# Solder & Brazing Powders Source: https://powdchem.com/products/metal-alloy-powders/solder-brazing-powders/ Page type: Material category Metals & alloy powders Solder and brazing alloy powder inquiries for joining and electronic assembly. Define alloy composition, powder class and the actual supplied form. [Browse 4 materials]() [Ask about supply]() [Image: Powder material specimens; appearance reference]() ## Choose a material ### Tin-based solder powders Choose Sn-Ag-Cu (SAC), Sn-Bi or Sn-Cu, then the exact alloy ratio and particle distribution. Powder and ready-made solder paste are different supplied forms. #### Tin-silver-copper solder powder tin-silver-copper (Sn-Ag-Cu / SAC) solder alloy powder; exact grade ratio required [Selection guide]() [Ask about this material]() Sn-Ag-Cu system #### Tin-bismuth solder powder tin-bismuth (Sn-Bi) solder alloy powder; exact grade ratio required [Selection guide]() [Ask about this material]() Sn-Bi system #### Tin-copper solder powder tin-copper (Sn-Cu) solder alloy powder; exact grade ratio required [Selection guide]() [Ask about this material]() Sn-Cu system ### Silver-copper brazing powder Give the Ag/Cu composition, joining materials and process. Include any required particle-size classification and its stated standard or method. #### Silver-copper brazing powder silver-copper (Ag-Cu) brazing alloy powder; exact grade ratio required [Selection guide]() [Ask about this material]() Ag-Cu system ## Material selection guide Start with the material identity and process, then check the details on the proposed datasheet. **Alloy & joining task** Specify the solder/brazing alloy, composition limits, substrate and intended joining process. Keep the alloy chemistry distinct from the flux system. **Particle & surface** State particle-size class or distribution with its standard/test basis, morphology, oxygen and storage requirements. **Supply form** Loose powder, flux-containing paste and cored wire are different products. Identify the form required before discussing packaging and quotation. ## Before you choose **Is solder powder the same as a ready-to-use solder paste?** No. A paste includes a flux/vehicle system and formulation requirements. If you need loose alloy powder, specify that form explicitly along with its particle class. **What does this directory cover?** Finished paste, flux and wire are not silently substituted for loose powder. Material and destination conditions are reviewed before supply terms are agreed. ## What to include in your request A material name or reference datasheet is enough to start. Add any requirements you already know. - Alloy designation and elemental limits - Particle-size class/distribution and method - Powder versus paste/wire requirement - Joining process, substrate and storage needs ### Quantity, samples and documents Nike has no fixed minimum order. Tell us the quantity you need; we’ll check supplier pack sizes and any minimums. We’ll check the proposed grade, sample options, delivery timing and available batch documents. Include any essential COA, TDS or SDS requirements. [How we coordinate documents]() [Samples and testing]() [Send a material request]() ## Applications to explore. [**Coatings & Powder Metallurgy**Metal, alloy and composite powder inquiries for spray, compaction, sintering and additive processes, matched to the equipment and feedstock requirements.]() [**Electronics & Semiconductor Materials**Specialty compound, high-purity oxide and functional powder sourcing for electronic and optoelectronic material development.]() ## Related material families. [**Copper Alloy Powders**6 material directions]() [**Precious Metal Powders**7 material directions]() [**Non-Ferrous Metals**10 material directions]()