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Making Your Own Rails

Part 2 of 3 MAKING RAILS a. if you start with cold rolled or cold drawn material remember that the manufacturing process for that product generally contributes to a noticeable amount of “retained stress”. That stress will tend to be released by temperature, and/or, vibration; meaning, while you are making the rail, or when the rail is in service. b. if you start with a hot rolled bar, you must allow more stock removal, not […]

CDA Bars & Rails

Cold Drawn – a Process Not a Material  Cold Roll or Cold Drawn bar is often requested from a supplier as if the term indicated a grade of steel. Those terms refer to production methods not chemistry or grade. I point this out not to be stuffy, but to try to eliminate potential safety problems in the field. Cold Roll, Cold Drawn, or Cold Finished bars may be made from 1018, 1020, 1045, 8620, 4140, […]

Reharden a 30RC 4140/4150 Type Alloy to Approximate 44RC/54RC

ASSOCIATED STEEL PRODUCTS: KROMITE® #3 (Hot Roll) & MIRRALOY® (TG&P) The following tips assume you have an existing piece of shafting in 4140 or 4150 alloy steel, that is presently at a through hardness of approx. 30RC. And, that you require an increased hardness of approximately high 40’s to low 50’s RC. PREFERRED METHOD: Long cycle anneal Anneal at 1525F, one hour per inch of greatest cross section. Cool in a furnace to 800F, at […]

Modified Steel Grades (Part 2)

4140 and 4150 – KROMITE #3 AND MIRRALOY – modified grades of high strength alloy. Last month, we talked about the word “modification” appearing on a Mill Test Report (MTR). This month I have been asked to clarify just how modifications have been incorporated into two key shaft materials provided by Associated Steel. Those items are Kromite #3 and Mirraloy. Both of those products incorporate changes (metallurgical and non-metallurgical), that address requirements of Heavy Industrial […]

Modified Steel Grades (Part 1)

Part One of Two Steel grades in the U.S. are generally referred to by the materials standards and grading systems presented by various entities. The most common being: SAE (Society of Automotive Engineers), ASTM (American Society of Testing Materials), AISI (American Institute of Iron and Steel), and ASME (American Society of Mechanical Engineers). Those are certainly not all of them. Add to those an entire host of international agencies and it becomes a very large […]

What About Steel Properties?

MECHANICAL PROPERTIES: Generally, density, thermal and electrical conductivity are considered to be PHYSICAL PROPERTIES. The following represent MECHANICAL PROPERTIES. If you expect a piece of steel to make a certain part, or provide certain benefits, you should know something about the nature of the steel you are purchasing. Understanding the mechanical properties of the steel will give you a better understanding as to how hard it will be to fabricate (cut, form, drill, tap), as […]

Welding 11 to 14% Manganese Work Hardening Hadfield Steel

From January 2020 post: NOTE: These are tips and guidelines/suggestions, acquired over the years. Not instructions. There are steel grades (Mild Steel) that pretty much won’t harden by heat treatment. There are steel grades that are hardenable by thermal treatment. And there are steel grades that won’t harden during heat treatment but will harden if you whack em’ around; known as Work Hardening, Strain Hardening, or Cold Working steels. The most common of the work […]

Heavy Maintenance Royal Pains – Galling Stainless

Over the years we have looked at the nuisance of galling in several separate blogs. That is because, every year galling makes it to the leader’s group of “Heavy Maintenance Royal Pains”, alongside, magnetism, barber pole-ing, and cupping or oil-canning. So, let’s begin with this for anyone absent those days; Galling is the seizing of mating parts. A sort of Cold-Welding as it were. When it is time to disassemble for inspection or repair, often […]

Wear Resistant Structurals: Is it Possible?

Let me know if this reads a better, changed the order and made it (in my opinion ) a little easier of a flow without altering the message Are there hardened (400bhn) wear plate angles and channels? November 2021 Blog NO SUCH THING AS WEAR RESISTANT STRUCTURALS? (Other than low-hardness A588) It is possible to make your own! We stock a true 400bhn wear plate (sheet), 1/8” x 60” x 120”. It is clean, flat, […]

Keystock Revisted

Or, “Keystock, we hardly knew ye. . .” So, back in April of last year I was eulogizing Keystock; at least the longer length, higher strength, plus-tolerance kind, that for years had been a “go-to” product for a lot of people. It seemed Keystock would be going the way of the Dodo bird. But, I was apparently wrong. More correctly, it was going the way of Coke, or New Coke, or Original Coke, whatever. The […]