The metals/materials technology area has information on the most commonly used materials in metal fabrication ̶ carbon steels; stainless steels; high-strength, low-alloy steels (HSLAs); and the 6000 series aluminum ̶ and those that aren't as common, such as the red metals, refractory metals, titanium, and magnesium.
October 7, 2013 | By Susan Conley
Applying a corrosion prevention product to steel isn’t enough. If the workpiece is contaminated with something as minor as fingerprints or steel fines, corrosion can get a foothold. Understanding the components that make up a corrosion cell, and how a corrosion cell works, is necessary in learning how to prevent corrosion from getting a start.
September 5, 2013 | By Chad Wagner
Maintaining a boiler system can be very expensive and require a lot of downtime for the equipment. The electric arc wire thermal spray process is one efficient way to create a protective overlay on boiler components and systems, helping to reduce replacement costs and outage times.
October 8, 2012 | By Michael Pfeifer
Free-machining steels shouldn’t be welded. If a fabricator has a job requiring a free-machining steel, engineers and fabricators should get together to determine the best action. Can welding be avoided by using fasteners? If not, which weldable materials exhibit acceptable machining characteristics, and do these materials meet design requirements?
September 10, 2012 | By Professor R. Carlisle "Carl" Smith
At least a dozen chromium molybdenum (CrMo) steel combinations exist. One of the more recent alloys consists of chromium, molybdenum, vanadium, niobium (columbium), and nitrogen. Beginning sometime in the 1970s, this material became popular for use in high-temperature applications, such as gas and...
July 9, 2012 | By Professor R. Carlisle "Carl" Smith
Chromium molybdenum alloys have characteristics that make them good choices for many products used in construction and manufacturing. This article discusses some applications for these materials and the processes and equipment necessary to complete them.
May 25, 2012 | By Keith Packard
The goal when welding any material is to change its microstructure as little as possible and to preserve its mechanical and chemical properties. To achieve this you must be able to determine its weldability, control the heat input, and prevent rapid cooling.
May 8, 2012 | By Professor R. Carlisle "Carl" Smith
Equipment wears as it’s used, particularly in heavy applications such as extracting natural resources from the earth. Surface welding used to repair and strengthen equipment helps prevent costly downtime.
March 5, 2012 | By Professor R. Carlisle "Carl" Smith
Stainless steel comes in various forms—austenitic, martensitic, and ferritic. Which type you use depends on your application requirements.
From electric arc wire spray to HVOF technology, various thermal spray process options provide durability and protection against wear and corrosion in myriad applications.
January 9, 2012 | By Professor R. Carlisle "Carl" Smith
Some fabricators and educators are fascinated by bridges. Bridges come in many different types, and diverse materials are used to build them.
October 10, 2011 | By Professor R. Carlisle "Carl" Smith
By using today’s new alloys, you can cut costs, extend equipment use, and actually improve products. Here are some examples of how this can be done by welding with aluminum bronze (CuAl).
July 26, 2011 | By Amanda Carlson
Welding and fabricating using exotic metals requires a special touch, one that Schwabel Fabricating Co., Tonowanda, N.Y., has built its business on for the last 53 years.
July 21, 2011 | By Professor R. Carlisle "Carl" Smith
Creating welding procedures for abrasive-resistant (AR) materials can be difficult because many of them do not conform to ASTM,ASME, or SAE standards for chemical or mechanical properties. However, these materials can be welded successfully.
June 20, 2011
Stainless steel is favored for many uses because it doesn’t rust and it’s easy to clean. However, for medical environments, copper is making inroads. Copper has been shown to kill six varieties of bacteria, and the EPA has registered more than 350 alloys to have antimicrobial properties.
May 11, 2011
Yield strength and ultimate tensile strength can be used to determine the flow stress curve. First, the tensile test reveals tensile force and elongation, which are used to obtain the stress-strain curve, which reveals yield stress and ultimate tensile strength.