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What is SS400 material? What is the corresponding domestic steel grade for SS400?
SS400 is a Japanese standard carbon structural steel plate conforming to JIS G3101. It corresponds to Q235B in the Chinese national standard, with a tensile strength of 400 MPa. Due to its moderate carbon content, it offers well-balanced comprehensive properties, achievi...Read more -
Why is the same steel called “A36” in the U.S. and “Q235” in China?
Accurate interpretation of steel grades is crucial for ensuring material compliance and project safety in structural steel design, procurement, and construction. While the steel grading systems of both countries share connections, they also exhibit distinct differences. ...Read more -
How to calculate the number of steel pipes in a hexagonal bundle?
When steel mills produce a batch of steel pipes, they bundle them into hexagonal shapes for easier transportation and counting. Each bundle has six pipes per side. How many pipes are in each bundle? Answer: 3n(n-1)+1, where n is the number of pipes on one side of the out...Read more -
What exactly is the difference between zinc-flower galvanizing and zinc-free galvanizing?
Zinc flowers represent a surface morphology characteristic of hot-dip pure zinc-coated coil. When steel strip passes through the zinc pot, its surface is coated with molten zinc. During the natural solidification of this zinc layer, nucleation and growth of zinc crystal...Read more -
How to distinguish hot-dip galvanizing from electrogalvanizing?
What are the mainstream hot-dip coatings? There are numerous types of hot-dip coatings for steel plates and strips. Classification rules across major standards—including American, Japanese, European, and Chinese national standards—are similar. We will analyze using the ...Read more -
What is the difference between C-channel steel and channel steel?
Visual differences (differences in cross-sectional shape): Channel steel is produced through hot rolling, directly manufactured as a finished product by steel mills. Its cross-section forms a “U” shape, featuring parallel flanges on both sides with a web extending vertic...Read more -
What’s the difference between medium and heavy plates and flat plates?
The connection between medium and heavy plates and Open slabs is that both are types of steel plates and can be used in various industrial production and manufacturing fields. So, what are the differences? Open slab: It is a flat plate obtained by uncoiling steel coils, ...Read more -
What is the difference between SECC and SGCC?
SECC refers to electrolytically galvanized steel sheet. The “CC” suffix in SECC, like the base material SPCC (cold rolled steel sheet) before electroplating, indicates it is a cold-rolled general-purpose material. It features excellent workability. Additionally, due to...Read more -
Differences Between SPCC and Q235
SPCC refers to commonly used cold-rolled carbon steel sheets and strips, equivalent to China's Q195-235A grade. SPCC features a smooth, aesthetically pleasing surface, low carbon content, excellent elongation properties, and good weldability. Q235 ordinary carbon ...Read more -
Difference Between Pipe and Tube
What is pipe？ Pipe is a hollow section with round cross section for the conveyance of products, including fluids, gas, pellets and powders, etc. The most important dimension for a pipe is the outer diameter (OD) together with the wall thickness (WT). OD minus 2 times ...Read more -
What is API 5L?
API 5L generally refers to the implementation standard for pipeline steel pipes, which include two main categories: seamless steel pipes and welded steel pipes. Currently, the commonly used welded steel pipe types in oil pipelines are spiral submerged arc welded pipes ...Read more -
Steel pipe dimensions
Steel pipes are classified by cross-sectional shape into circular, square, rectangular, and special-shaped pipes; by material into carbon structural steel pipes, low-alloy structural steel pipes, alloy steel pipes, and composite pipes; and by application into pipes for...Read more
