High carbon steel coil Indonesia

High carbon steel coil Indonesia
High carbon steel coil Indonesia
Brand
HDT steel
Length
6-12m
Standard
GB/ASTM/JIS/DIN
Delivery time
7-15 days
Payment method
T/T L/C
Product customization
Yes
In stock
Yes
High carbon steel coils are widely used in Indonesia because of their unique characteristics. We are a major producer and exporter of high carbon steel coils in China, supplying high quality high carbon steel coils to Indonesian customers. We will properly package and transport the high carbon steel coils to ensure that customers receive the products smoothly.

High carbon steel coils

High carbon steel coils are often called tool steel coils, with a carbon content ranging from 0.60% to 1.70%, and can be hardened and tempered. Hammers, crowbars, etc. are made of steel with a carbon content of 0.75%; cutting tools such as drills, taps, reamers, etc. are made of steel with a carbon content of 0.90% to 1.00%. Indonesia is a net importer of high carbon steel coils. Indonesia imported 2.3 million tonnes of high-carbon coil last year, far exceeding exports.

Advantages of High Carbon Steel Coils

1. After heat treatment, high hardness (HRC60-65) and good wear resistance can be obtained.

2. In the annealed state, the hardness is moderate, and it has good machinability.

3. The raw material is easy to obtain and the production cost is low.

Disadvantages of High Carbon Steel Coils

1. Poor thermal hardness. When the working temperature of the tool is higher than 200°C, its hardness and wear resistance will drop sharply.

2. Low hardenability. The diameter of fully hardened during water quenching is generally only 15-18mm; the maximum diameter or thickness (95% martensite) of fully hardened during oil quenching is only about 6mm, and it is easy to deform and crack.

The above advantages and disadvantages of high carbon steel coil determine its use. In Indonesia, high-carbon steel coils are widely used in cutting, drilling, lathes, milling machines and other environments that require high hardness.

Processing of High Carbon Steel Coil

The hardness and strength of high-carbon steel mainly depend on the amount of solid-dissolved carbon in the steel, and increase with the increase of the amount of solid-dissolved carbon. When the solid solution carbon content exceeds 0.6%, the hardness does not increase after quenching, but the number of excess carbides increases, the wear resistance of the steel increases slightly, and the plasticity, toughness and elasticity decrease. For this reason, different steel grades are often selected according to the conditions of use and the matching of the strength and toughness of the steel. For example, to manufacture springs or spring parts with little force, you can choose 65 steel with a lower carbon content. In Indonesia, general high carbon steel can be produced by electric furnace, open hearth furnace and oxygen converter. When high quality or special quality is required, electric furnace smelting plus vacuum self-consumption or electroslag remelting can be used. When smelting, strictly control the chemical composition, especially the content of sulfur and phosphorus. In order to reduce segregation and improve isotropic properties, steel ingots can be subjected to high-temperature diffusion annealing (especially important for tool steels). During hot working, the forging (rolling) stop temperature of hypereutectoid steel is required to be low (about 800°C). After forging and rolling, the precipitation of coarse mesh carbides should be avoided. Slow cooling should be taken below 700°C to prevent thermal stress. cause cracks. Prevent surface decarburization during heat treatment or hot working (especially important for spring steel). There must be sufficient compression ratio during hot working to ensure the quality and performance of the steel.

Welding of high carbon steel coils

High carbon steel coil has poor weldability due to its high carbon content. Its welding has the following characteristics:

(1) The thermal conductivity is poor, and there is a significant temperature difference between the welding zone and the unheated part. When the molten pool cools rapidly, the internal stress caused in the weld is easy to form cracks.

(2) It is more sensitive to quenching, and martensitic structure is easily formed in the near seam area. Due to the effect of tissue stress, cold cracks are generated in the near seam area.

(3) Due to the influence of welding high temperature, the grain grows fast, and carbides are easy to accumulate and grow on the grain boundary, making the weld weak and reducing the strength of the welded joint.

(4) High carbon steel is more prone to hot cracks than medium carbon steel during welding.

Indonesia's high-carbon steel welding technology and process are very mature, which can guarantee the performance of high-carbon steel to the greatest extent.

Packaging of High Carbon Steel Coils

Indonesian customers have two main packaging requirements for high carbon steel coils.

One is simple packaging.

After the high-carbon steel coil is coiled, 1 to 3 steel strips are bound on the outer circle for fixing. This process is suitable for short-distance transportation and high-carbon steel coils with good transportation conditions.

The second is refined packaging.

According to the requirements of the packaging process, different packaging materials are wrapped on the outer surface of the high-carbon steel coil and bound to shape. This process is suitable for cold-rolled high-carbon steel coil.

Before packaging the workpiece, it is necessary to know the tonnage, width and diameter of the steel coil in detail, and prepare the required packaging materials. The simple packaging steps of steel coil packaging board are explained as follows:

1. Lift the steel coil to the packaging platform.

2. Install the steel outer corner protectors on both sides, standardize the position of the corner protector interface, and press them tightly with two circumferential straps. The position of the lock should be at 12 o'clock on the clock and on the same horizontal line as possible. When the straps are tightened, Use a rubber hammer to tap the raised part of the corner protector flat.

3. Install the inner corner protectors on both sides. The corner protector interface is pressed tightly with a longitudinal strap, and the eyelets are bundled three times evenly. The lock positions should be evenly arranged on the same circumference at the same end of the steel coil. The straps must be tightened and cannot Skew is not correct.

4. Bind the circumferential middle strap and press the longitudinal strap.

Regardless of the packaging method, it is related to product use, packaging equipment, steel coil storage environment, transportation method, transportation distance, packaging material selection, user-specific special requirements, packaging labor costs, etc.

Our company generally packs high-carbon steel coils according to customer requirements. We can do all kinds of packaging techniques.

Transportation of High Carbon Steel Coils

In Indonesia, high-carbon steel coils are widely used in automobiles, bridges, ships and other manufacturing fields because of their high strength and good toughness. Many times it needs to be imported, but due to its heavy weight and easy rolling, the risks in land and sea transportation are not small.

The transportation difficulty is packing. If the container cannot be packed properly, there is not only the risk of leaking and knocking over the container, but also the shaking of the ship after boarding may also affect other cargo on board and cause heavy losses. This requires reinforcement personnel to understand the characteristics of high-carbon steel coils and containers, and eliminate hidden dangers from the source.

01 laying wooden corrugated

In order to increase the force surface, during transportation, we first lay a number of wooden poles inside the container to ensure that the wooden poles are placed perpendicular to the bottom beam of the container, and then placing the high-carbon steel coils on it will greatly increase the force-bearing area and reduce the impact on the load. Pressure on the bottom of the container to avoid damage to the container during hoisting.

02 pull the steel wire

In order to avoid rolling, it is necessary to pull the steel wire to fix the high-carbon steel coil and the container to ensure the overall stability.

03Flexible into the box

According to the number of high-carbon steel coils loaded in each box, different ways of entering the box are applicable: either use a forklift to directly lift the coil eye into the box; or use a forklift to carry the coil steel and roll the coil into the container.

We will formulate corresponding transportation plans based on different packing methods, number of pieces, customer requirements, etc., and actively coordinate with relevant units to eliminate potential safety hazards and ensure the smooth transportation of high-carbon steel coils to Indonesia.

 


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