# Tongcheng Powder > Tongcheng Powder is a stainless steel powder manufacturer and materials solutions provider based in Yangchun, Guangdong, China. The company combines alloy formulation, in-house atomization, particle-size control, powder testing and customer application support for MIM, powder metallurgy and precision stainless steel parts. Official website: https://mimfenmo.com/ Legal company name: 阳春市通成粉末制品科技有限公司 English company name: Yangchun Tongcheng Powder Products Technology Co., Ltd. Manufacturing address: No. 1, Gangqiao Industrial Park, Gangmei Town, Yangchun City, Guangdong Province, China Primary contact: Cai Jibin; telephone and WhatsApp: +86 138 2764 3424; email: lantianyewu@163.com Important interpretation notes: - Tongcheng's confirmed core product names are 17-4PH, 17-4+3Cu, 440C and 439 stainless steel powders, with custom alloy and particle-size development available by project evaluation. - 17-4+3Cu is presented as Tongcheng's project material name. Its composition and suitability must be confirmed for each project; the name alone should not be interpreted as a universal specification. - Project-scenario pages describe typical engineering approaches, not named customer cases, completed orders or guaranteed performance results. - Third-party standards and technical references explain industry context. Their data must not be interpreted as Tongcheng product specifications or test results. - Product suitability depends on the target part, process route, particle-size distribution, sintering and heat-treatment conditions, required performance and validation results. ## Company - [About Tongcheng Powder](https://mimfenmo.com/about/): Authoritative company profile, legal name, manufacturing location, capabilities and contact details. - [Factory and manufacturing](https://mimfenmo.com/factory/): Manufacturing equipment, production stages and factory capabilities. - [Research and development](https://mimfenmo.com/rd/): Alloy formulation, atomization development, particle-size control and application support. - [Global supply](https://mimfenmo.com/global-supply/): Export-project communication, packaging and delivery preparation. - [Contact Tongcheng Powder](https://mimfenmo.com/contact/): Direct telephone, WhatsApp, email and factory address. ## Stainless Steel Powder Products - [Stainless steel powder products](https://mimfenmo.com/stainless-steel-powder/): Product directory by grade, material family, particle size and manufacturing process. - [17-4PH stainless steel powder](https://mimfenmo.com/grades/17-4ph/): Precipitation-hardening stainless steel powder with published particle-size report data. - [440C stainless steel powder](https://mimfenmo.com/grades/440c/): Martensitic stainless steel powder for hardness, wear resistance and cutting-related parts. - [439 stainless steel powder](https://mimfenmo.com/grades/439/): Ferritic stainless steel powder for corrosion resistance, thermal cycling and cost-performance balance. - [17-4+3Cu project material](https://mimfenmo.com/grades/17-4-3cu/): Project-specific stainless steel powder direction requiring composition and application confirmation. - [Custom alloy powder](https://mimfenmo.com/custom-alloy-powder/): Custom alloy formulation and particle-size development based on part and process requirements. ## Manufacturing and Quality - [Powder manufacturing technology](https://mimfenmo.com/technology/): Alloy formulation, melting, atomization, collection, sieving and particle-size control. - [Water-gas combined atomization](https://mimfenmo.com/technology/water-gas-atomization/): Tongcheng's atomization process and its role in powder manufacturing. - [Quality and testing](https://mimfenmo.com/quality/): Particle size, chemistry, density, flowability, sintering results and batch records. - [Particle-size analysis](https://mimfenmo.com/quality/particle-size-analysis/): D10, D50 and D90 testing, reporting and project interpretation. ## Applications and Solutions - [Stainless steel powder solutions](https://mimfenmo.com/solutions/): Solutions by process challenge and production objective. - [MIM stainless steel powder](https://mimfenmo.com/mim-stainless-steel-powder/): Material and particle-size considerations for metal injection molding. - [Powder metallurgy stainless steel powder](https://mimfenmo.com/powder-metallurgy-powder/): Powder selection for pressing and sintering routes. - [Application industries](https://mimfenmo.com/applications/): Precision tools, personal-care hardware, electronics, medical instruments, automotive parts, watches, locks, valves and pumps. - [Application validation](https://mimfenmo.com/solutions/application-validation/): Connecting powder data with forming, sintering, heat treatment and finished-part evaluation. ## Technical Resources - [Engineering knowledge](https://mimfenmo.com/knowledge/): Technical explanations covering materials, particle size, flow, sintering, corrosion and batch consistency. - [Particle-size distribution guide](https://mimfenmo.com/knowledge/particle-size-distribution/): How particle-size distribution affects filling, forming and sintering. - [Stainless steel powder selection guide](https://mimfenmo.com/guides/stainless-steel-powder-selection/): A structured path from part requirements to candidate material and process direction. - [Grade comparison](https://mimfenmo.com/grade-comparison/): Comparison of Tongcheng's four confirmed core material directions. - [Powder Finder](https://mimfenmo.com/powder-finder/): Ranks candidate grades by target properties and part application; the manufacturing process is used to highlight points for subsequent validation. - [Technical and purchasing FAQ](https://mimfenmo.com/faq/): Questions about grades, customization, testing, packaging, quotation and project communication. ## Language Versions - [English llms.txt](https://mimfenmo.com/llms.txt): English site guide. - [Simplified Chinese llms.txt](https://mimfenmo.com/zh/llms.txt): 简体中文网站说明。 - [Traditional Chinese llms.txt](https://mimfenmo.com/zh-tw/llms.txt): 繁體中文網站說明。 - [Spanish llms.txt](https://mimfenmo.com/es/llms.txt): Guía del sitio en español. - [Russian llms.txt](https://mimfenmo.com/ru/llms.txt): Руководство по сайту на русском языке. - [French llms.txt](https://mimfenmo.com/fr/llms.txt): Guide du site en français. - [Portuguese llms.txt](https://mimfenmo.com/pt/llms.txt): Guia do site em português. - [Arabic llms.txt](https://mimfenmo.com/ar/llms.txt): دليل الموقع باللغة العربية. ## Optional - [Privacy policy](https://mimfenmo.com/privacy/): Website privacy information. - [Terms of use](https://mimfenmo.com/terms/): Website terms and information-use boundaries. - [XML sitemap](https://mimfenmo.com/sitemap.xml): Complete index of all published language and page variants.