Heating and hardening methods
Steel has a critical temperature at which it becomes ductile and begins to change its chemical structure. When steel is heated above this temperature, it enters what is known as the austenite stage.
From this point on, engineers can create the correct shape and quality of steel that they need. There are many ways to heat treat steel, including but not limited to:
Annealing - heating and then slowly cooling the steel to refine it and make it softer
Carburizing - using heat and carbon-rich materials to add carbon to the surface
Surface Hardening - Carburizing and rapidly cooling the steel so that the center remains soft and the rest hardens
Cyanide Hardening - similar to surface hardening, but uses molten cyanide salts instead of carbon to form a hard shell
Decarburization - removing carbon from a steel alloy by heat or oxidation
Nitriding - adding nitrogen to the surface of steel using heat and a nitrogen-rich liquid or gas
Stretching or Tempering - reheating steel that has been cooled to a specific temperature to remove hardness
Thickness Tolerance+/-0.01mm Width Tolerance+/-0.05mm Surface nature, blue, yellow, white, polished, white polished, bright, black Coils weight as your request MOQ 1 Ton Monthly capacity 500 Tons Package Standard Seaworthy Package Payment L/C, Western Union, D/P, D/A, T/T, Trade assurance Application band saw blade, rolling shutter spring, bricklayer trowel, plaster trowel, putty knives, scraper, power trowel blade, lawn trowel blade, shoe insole, flat spring, toy spring, spring baskets etc.
Spring steel strip Steel grade 65Mn,1065,SAE1055,1045,CK50,CK55, CK60,CK67, CK70,CK75, C75Cr1,50CrV4, 51CrV4, 60Si2Mn, etc Thickness 0.08-4.0mm Width 3-400mm Hardness <200HV, 200-300HV, 300-550HV Edge slit edge; both rounded; one side round, one side slit; square etc Surface polished (blue, yellow, white, grey-blue, black, bright) or Nature etc Tolerance thickness +/-0.01mm max; width +/-0.05mm max Physical propety Tensile strength: 450-1850N/mm2
Thickness Tolerance +/-0.01mm Width Tolerance +/-0.05mm Surface nature, blue, yellow, white, polished, white polished, bright, black Coils weight as your request MOQ 1 Ton Monthly capacity 500 Tons Package Standard Seaworthy Package Payment L/C, Western Union, D/P, D/A, T/T, Trade assurance Application band saw blade, rolling shutter spring, bricklayer trowel, plaster trowel, putty knives, scraper, power trowel blade, lawn trowel blade, shoe insole, flat spring, toy spring, spring baskets etc.
Supplier: Hardwood and softwood logs usa and canada
souther yellow pine logs, eastern white pine logs
walnut logs, red oak logs, cherry logs, african teak logs & various other specie
lumber sd and kd, syp lumber , ewp lumber
lumber : ashwood ,redoak, white oak ,walnut sawn timber hardwood : red merantiwood malaysia
european hardwood, beechwood,ashwood,red oak ,white oak , whitewood : ad ast, kd ,kd s4s white wood and wood pallets
austrian whitewood, bosnian whitewood, romanian whitewood, usa pine wood brazil whitewood
plywood :china ,malaysia,indonesia ,vietnam commercial plywood, veneer plywood ,melamine plywood, hpl plywood
mdf: china ,thailand ,malaysia
plain mdf ,melamine mdf , veneer mdf , high glossy mdf , film faced plywood (marine plywood): china,india,vietnam
shuttering plywood
solid chipboard, particular board and osb board
doors and frames
Buyer: Hardwood and softwood logs usa and canada
souther yellow pine logs, eastern white pine logs
walnut logs, red oak logs, cherry logs, african teak logs & various other specie
lumber sd and kd, syp lumber , ewp lumber
lumber : ashwood ,redoak, white oak ,walnut sawn timber hardwood : red merantiwood malaysia
european hardwood, beechwood,ashwood,red oak ,white oak , whitewood : ad ast, kd ,kd s4s white wood and wood pallets
austrian whitewood, bosnian whitewood, romanian whitewood, usa pine wood brazil whitewood
plywood :china ,malaysia,indonesia ,vietnam commercial plywood, veneer plywood ,melamine plywood, hpl plywood
mdf: china ,thailand ,malaysia
plain mdf ,melamine mdf , veneer mdf , high glossy mdf , film faced plywood (marine plywood): china,india,vietnam
shuttering plywood
solid chipboard, particular board and osb board
doors and frames
The Incinerated scrap or E46, is the by-product derived from the reprocessing of incinerated domestic waste. After the combustion process, the furnace output (IBA Incinerator bottom ash) is firstly washed, magnetically separated and screened to separate any no ferrous material. At a visual inspection, the material is fragmentized, with iron and steel parts, resulting partly cut or in shredded form. The stock appears heterogeneous and contains all kind of cut or dismantled steel parts such as sheets, bars, frames, wires, bolts and other iron/steel household residues. The incinerated scrap is eventually oxidized, due to the thermal and cooling treatments, that the material has been submitted to. The burnt scrap also contains minor slag parts, ash and iron oxide, due to the recovery process. Such components are inherent and adhere to the scrap surface. The total impurities, can be sorted, but not fully removed. The consignment does not contain any type of arms, ammunition, mines, shells, cartridges, radioactive contaminated, or any other explosive material in any form either used or otherwise. The collected stock, is stored in open air, on cemented flooring. It can be loaded loose in 20â?? heavy duty container. Please feel free to contact us for further details.
We offer a wide plethora of Zinc in many forms including LME registered and non registered Special High Grade Ingots and Jumbos, cathodes, dust, foil, granules, powder, pieces, anodize activated powder, shot, and a mossy form. Zinc is a bluish-white, lustrous metal. It is brittle at ambient temperatures but is malleable at 100 to 150°C. It is a reasonable conductor of electricity, and burns in air at high red heat with evolution of white clouds of the oxide. Plating thin layers of zinc on to iron or steel is known as galvanizing and helps to protect the iron from corrosion.
Supplier: Metals and mineral ores, pig iron, steel billets , copper cathodes, coils, copper mill berry and manganese ore, mill scale, pink salt, charcoal and firewood, coffee beans, tapioca flour, wood, cocoa, vanilla beans, metal scrap, sugar, palm oil and chemicals
Services: Commodity trading company
Buyer: Metals and minerals and agri commodities
Steel billets result from the second stage of the steel production process. They are hot-rolled or forged from an ingot or strand cast. steel billets from 45 x 45 mm to 150x150 mm, and round steel billets from 120 mm to 270 mm in diameter. Length : Specifiable up to 12 m Quality : In various internationally well known standards including afnor (nf), aisi, astm, bs, din, euronorm, gost, jis, iso, sae, si, ts, uni, etc. (eg. Astm a 615 gr 40 or 60, bst 420 s, din 488, st 37.2 din 17100, nfa 35015 and 16, bs 4449 (gr 250 or 460), jis g 3112 (sd 30, 35, 40), si 739 s 400, si 739 s 400 w, feb 44 k, 3 sp/ps or 5 sp/ps gost 380 88, 35 gs or 25 g2s, gost 5781-82, etc) Other grades available according to customer's request
Supplier: Detergent, food, beauty and health care, building material, ceramics, stone
Buyer: Construction material, black cement, white cement, rebars, plant fertilizer, plant pesticide
