| Производственное подразделение | Толщина, мм | Ширина, мм |
| Продольная резка №1 | 0,25 – 3,0 | 36-465 |
| Продольная резка №2 | 0,25 – 2,0 | 9-465 |
Cold-rolled strip from carbon structural steel GOST 2284-79
Price:от
Cold-rolled steel strip is classified:
1) According to manufacturing accuracy:
1.1 Width accuracy:
• W – extra width accuracy grade;
• common width accuracy grade.
1.2 Thickness accuracy:
• B – high thickness accuracy grade;
• T – extra thickness accuracy grade.
2) According to surface treatment:
2.1 Hardened
• NP – improved hardened quality;
• N – normal hardened quality.
2.2 Annealed:
• OP – improved annealed quality;
• normal annealed quality.
3) According to surface type:
• Dark;
• Bright;
• Bright with annealing color.
4) According to permissible depth of decarburized layer:
• First group;
• Second group.
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 2284-79 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 as per GOST 2284-79 is produced at the slitting line No1. of steel strip shop and at the slitting line No.2 of steel profile shop.
Testing methods
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 |
| 3 | Bending test | GOST 14019 |
| 4 | Decarburization test | GOST 1763 |
| 5 | Hardness test | GOST 9013 or GOST 2999 |
| 6 | Chemical analysis | GOST 22536.0 – GOST 22536.12, GOST 27809 |
Other nondestructive and destructive tests can be carried out on customer’s requirement.
Surface quality.
Bright strip can be of different shades of zinc color. Exact color of dark strip is not regulated. Roughness quality of bright strip is not more than 1,25 Ra.
Blister, scale, corrosion, tears, rolled-in particles and other defects are not allowed.
Dimentions
UMC LLC produces CR steel strip as per GOST 2284-79 of following sizes:
| Strip thickness, mm | Strip width, mm | Inner coil diameter, mm | Outer coil diameter, mm |
| 0,25 – 3,0 | 10: 12; 13: 14; 15; 16 … 430; 440; 450; 465 | 300, 500, 600 | not more 1500 |
| 0,25 – 2,0 | 38; 40; 42; 45; 48; 50 … 430; 440; 450; 465 | 500, 600 | not more 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.
Mechanical properties
Mechanical properties of CR strip GOST 2284-79 depend on the material state.
| Steel grades | Ultimate tensile strength σ в, N/mm 2 (kgf / mm 2 ) | Relative extension δ4, %, not less, with rolled thickness | ||
| Annealed tape | High quality annealed tape (OP) | Hard-worked tape | ||
| 15; 15ps; 20; 20ps | 310-490 (32-50) | – | 440-780 (45-80) | 20 |
| 18YA | 310-540 (32-55) | – | 490-830 (50-85) | 18 |
| 25 | 340-590 (35-60) | 340-540 (35-55) | 540-880 (55-90) | 18 |
| 30; 35 | 390-640 (40-65) | 390-590 (40-60) | 640-930 (65-95) | 16 |
| 40; 45 | 440-690 (45-70) | 440-600 (45-61) | 690-1030 (70-105) | 14 |
| 50; 55 | 440-740 (45-75) | 440-610 (45-62) | 740-1080 (75-110) | 13 |
| 60 | 440-740 (45-75) | 440-620 (45-63) | 740-1130 (75-115) | 10-12 |
| 65 | 440-740 (45-75) | 440-630 (45-64) | 740-1130 (75-115) | 10-11 |
| 70 | 440-740 (45-75) | 440-640 (45-65) | 740-1130 (75-115) | 10 |
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.
Description
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 according to GOST 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.
Application area
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”).
