Well, the first thing that happens to his parts at the galvanizing place is that they pickle the parts to remove the mill scale! He claims the HRP&O doesn't galvanize as well. I have tried to talk one of my large customers into using HRP&O instead of HR and he says no. I much prefer to run hot rolled pickled and oiled so I don't have to worry about the mill scale. Oh I miss the good old days of beautiful shiny blue hot rolled where you didn't even notice the mill scale. It will dull punches and dies rather quickly. It is also very abrasive to my press tooling. It will flake and pop off and get all over everything. The mill scale seems to be worse on this crap also. I get nasty breakaways and burrs on large ID's and it just wants to hang onto the punch and not strip. The other side of it is that some of the stuff that blanks nice punches like crap. Then I have to worry about tonnage requirements and tooling damage. Then I'll get a piece that makes it go bang, bang, bam, bam. I can be cruising along blanking out 1/4' thick 6' diameter circle blanks and the press and tooling is just singing a sweet thump, thump, thump tune. I have plates from the same lot act differently. Now I think they don't care if they hit maximum or minimum on the contents. I think the biggest difference is that they used to hold the contents pretty middle of the road and the material was fairly consistent. I can't tell if it is too many Chevys or too many Yugos that screw it up. Like Richard says, you just don't know what got put in the mix.

The plain old 1/4' hot rolled just gives me fits. It will vary from lot to lot as to how well it blanks/punches. The DIN equivalent for JIS G3101 SS400 steel is ST37-2 and the GB equivalent for JIS G3101 SS400 steel is Q235B.I work with quite a bit of A-36 plate, generally 1/4' thick. The ASTM equivalents for JIS G3101 SS400 steel are ASTM A36 and ASTM A283C the EN equivalent for JIS G3101 SS400 steel is S235JR. A36 steel is also used for components in the automotive, construction, heavy equipment, and oil and gas industries. Likewise, buildings are frequently created with A36 steel because of its high strength and toughness. Many bridges are constructed with A36 steel. Also, as mentioned, the mechanical properties make it particularly suited for structural applications. Those equivalent materials have little difference in chemical composition and mechanical properties, below are some of the grades comparison for your reference:ĪSTM A36 steel plates and A36 equivalent materials chemical composition: (%) GradeĪSTM A36 steel plates and A36 equivalent materials mechanical properties: (%) GradeĪ36 low carbon steel is used in many different industries for a variety of applications because of its relatively low cost.

Since A36 does not contain large amounts of nickel or chromium, it does not have excellent corrosion resistance.ĪSTM A36 steel plates will have a lot of equivalent materials, such as A283C, FE360B, E24-2, Chinese material Q235B, Japan material SS400 and SM400A, European material EN S235JR, Germany material DIN ST37-2, etc. These alloying elements are added to give A36 steel its desired chemical and mechanical properties. A36 steel usually has small amounts of other alloying elements as well, including manganese, sulfur, phosphorus, and silicon. The low carbon also prevents heat treatment from having much of an effect on A36 steel. This allows A36 steel to be easily machined, welded, and formed, making it extremely useful as a general-purpose steel.

Low carbon steels are classified by having less than 0.3% carbon by weight.

A36 material properties