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Quick Details

  • Standard:AISI, ASTM, DIN, GB, JIS

  • Steel Grade:Q235B

  • Thickness:0.15-10mm, 0.15-4.00mm

  • Place of Origin:Hebei, China (Mainland)

  • Technique:Cold Rolled

  • Surface Treatment:Polished

  • Application:roller shutter door

  • Model Number:Spring Steel Strip

  • Brand Name:Dinghe

  • Width:8.0-300mm

  • Length:in coil

  • steel grade:CK45,CK50,CK55,CK67, CK75

  • surface treatment:Polished,Polish,tempered blue, yellow, green

  • edge:rounded,slit,sloped

  • heat treated:Hardened tempered,Annealed

  • hardness:H&T:40-55HRC

  • property:wear resistant

Packaging & Delivery

Packaging Details:Each bundle with anti-rust paper and light oil then wrapped in plastic film and put in 20ft container for standard sea worthy
Delivery Detail:30 days after the order confirmed


CK67 Mn high carbon steel strip rolling shutter spring

Hardened and Tempered   spring steel strip

Grade: ck60,ck67,ck75(SAE 1065, SAE 1070, SAE 1075) , 60Si2Mn, 50CrV4, stainless 420, 430


Hardness: 32-55hrc

Surface: gray blue, polished blue, bright, bright polished...

Edge: rounded, slit, both rounded

Coil weight:  as your requirement

Standard of surface: No flaw, burr, rust.

Yield Strees(Strength): 370-1175 N/mm2

Tensile Strength: 540-1275 N/mm2


1 Each coil is closely covered by plastic film.

2 Outer is compound paper packing.

3 Delivered in iron pallets.

Applications: spring for roller shutter,hand tools,construction tools, metal parts, auto parts....etc

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Q:Can jet fuel melt steel?
The A flame from a wick burning kerosene demonstrates incomplete burning, hence sooty, yellow and a lower temperature flame like a candle. Kerosene in a cup or puddle only burns while it is hot enough to give off vapor. The vapor is all that is burning. It is not very hot, as it is not the right mixture with air. It may not even give off enough heat to keep the kerosene itself hot enough to keep burning. A kero blow torch flame might be typically 1100-1300°C but parts can reach 1760°C or more in some cases.
Q:carbon steel?
All steel has carbon in it, usually less than 1%. The fancy steels that have enough other elements mixed in are generally called alloy steels. So, carbon steel usually refers to the most basic cheap steel. A36 is a kind of carbon steel that meets specific standards of the A36 specification. I don't know what 01 carbon steel is. Steel is available all over Los Angeles so just look in the phone book yellow pages under steel or metal. If you are near El Monte, my favorite place is Industrial Pipe and Steel, lots of cheap scrap, used machinery, and a huge industrial hardware store built right in. There is a place in Gardena called MK Metals. There's a great place just north of the Burbank airport (can't remember the name) and one in Harbor City called Action Metals (big on recycling). No sense driving all over. Just check the phone book. Two very common carbon steels just go by the terms hot rolled and cold rolled. Hot rolled is the cheapest and softest and still has the mill scale attached so the surface is a little rough and uneven, but this is by far the most commonly used. Cold rolled (usually the AISI 1018 grade) has been work hardened and rolled flat and smooth. It's slightly more expensive but stronger and prettier. If you are going to cut away some of the thickness and you want the steel to remain flat, you probably want hot rolled steel because sometimes the cold rolled steel (CRS) will warp. It does that because the steel is already prestressed from the cold rolling process and when you cut away some of the pre-stressed material the forces holding the material flat are no longer balanced.
Q:What was the Iron and Steel Corporation of Great Britain created for?
To nationalise the companies, which means the government owned them from that point on. Previously the manufacturers were various private companies which had shareholders, the government bought out the shareholders and therefore owned the companies and this is the final stage in nationalisation.
Q:best folding pocket knife or best steel for them?
We hear it all the time and to be honest, it’s really, really hard to simply tell you what the ultimate pocket knife is. That’s because there are so many different knives on the market today and each one is suited to a different user and application. Of course there is a bunch of crap out there which we will endeavor to ensure you steer clear of but even after weeding those out you’re left with literally hundreds of choices from top quality manufacturers.
Q:Stainless steel kitchen sink cleaning and polish?
A stainless steel kitchen sink is durable, easy to keep clean and disinfect, and will only grow more beautiful with age - if you take proper care of it. Clean the sink with soapy water, or a stainless steel cleaner (Spray N Sheen Stainless Steel Cleaner/Polish/Protectant) once or twice a week. Once or twice a month, fill the sink half full with a 50/50 solution of bleach and water or a special stainless steel cleaner (Stainless Steel Cleaner). Let it soak for about 15 minutes, then wash the sides and bottom and let it drain. Remember to wipe dry when done.
Q:Golf: Graphite shaft, or Steel shaft sand wedge?
I would assume that you want to carry at least two sand wedges in your bag - the modern set makeup today will have a 52 or 54 and a 58 or 60. Unless you are getting the matching wedges to a set of graphite irons , I would go with a steel shaft in sand wedges.
Q:Is Damascus Steel Fake?
damascus steel it says is made from ore containing either tungsten or vanadium, although most tools I've seen are made from chrome vanadium, it wouldn't be hard in this day and age to get the proper material. Although it DOES say in wikipedia that apparently the technique died out a long time ago due to shortage of the ore. Then it talks about reproduction attempts. So theoretically, yes, it could be the deal deal. But it does refer at the bottom about damascend steel which is made with a different technique, you could be buying one of those. NEXT TIME JUST LOOK UP THE ARTICLE YOURSELF AND READ IT
Q:whats the difference between weld steel and sheet metal?
22 gauge steel is thicker than 26 gauge steel. They are saying weld steel but actually mean black steel(mild steel) not galvanized. You will be hard pressed to find 22 gauge black steel unless you go to a local sheet metal shop or go online to find it. The big box stores most likely will not carry 22 ga. black steel. Also not many sheet metal shops don't carry sheet metal that thin unless it is galvanized. Try searching online for 22 gauge mild steel, or black steel, or let your fingers do the walking and try a couple of local metal or welding shops.
Q:where is cold formed steel framing used?
It will vary from location to location. A possible way of telling is how the material is joined. If the material is riveted together it is likely cold rolled. If the material is welded then its probably normalized steel (possibly annealed but less likely). Cold rolling increases the yield strength of the material so less of it is needed. However, it also make the material more brittle. Welding creates defects in the region surrounding the weld and these are more likely to grow and cause failure in a cold rolled steel than a normalised or annealed steels. In addition the heat from the welding will change the microstructure that was deliberately introduced by the cold rolling process resulting in a localised drop in yield strength. Normalised and annealed steels are more ductile and tougher than Cold rolled steel but they have a lower yield strength. Because they are tough and ductile they are less sensitive to crakcs and defects so welding won't lead to as big a reduction in strength. Another possible consideration is the environment they are used in. Steels exhibit a transition temperature (actually more like a range) where they go from behaving like a ductile material to a brittle material. A well known example of what this can cause are the Liberty ships in WW2 (Supply vessels from the US to the UK). These were made by welding together sheets of cold rolled steel to form one continuous Hull. Unfortuantely the transiton temperature of the steel taht was sued was around 4 degrees while the Baltic Ocean is about 0 degrees. As a result small cracks would grow and then when the reached a critical size they would tear through the ship at the speed of sound in the metal (1500m/s) and these massive cargo ships would literally snap like twigs. So, if the steel is being used somewhere really cold its unlikely to be Cold rolled too.
Q:keeping a stainless steel stove clean and shiney?
Contact a sanitary supply company for a product to maintain stainless steel.

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