Overview
Tungsten metals, often referred to as wolfram, are a group of heavy metals renowned for their exceptional physical properties. Tungsten has the highest melting point of all metals, making it indispensable in high-temperature applications. It is also one of the densest metals, surpassed only by a few elements like gold and platinum. Historically, tungsten was first isolated in the 18th century and quickly found use in filaments for incandescent light bulbs. Today, its applications span multiple industries, from electronics to aerospace, due to its unique combination of hardness, thermal stability, and electrical conductivity.
Physical and Chemical Properties
Tungsten exhibits remarkable physical properties, including a melting point of 3422°C and a boiling point of 5555°C, the highest among all metals. Its density of 19.25 g/cm³ makes it one of the heaviest metals, comparable to uranium and gold. Tungsten is also highly resistant to corrosion and maintains its strength at elevated temperatures. Chemically, tungsten is relatively inert under standard conditions but can react with oxidizing agents at high temperatures. It forms a protective oxide layer when exposed to air, which enhances its resistance to further oxidation. Tungsten is insoluble in water and most acids, though it can dissolve in a mixture of nitric and hydrofluoric acids.
Main Applications
Tungsten metals are critical in numerous industrial applications. In electronics, tungsten is used in contacts, electrodes, and semiconductor substrates due to its excellent electrical conductivity and thermal stability. The aerospace industry relies on tungsten for high-temperature components and radiation shielding. Another major use is in cutting tools and wear-resistant parts, where tungsten carbide (a compound of tungsten and carbon) is the material of choice. Tungsten is also alloyed with steel to produce high-speed tools and superalloys. Additionally, it remains vital in lighting, though less so for incandescent bulbs today, and more for specialized lighting like halogen lamps and X-ray tubes.
Safety and Storage
While tungsten is generally safe in bulk form, tungsten powder can pose health risks if inhaled, causing respiratory irritation. Proper handling includes using dust masks and ensuring adequate ventilation in workplaces where tungsten dust is generated. Storage of tungsten metals requires a dry environment to prevent oxidation, especially for powdered forms. Containers should be sealed and, if possible, filled with an inert gas like argon to maintain purity. Long-term storage of tungsten products should avoid exposure to moisture and corrosive chemicals.
B2B Procurement Guide
When procuring tungsten metals, buyers should prioritize purity levels, which typically range from 99.5% to 99.95% for industrial applications. The form of tungsten—whether powder, wire, rods, or ingots—should match the intended use, with powder being common for alloys and solid forms for machining. Supplier reliability is crucial; look for certifications like ISO 9001 and check for traceability of raw materials. Pricing varies based on market demand, purity, and form, with bulk purchases often securing discounts. Lead times can be significant for specialized forms, so plan procurement accordingly.
Related Manufacturers
- 主营：等离子喷涂、超音速喷涂、热喷涂、碳化钨、金属表面处理、陶瓷喷涂、热喷涂加工
- 主营：花生酸、碳酸钠、单氟磷酸钠、丁基羟基茴香醚、鱼大豆酵母原料
- 主营：氧化铝、镍铁粉、白铅粉、钨铁粉、二硫化钨、氧化硼、锰铁粉、硅铁粉、二氧化锆、氧化钛粉、球形磁粉、雾化铜粉、钒铁粉末、氧化铋粉、钛铁合金、三氧化钼、氧化镁粉、三氧化二、氧化钴粉、耐火材料、氧化铬绿、纳米氧化钛、纳米氧化锌、球形磁铁粉、四氧化三铁
- 主营：硫酸钡、碳酸钙、硅溶胶、钨酸制造金属钨、苄基胂酸、甲基磺酸、氨基磺酸、正硅酸乙酯、多聚甲醛
- 主营：锑靶材、铪靶材、铒靶材、钨靶材、镧靶材、铑靶材、镍靶材、硒化锑、氟化镱、钽靶材、镉靶材、铬靶材、钼靶材、钇靶材、氟化镁、铽靶材、钆靶材、铝靶材、硒靶材、硼靶材、钐靶材、ATO靶材
- 主营：离子注入件、真空炉加热室、坩埚、钨钼钽铌锆、钨钼异型件、钨绞丝、钨舟、钨铜合金、钨镍铁、钨镍铜、加热带、隔热屏、螺丝螺母、紧固件、钼电极杆、加工件、炉胆配件、颗粒、靶材、镍带、钼镧合金、高比重合金
- 主营：钨合金球、钨加热子、高纯度钨板、碱洗面磨光钨板、热电保护管
- 主营：浮锡灵、铜萃取剂、氧化石蜡皂、钨酸、铜矿活化剂、硫化锡矿石、苯乙烯膦酸、稀土矿捕收剂、锡石细泥捕收剂、表面活性剂、美狄兰捕收剂、中间体、橡胶助剂、uv助剂、光引发剂
- 主营：模具钢材、高速钢、高速钢刀具、钨钢模具钢、钨钢合金、钨钢棒、高硬度钨钢、YG15钨钢、钨钢料、粉末高速钢、w6高速钢、m35高速钢、高速钢圆棒、高速钢圆钢、硬质合金钢、s136模具钢、2367模具钢、h13模具钢、8566模具钢、真空热处理加工
- 主营：合金碳化钨粉、铬铁粉末、低碳铬铁粉
- 主营：漂白粉、茶皂素、噻霉酮、工业级钨酸、浮选油、草酸铵、戊二醛、苯甲醇、磺化油、漂粉精、氟化钠、三甘醇、碳酸钙、白僵菌、松醇油、碳酸钡、黄糊精、雷米邦a、号全精炼、杀菌剂bit、三乙醇胺、牛骨发酵、快干水泥、多聚甲醛、次氯酸钠、羟基乙叉
- 主营：黄丹粉、707乳液、棕榈酸、钨酸厂家、防腐剂、苯丙乳液、磷脂三苯、丙烯酸酯、叉二磷酸、多聚化学、硬脂酸铝、二甲戊灵、防静电剂、茉莉酮酸、氨基丁酸、对碘甲苯、硫酸亚铁、甲基硅油、磷酸二氢钠、密封固化剂、种子润滑剂、碱性蛋白酶、对氟苯甲醛、硬脂酸甘油酯、丙烯酸乙二醇、甲基二乙醇胺
- 主营：废水银、钽材料、盾构齿、钨合金、废钨钢、黑色金属、钨钢刀片、废弃金属、回收钨粉、钴合金、高速钢、落地粉、镍合金、钼顶头、废钼丝、刨花屑、回收合金、纯钼材料、回收钼粉、回收铍铜、回收废钼、铍铜模具、回收纯钛、回收钼丝、模具回收
- 主营：高速钢回收、锡回收、镍回收、钨回收、钼回收、钛回收