. Without the oxygen expected to proceed with this procedure, this metal will rust similarly as fast as the above discussed galvanized screw. While there aren’t such a large number of circumstances without oxygen, yet with water present, it may rust.


Both have their distinct properties acquainted with their utility. Galvanized steel screw is cheaper than stainless steel screw but stainless steel screw is much durable due to its anti-rust chromium property. This isn’t generally an immediate challenge. Galvanized screws have that solid, dull, mechanical look, while stainless steel is shinier and refined looking. Thus, galvanized wins with regards to its cheap price, stainless steel with regards to quality and rust insurance.


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