|Manufacturing shop floor||Strip thickness,|
|Slitting line No.1||0,25 – 3,0||36-465|
|Slitting line No.2||0,25 – 2,0||9-465|
Cold-rolled carbon steel strip GOST 16523-97Price: от
Cold-rolled steel strip cut from coils GOST 16523-97 is classified:
1) According to standard properties:
• First category;
• Second category;
• Third category;
• Fourth category;
• Fifth category.
2) According to drawing ability:
• H – normal drawing;
• Г – deep drawing.
3) According to minimum value of tensile strength:
• К260В, ОК300В, К390В etc.
4) According to surface finish quality:
• Improved finish group (III);
• High finish group (II);
• Extra high finish group(I).
CR steel strip GOST 16523-97 is produced of steel of different grades depending on tensile strength group.
|Steel group||Tensile strength group*||Steel grade|
|Carbon steel of normal quality (GOST 380-2005)||ОК300В||St1 (kp, ps, sp), St2 (kp, ps, sp)|
|ОК360В||St3 (kp, ps, sp)|
|ОК400В||St4 (kp, ps, sp), St5ps, St5sp|
|Carbon steel of high quality (ГОST 1050-2013)||К260В||08kp|
|К270В||08ps, 08, 10kp, 10ps, 10|
|К490В||35, 40, 45, 50|
*- tensile strength group is settled according to minimum tensile strength value. Rolled strip of ordinary quality is designated as “OK”, of high quality – as “K”.
Integrated Management System
The company has developed and implemented an integrated management system (IMS), confirmed by the compliance certificate. The certificate confirms that CR strip GOST 16523-97 is produced in accordance with the requirements of GOST ISO 9001-2011 (ISO 9001:2008), GOST R 54934-2012 (OHSAS 18001:2007), GOST (ISO 14001:2004).
CR steel strip from thin coils as per GOST 16523-97 is produced at the slitting line No1. of steel strip shop and at the slitting line No.2 of steel profile shop.
|Surface finish group||Surface finish properties/ Surface roughness||Surface condition characteristics|
|I||1.Bright (roughness Ra <= 0.60 mcm)|
2.Dull (roughness Ra <= 1.6 mcm)
3.Uneven (roughness Ra > 1.6 mcm)
|The surface imperfections are not allowed on the front surface of strip except for separate grooves and scratches less than 20 mm in length. The surface imperfections are not allowed on the bottom surface of strip when its depth exceeds 1/4 of sum of limit tolerances on thickness; contamination spots, annealing color and gray spots are also not allowed|
|II||Regulated on both sides agreement||The surface defects are not allowed on both surfaces of strip when the depth of defects exceeds half a sum of limit tolerance on thickness; annealing color is not allowed in the places located more than 50 mm from the edges. On the face side enter marks and scratches of more than 50 mm length are not allowed|
|IIIa||Not regulated||The surface imperfections are not admitted on both surfaces when their depth exceeds half a sum of limit tolerances on thickness. Annealing color is not allowed in the places located more than 200 mm from the edges|
|IIIb||Not regulated||The surface imperfections are not admitted on both surfaces when their depth exceeds half a sum of limit tolerances on thickness. Annealing color is allowed on the whole surface of material|
Tests are carried out at supplier’s place on samples in accordance with the following table:
|N||Testing method||Testing standards|
|1||Surface roughness test||GOST 2789|
|2||Tension test||GOST 11701-84 (GOST 1497)|
|3||Bending test||GOST 1409|
|4||Drawing test||GOST 10510-80|
|5||Decarburization test||GOST 1763|
|6||Hardness test||GOST 9013 or GOST 22975|
|7||Chemical analysis||GOST 22536.0 – GOST 22536.9, GOST 18895|
|8||Microstructural analysis (grain size and structural free cementite determination)||GOST 5639-82, GOST 5640-68|
UMC LLC produces CR steel strip as per GOST 16523-97 of following sizes:
|Strip thickness, mm||Strip width, mm||Inner coil diameter, mm||Outer coil diameter, mm|
|0,25 – 2,0||9 – 36||300, 500, 600||1500|
|0,25 – 3,0||36 – 650||300, 500, 600||1970|
|0,25 – 3,0||650 – 1500||500, 600||1970|
As may be agreed, strips can be produced of sizes not mentioned in GOST 16523-97, ranging from 0,25 to 3,0 thickness and from 9 to 1500 width.
CR steel strip GOST 16523-97 is produced of standard properties presented in the following table:
|Tensile strength group (GOST 16523-97)||Tensile strength, σв N/mm2 (kgf/mm2)||Percentage of elongation, δ4, % not less than|
|up to 2mm inc.||from above 2mm|
Types of packing
Packing of finished products is carried out in accordance with the requirements of GOST 7566-94, GOST 503-81 and schemes agreed with customer on. According to the normative document a strip coil shall be strapped to a pallet at least in three positions. For corrosion protection strip is coated with a layer of inhibited grease. The delivery of strips without the grease can be agreed with customer individually. Packing can be done both on vertical and horizontal axis.
Vertical axis packing
Coils from slitting line, wound on a coiler with plastic or metal strap, are laid on a wooden pallet. If a strip width is less than 50 mm, there shall be at least one strapping through an inner coil diameter, packaging an inner end of the strip.
Strip coils with wooden fillers between are put together in piles. Strips wound on single coilers can be laid without fillers between the coils.
In accordance with the scheme strips are wrapped in packing paper or film and strapped to a pallet by 4 packaging steel straps. To prevent from frontal surface deformation plastic pallets are put under packaging seals. Depending on a packing scheme products can be packed in paper or metal box.
Horizontal axis packing
Required number of CR strip coils with marking tags are laid on a pallet and strapped to each other by one or two radial packaging steel straps (through inner diameter).
Strip coils are set with wooden fillers. Strips wound on single coilers can be set without fillers between the coils.
In accordance with the scheme strips are wrapped in packing paper and strapped to a pallet by 2 and, not less than 4 on forming, radial packaging steel straps.
In order to ensure more efficient cutting of hot-rolled and cold-rolled coils, steel strip (strip) is produced. This type of product is obtained in two ways: by rolling or longitudinal cutting of sheet steel coils. The production of cold-rolled strip is based mainly on cutting, since the price for this type of strip is lower and there are much more people who want to buy it. Cold-rolled strip can be produced cold-worked, soft, normal precision, etc. The price for the strip is determined based on the market value for hot and cold rolled steel.
Hot rolled and cold rolled steel strip is used in the following areas:
Hot-rolled strip is used for the production of pipes – electric-welded and shaped. The clamping tape used for pipe ties is also made of strip.
Steel tape is actively used for the production of construction products. In particular, strip for profile, production of shaped pipes + from strip
Electrical steel tape for cable armouring can be supplied galvanized, non-galvanized, normal or high precision.
Spring cold-rolled strip produced by UMK is used in the production of springs and tools. Softer roll strip (flexible steel strip) is used for stamping machine and equipment parts.
The production of cold-rolled strip is largely focused on the production of packaging, strapping and banding materials. Strapping with steel strap is carried out with special equipment and tools, which you can buy in our company (for more details, see “Packing tool”).