We are your reliable source for high-quality welding electrodes that deliver exceptional performance in diverse welding applications. We recognise that the welding industry demands products that are durable, efficient, and capable of producing superior welds. Our unique challenge lies in ensuring that the welding electrodes we import adhere to stringent quality standards. To address this, we partner with established manufacturers who have a proven track record of delivering reliable welding products. We conduct comprehensive quality control checks on each batch of welding electrodes, verifying their chemical composition, tensile strength, and welding performance. By doing so, we guarantee that the welding electrodes we supply consistently meet or exceed industry standards, enabling our customers to achieve impeccable welding results.
Lump sulfur, also known as granular or rock sulfur, is typically characterized by a purity of 99.80% or higher, with a maximum ash content of 0.05%.
It should also have a limited acidity (H2SO4) of 0.02% or 0.03% and minimal moisture content (0.5% or 0.2%).
More detailed breakdown of lump sulfur specifications:
Purity:
Dry Basis: 99.80% minimum purity is a common specification.
Other Standards: Some standards like Refinery Specifications, may specify a purity of 99.98%.
Impurities:
Ash Content: A maximum ash content of 0.05% is a typical requirement.
Acidity: A maximum acidity (H2SO4) of 0.02% or 0.03% is common.
Organic Substances: Some specifications limit organic substances to 0.01% or 0.03% maximum.
Moisture: A maximum moisture content of 0.5% or 0.2% is generally specified.
Mechanical Impurities: Some specifications require the absence of mechanical impurities like paper, wood, or sand.
Other Impurities: Some standards specify limits for arsenic, selenium, tellurium, and lead impurities.
Color and Appearance:
Color: Bright yellow is the typical color specification.
Other Considerations:
Test Methods:
Specifications often include test methods, such as ASTM D-4239, ASTM D-1509, ASTM D-1613, and ASTM D-2790, for determining the various parameters.
Bulk Density:
Granular sulfur has a bulk density of around 70 lb/cu ft (1121.29 kg/cu m).
Solubility:
Sulfur is insoluble in water, partially soluble in acetone, and slightly soluble in diethyl ether and alcohol.
Keep away from heat, hot surfaces, Sparks, Open flames and other ignition sources. No smoking. Proper
grounding procedures to avoid static electricity should be followed. Prevent dust accumulation (to minimize
explosion hazard). Avoid generating dust.
Other Hazards:
It contains a small amount of Hydrogen Sulfide. Hydrogen sulfide is a fatal and highly flammable gas with a
rotten egg odor that quickly causes odor fatigue. Heating of this product and storage under elevated
temperatures or over long periods of time may release higher amounts of Hydrogen Sulfide. Hydrogen
Sulfide is also an asphyxiant. Exposure may aggravate preâ??existing eye, skin, or respiratory conditions.
Storage:
(1) Prevent from moisture absorption, keep away from heat, keep in air well â?? ventilated area.
(2) Do not contact with acids and alkaline substance, protect from dust.
(3) Ensure bags are kept in sealed and in good condition.
Packing:
The packing is in 50/Kg. bags, Jumbo Bag 1/MT or in Bulk.
Spcification of Sulfur:
Color: Bright yellow when solid (No dark particles visible)
Purity: 99.8% by weight minimum, dry basis. Sulfur Content: 10ppm by weight, maximum (0.01%)
Moisture Content: 0.50% by weight maximum
Ash: 300ppm by weight, maximum (0.03%)
Organic matter: 500ppm by weight, maximum (0.05%)
Size: 2mm â?? 6mm
Bulk Density: Minimum 1040 Kg/m3 (loose)
Bulk Density: Minimum 1200 Kh/m3 (packed)
Acidity as H2SO4: 50ppm by weight, maximum (0.005%)
Chemical properties: A soft metal (face-centered cubic) with a blue-grey color and metallic luster. Melting point: 327.5â??. Boiling point: 1740â??. Relative density: d1811.3437. Soluble in nitric acid and hot concentrated sulfuric acid, insoluble in water. Uses: Used in compound semiconductors, refrigeration elements, infrared photoelectric conversion devices, high-efficiency temperature difference elements, and solders, etc. Uses: Used as analytical reagents and reducing agents Uses: Used as high-purity analytical reagents and reducing agents Uses: Used in the manufacture of cable sheaths, storage batteries, lead alloys, pigments, ammunition, sulfuric acid production equipment, and can also be used as X-ray protection screens, nuclear reactor equipment, etc. Uses: Used in storage batteries, cables, solders, etc. Uses: Used in cables, storage batteries, babbitt alloys, type alloys, and materials for X-ray protection, etc. Uses: Reducing agent for determining tin; reducing high iron to ferrous iron; used for the separation of iridium from platinum and rubidium; alloy manufacturing Uses: Mainly used in cables, storage batteries, lead smelting, scrap copper smelting, printing, solder, etc.
Application Nickel plating is used in various alloys such as new silver, Chinese silver, German silver; for coins, electronic boards, storage batteries; magnets, lightning rod tips, electrical contacts and electrodes, spark plugs, mechanical parts; catalysts for the hydrogenation of oils and other organic substances. See also Raney nickel. Manufacture of monel metal, stainless steel, heat-resistant steel, heat-resistant and corrosion-resistant alloys, nickel-chromium resistance wire; alloys for electronic and space applications. Use Nickel is used in various alloys such as German silver, monel and nickel-chromium alloys; for coins; coins, metals, etc. In storage batteries; in spark plugs; and as a hydrogenation catalyst. Preparation Nickel is obtained by processing sulfide and laterite ore concentrates using pyrometallurgical and hydrometallurgical processes. The nickel matte powder obtained by roasting and smelting is further cleaned by electrometallurgical, steam and hydrometallurgical refining methods. A portion of the matte surface is baked to obtain commercially available nickel oxide agglomerates. 99.9% pure nickel can be obtained by electrolytic refining process. The purest nickel (99.97%) is obtained by vapor metallurgy. In this process, also known as the Mond Chemicalbook process, a mixture of nickel and copper sulfide is converted into oxides and then reduced by heating with water vapor at 350â??400 �° C. The resulting active form of nickel is treated with carbon monoxide to obtain volatile nickel carbonyl [Ni (CO) 4]. The reaction of the latter is reversible. Heating produces pure nickel and carbon monoxide. Overview Nickel is a slightly yellowish silvery-white metal, hard, easy to polish, magnetic (not as good as iron and cobalt) and good plasticity. Density 8.902g/cm3, melting point 1453 �° C, boiling point 2732 �° C. The chemical properties are relatively active. It has good corrosion resistance, is difficult to oxidize in air at room temperature, is not easy to react with concentrated nitric acid, and can resist alkali corrosion. Fine nickel wire is flammable, reacts with halogens when heated, and slowly dissolves in dilute acid. It can absorb a considerable amount of hydrogen. It is mainly used to make various alloys composed of iron, copper, zinc and other metals, and is widely used in cutting-edge technology, high-temperature ceramic products, corrosion-resistant alloys, chemical equipment, electronic and electrical equipment, special utensils, glass and other industries. Adding nickel to steel can improve the toughness and corrosion resistance of steel, such as nickel steel, chrome-nickel steel, etc.
(1) Regular power graphite electrode( RP grade Graphite Electrode) . Graphite electrode with current density less than 17a / cm2 is allowed to be used in common power electric furnaces for steelmaking, silicon smelting and yellow phosphorus smelting.
(2) Oxidation resistant coating graphite electrode. A graphite electrode coated with an anti-oxidation protective layer (graphite electrode anti oxidant). The formation of both conductive and high temperature oxidation resistant protective layer can reduce the electrode consumption (19% ~ 50%), prolong the service life of the electrode (22% ~ 60%), and reduce the electric energy consumption of the electrode. The popularization and application of this technology can bring such economic and social effects as follows: 1. The unit consumption of graphite electrode is less, and the production cost is reduced to a certain extent. For example, according to the consumption of 35 graphite electrodes per week and 165 refining heats of LF refining furnace in a steel-making plant without shutdown in the whole year, 373 (153 tons) electrodes can be saved every year by using graphite electrode oxidation resistance technology, and RMB 2585700 can be saved by RMB 16900 per ton of ultra-high power electrode per year. 2 The graphite electrode consumes less electricity, saves the unit electricity consumption of steelmaking, saves the production cost, saves energy! 3. Because the graphite electrode is replaced less times, the labor amount and risk coefficient of operators are reduced, and the production efficiency is improved. 4 Graphite electrode is a high consumption and high pollution product, which has a very important social significance in the days of promoting energy conservation, emission reduction and environmental protection. This technology is still in the stage of research and development in China, and some domestic manufacturers have begun to produce it. It is widely used in Japan and other developed countries. At present, there are also companies that import the anti-oxidation protective coating in China.
(3) High power graphite electrode (HP grade Graphite Electrode). Graphite electrode with current density of 18-25a / cm2 is allowed to be used in high power electric arc furnace for steelmaking.
(4) Ultra high power graphite electrode( UHP grade Graphite Electrode). Graphite electrode with current density greater than 25A / cm2 is allowed. It is mainly used in ultra high power EAF.
Cast Iron and Ductile Iron tube and fittings PL739
Cast Iron and Ductile Iron tube and fittings can be offered by our comapny to meet different engineering needs.
The difference between ductile iron and gray iron
1. Different chemical composition
Nodular cast iron contains nodular graphite, which can improve its toughness and strength, while reducing brittleness. Gray cast iron contains a lot of carbon, so that its hardness and wear resistance is high, but the toughness is poor.
2. Different organizational structures
The structure of nodular cast iron contains nodular and ferrite, and the distribution of nodular is uniform. While the structure of gray cast iron is mainly ferrite and pearlite, and the distribution of pearlite is uneven.
3. Different performance
Ductile iron has high strength and toughness, and has good corrosion resistance. It is uitable for the manufacture of high load and high pressure parts. The hardness and wear resistance of gray cast iron are high. It is suitable for the manufacture of friction and wear parts.
Application field
Cast iron : because of its low strength and good vibration resistance. It is often used in the production of parts under compressive stress, such as box, base, etc.
Ductile iron : because of its high strength and good toughness. It is often used in the manufacture of parts requiring high strength and toughness, such as crankshaft, connecting rod and so on.
