ALTA SPECIAL STEEL is a leading manufacturer of tool steels in the central China. It’s located in Huangshi city, a beautiful and rich in mineral resources. This give us a great advantage. After decades of development, ALTA has grown into China’s most competitive tool steel with the highest level of modernization. 

 

ALTA, with its primary operation in iron and steel, produces premium steels with high technology contents and added values. Except focus on manufacturing hot work tool steel and cold work tool steel, we also added high speed steel and plastic mould steel product lines. These premium steels products not only cater to the domestic demands but are also exported to more than twenty countries and regions through our world marketing network for extensive application in industries such as automobile, aeronautics, electronic instruments, household appliances,manufacture of machinery etc.

 

The manufacturing shop including smelting, forging and heat treatment. Which are equipped with the most up-to-date, automated and numerically controlled facilities and equipments, Electroslag remelting (ESR) is used to meet the highest requirements in terms of purity, toughness and polishability. Die forging can meet various requirements if different size and shapes, Precise heat treatment of quenching, tempering and normalizing could make the steels in a perfect condition for using further process. With EAF, LF, VD, ESR melting facilities and over 30 years experience skillful workers, It ensure the most premium quality to global customers.

 

Looking into the future, ALTA will persist on the moral values of “Quality is the primary of the enterprise”. Adhere to sincerity, creativity and service. Create the greatest values for all stakeholders.

ALTA SPECIAL STEEL deliveries high purity tool steels, especially hot work tool steels and cold work tool steels. There are advanced smelting furnaces (EF, EAF, LF, VD, ESR), skillful steel workers and experienced technicians, meanwhile we are committed to the production equipment and high-tech talent investment, this allow us to grow into an outstanding supplier.

 Electric Arc Furnace(EAF) are the most commonly used equipment in production. Have the ability of phosphorus  removal, sulphur removal and deoxidation.

 The use of EAF allows steel to be made from a 100% scrap metal feedstock. This greatly reduces the energy required    to make steel when compared with primary steelmaking from ores. Another benefit is flexibility: while blast furnaces  cannot vary their production by much and can remain in operation for years at a time, EAF can be rapidly started and  stopped, allowing the steel mill to vary production according to demand.

 Except EAF, we also equiped Mid-frequency Induction Furnace, lower production costs than EAF, but the steel purity is  not as good as electric arc furnace.

Ladle Furnace(LF) and Vacuum Degassing(VD) are usually applied to the requirements of higher purity steel, such as producing industrial knives, the rolled plates must need be LF+VD process. 

Vacuum degassing(VD) of steel takes place after the molten steel has left the furnace and before the steel is poured into ingots or processed through a caster. The main objectives of steel degassing are reduction/elimination of dissolved gases, especially hydrogen and nitrogen.

 

Due to the superheated slag that is continuously in touch with the electrode tip, a liquid film of metal forms at the electrode tip. As the developing droplets pass through the slag, the metal is cleaned of non-metallic impurities which are removed by chemical reaction with the slag Or by physical flotation to the top of the molten pool. The remaining inclusions in ESR are very small in size and evenly distributed in the remelted ingot.

Slags for ESR are usually based on calcium fluoride (CaF2), Lime (CaO) and alumina (Al2O3). Magnesia (MgO), titania (TiO2) and silica (SiO2) may also be added, depending on the alloy to be remelted

ALTA always persist on the moral values of "Quality is the primary of the enterprise". Adhere to sincerity, creativity and service. Create the greatest values for all stakeholders.

We looking forward to establish a long-term and healthy cooperation with clients all over the world, feel free to contact us now!