When steel is curved, it is important to keep the stress-strain curve ratio in mind. Below is a stress-strain graph that reviews the properties of steel in detail.
If tensile force is applied to a steel bar, it will have some elongation. If the force is small enough, the ratio of the stress and strain will remain proportional. This can be seen in the graph as a straight line between zero and point A – also called the limit of proportionality. If the force is greater, the material will experience elastic deformation, but the ratio of stress and strain will not be proportional. This is between points A and B, known as the elastic limit. Continue reading Exploring the Stress / Strain Curve for Mild Steel
We just produced some very thick and very wide rolled steel cylinders. For this particular industrial application in the chemical industry, the customer required a special grade of plate A572-50 with increased resistance to atmospheric corrosion. The yield strength of the plate was +50,000 psi, much higher than regular A36 steel plate (+36,000 psi). The higher yield directly impacts the amount of force needed to induce permanent deformation in the plate as you can see in following Strain/Stress graphics. Continue reading A572-50 Rolled Steel Cylinders
Many artists like creating work out of curved steel because of the originality and functionality of the final product. Taking a simple piece of straight material and yielding it to a point, yet preserving its structural properties, greatly expands an artist’s medium. Metal Rolling Services can offer thousands of variations and therefore, individuality on each design. This is why artists keep coming back to us to explore and expand their knowledge about rolled metal. Continue reading Metal Rolling Services in Free Style Form
Hollow structural steel (HSS) is becoming more and more common in structural designs. According to AISC, HSS now accounts for about 18 percent of the structural steel market. HSS has become more popular recently because of aesthetics and its superior resistance to lateral torsional buckling. In terms of curved HSS, we see it being used for AESS (architecturally exposed structural steel) and trusses. Continue reading HSS Straight Curved Connections
Each spring my wife and I take a short vacation in California. While there we usually spend a few days on the campus of Stanford University. While walking the campus grounds this spring, a sculpture/fountain caught my eye. We had walked this way many times in past years, but I had not seen this fountain before. It could be that it is a new fountain, or it could be that I had just not noticed it, since it is a fountain, and most of the fountains had been shut down due to the drought in California the last 3 years. With a rain-filled winter season, the drought in California has come to an end, and the campus fountains, silent for the last few years have come to life. Continue reading Hot and Cold Steel Bending for a Fountain Sculpture
In the past month, I had several customers looking for steel cone fabrication of some larger size cones.
Large or small steel cone fabrication require some design preparation before the actual rolling is performed. First, the steel plate (or sheet) needs to be cut to a cone “flat pattern”. The size of that flat pattern will dictate in how many pieces the cone could be rolled. If the flat pattern is so large it does not fit the available material size or in the plate roller, then the cone will need to be split into 2, 3, 4 or even more pieces. Continue reading Steel Cone Fabrication Using Minimum Amount of Pieces
We often receive inquiries from customers on the technical aspects of our metal bending services. The most common question is “can you bend this?” and generally the answer is going to be positive. There are many different machines today that assist in bending or rolling everything from thin sheet metal and flat bars to large beams and tubes. If you apply enough pressure, and perhaps a little heat, most metals will bend relatively easily. However, there are many variables that can affect the quality of a bend. It is important to consider the end use to determine what method of bending and rolling will meet the desired result.
Continue reading Metal Bending Services Questions Answered
Curved beams are used everywhere – in structures for functionality or aesthetic appeal, in circular shell stiffening rings on vessels and for monorails or roof trusses. Beams can be curved vertically (the weak-axis) or horizontally (the strong axis). When curving beams, it is important to consider distortion.
Distortion is any deviation from the original cross-sectional shape that usually occurs in every bent member to some degree. Think about curving a straight piece – the curving process is distorting the original shape to a curved shape. The potential for distortion is dependent on several factors, including the bend radius, the thickness of the material, the dimensions of the beam, bending axis, bending method and initial material geometry imperfections from the mill. Continue reading Beam Tolerance After Rolling
Early in January 2017, a company from Puerto Rico gave us a call to talk about the aluminum stair stringers for their helical staircase. The company was planning to make a helical staircase for ‘Birth of a New World’, a Christopher Columbus sculpture made by Zurab Konstantines dze Tsereteli. Tsereteli is a famous Georgian-Russian painter, sculptor, and architect known for large-scale and at times controversial monuments like the ‘Tear Drop Memorial’ pictured below, located across from Liberty Statue in New York City. Continue reading Aluminum Stair Stringers for a Helical Staircase
Before we discuss sheet metal rolling, let’s first get a few basics about sheet metal: what is it; how it’s made; how it’s designated; and how it can be used.
Sheet Metal is a metal being formed by a manufacturing process into thin, flat pieces. The sheet metal rolling process consists of passing metal stock through one or more pairs of rolls to reduce the thickness and to make the thickness uniform. Continue reading Sheet Metal Rolling