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Archive for January, 2019

Compression Spring Types

Tuesday, January 29th, 2019

Compression Springs Manufacturers | Katy Spring:

.177 17-7 stainless steel compression springs for the valve industry

.177 17-7 stainless steel compression springs for the valve industry

.312 oil tempered compression spring, shot peened and color coded with an orange stripe

.312 oil tempered compression spring, shot peened and color coded with an orange stripe


Compression springs are the most common and most instantly recognisable springs of all. In basic terms, they are designed to resist compressive forces. As an ‘elastic’ coil, compression springs shorten in length when under pressure, and store mechanical energy within their form whilst they are under this stress. Because they can be manufactured in various shapes, sizes and with different ends or wire types, they can find themselves in a wide range of applications, including valves and electrical switches.

Compression springs are commonly coiled as a constant diameter cylinder, below are several types of compression springs including:

Conical compression springs

Concave compression springs

convex compression springs

These are used individually or in conjunction with each other. Round wire is predominant in compression springs because it is readily available and adaptable to standard coiler tooling.

Compression springs should be stress relieved to remove residual forming stresses produced by the coiling operation. Depending on design and space limitations, compression springs may be categorized according to stress level . Please view the categories below.

Please send inquiries to:
Ph. 281-391-1888

.625 inch, Chrome Silicon Compression spring wound on a CNC coiler

Thursday, January 17th, 2019

Please enjoy this, 10 second capability video where we will be featuring Katy Spring’s capabilities each month.

Call us today to see how we can help you and your company with your unique spring or wire form requirement.

.625 inch, Chrome Silicon Compression spring wound on a CNC coiler

Spring manufacturer material types

Thursday, January 17th, 2019

Springs can be essential to the operation of some equipment and must be designed and specified to withstand the application-specific conditions. For applications with harsh conditions, Katy Spring offers many additional alloys to include super-alloys such as MP35N®, Hastelloy, Elgiloy
® , Inconel, and many others.

MP35N® is a non-magnetic Cobalt- Nickel-Chromium-Molybdenum alloy having an excellent combination of very high strength, excellent corrosion resistance and high fatigue strength. MP35N® is highly resistant to sulfide stress corrosion cracking and provides excellent performance in the most demanding sour well environments. In seawater MP35N® is virtually immune to crevice and stress corrosion and pitting even at the highest strength levels and can operate at cryogenic temperatures up to 850°F (454°C).

Hastelloy C-276
Hastelloy C276 is a nickel-molybdenum-chromium super alloy with an addition of tungsten and is designed to have excellent corrosion resistance in a wide range of severe environments. The high nickel and molybdenum contents make the nickel steel alloy especially resistant to pitting and crevice corrosion.

Elgiloy® is a non-magnetic Cobalt-Chromium-Nickel-Molybdenum alloy having a unique combination of very high strength while maintaining excellent formability, excellent corrosion resistance, and high fatigue strength. Additional strength increases of up to 25% can be achieved through aging cold reduced material. Elgiloy® is highly resistant to sulfide stress corrosion cracking, and as a result is the alloy of choice in the most demanding sour well environments. In seawater, Elgiloy® is virtually immune to crevice and stress corrosion and pitting even at the highest strength levels. Elgiloy® performs across a wide range of temperatures: from cryogenic up to 850°F (454°C).

Inconel X750 Springs | Nickel Base Alloy Wire
Alloy X-750 has good corrosion resistance at elevated temperatures. A high strength nickel chrome aluminum alloy.

SAE 9254 The History of Valve Springs

Friday, January 11th, 2019

The History of Katy Spring

The history of companies is built by many short stories; some boring, some not. We’re going to try and tell the not-so-boring ones (in our humble opinion) about Katy Spring & Mfg., Inc.; a company in Katy Texas that started with a conversation that ended something like this; “Why not.”

These are the stories about Katy Spring, small bits of a bigger story that started in 1999. The stories are still unfolding new chapters every day, thanks to our wonderful customers. It’s written for our customers and future customers so that they can get to know our company, our employees, some historical background and philosophy a little better.

The stories are not told in chronological order. This blog is more of a “Readers Digest” about Katy Spring, written in whatever random order they appear. So, without further ado, let’s get started with the next read which is titled; “The History of Valve Springs”

History of strengthening steel for valve springs Wires used for valve springs include piano wires (i.e., as-drawn high-carbon steel wires) and oil-tempered wires.


For example there are oil-tempered wires that are drawn, oil-quenched and tempered. Until World War II, piano wires had been made in Sweden. Around that time, the piano wires were first used for the valve springs of aircraft engines and then started to be used for the valve springs of automobile engines.

After the war, oil-tempered wires were introduced from the USA. Since around 1964, wires with excellent heat resistance (SAE9254, JIS SWOSC-V), made of oil-tempered steel containing Si and Cr, have been valve springs in automobile engine used to increase fatigue strength and improve valve springs. This steel has become a de facto standard. The chemical compositions of wire rods used for valve springs are the compositions specified by SAE (SAE steels) and the ones developed by companies that make steel rods depicts the development trend of the wire rods. Techniques for reducing surface scratches and decarburized layers, both of which can adversely affect the fatigue strength of oil-tempered wires, and a method for peeling the wire rod surface over its entire length. In the early 1980s, companies developed and implemented other technologies for evaluating and cleaning off harmful inclusions.

Adopting this technology to the SAE9254 steel has significantly improved the fatigue strength of valve springs. Studies have been conducted aiming at optimizing chemical compositions for higher strength. In the mid-1980s, a new composition, KHV7, was developed and implemented. This composition was based on SAE9254 and has a higher content of C for increased tensile strength and an additional content of V, which refines austenitic grain and improves softening resistance. Oil-tempered wires of SAE9254 have a tensile strength of about 1,900MPa, while those of KHV7 have a tensile strength around 2,050MPa. The developed steel has an increased fatigue strength that is about 1.1 times higher than that of the conventional SAE9254.

Furthermore, applying nitriding treatment has increased the fatigue strength by a factor of about 1.3. In the early 1990s, a new alloy, KHV10N, containing 2.0% of Si, was developed to increase resistance against temper softening. This steel has raised the tensile strength of oil-tempered wires to the 2,200MPa level. Combined with nitriding treatment and modified shot peening, KHV10N has achieved a fatigue strength about 1.4 times higher than that of SAE9254. To further improve the fatigue strength and sag resistance of KHV10N, larger amounts of Cr and V were added to make the crystal grains ultrafine. The developed alloy, KHV12N, was commercialized in 2006. High-strength steel currently accounts for about 60 percent of the valve spring steel