Plating & metallizing · finish comparison
Silver Plating vs Solder Alloy Plating
Silver Plating and Solder Alloy Plating are both electroplating & electroless plating finishes; silver plate resists corrosion better.
Silver Plating
Electroplating & electroless plating · $$$$ · instant quote
Silver plating provides the highest electrical and thermal conductivity of common plated metals.
Solder Alloy Plating
Electroplating & electroless plating · $$
Solder plating deposits tin-lead or lead-free tin-alloy material on terminals, busbars, lids, and machined electronic parts to provide a controlled solderable surface.
When to choose which
Choose Silver plate
Choose Silver plate when high-current conductivity and solderability are both required.
- Excellent electrical and thermal conductivity
- Typical 5–20 µm engineering thickness
- Good solderability and high-current contact performance
Choose Solder plate
Solder plate is the pick when its strengths below matter more than Silver plate's.
- Supplies a ready-solderable 5–25 µm surface
- Alloy can match the assembly solder process
- Reflow can verify wetting and homogenize deposit
What the numbers say
- Silver plate resists corrosion better.
- Silver plate is the harder surface (60–200 HV vs 10–30 HV).
- Solder plate is the lower-cost option ($$).
Scores side by side
Each score is 0–100 against every finish in this catalog. Corrosion is derived from salt-spray test duration and surface hardness from the finish layer's Vickers hardness where a measured figure exists; a finish that leaves the base metal's own surface is not rated for hardness. Cosmetic, lubricity and cost are FabDigit's engineering assessment. Scores and typical figures are screening data, not matched side-by-side tests or service-life rankings; ASTM B117 is a controlled salt-fog method, not a field-life prediction.
| Score | Silver plate | Solder plate |
|---|---|---|
| Corrosion resistance | 55 Good | 42 Fair |
| Surface hardness / wear | 39 Fair | 9 Minimal |
| Cosmetic quality | 72 Very good | 35 Fair |
| Lubricity | 42 Fair | 35 Fair |
| Cost | 82 $$$$ | 30 $$ |
Key numbers
| Property | Silver plate | Solder plate |
|---|---|---|
| Thickness | 5–20 µm | 5–25 µm |
| Surface hardness | 60–200 HV | 10–30 HV |
| Electrical | Conductive | Conductive |
| Colours | silver | silver gray |
| Relative cost | High ($$$$) | Standard ($$) |
| Added lead time | 4–8 working days | 4–8 working days |
| RoHS | Compliant | Restricted |
| Instant quote | Yes | On request |
Bold marks the side that is ahead on a row where more (or less, for cost and lead time) is better. Ranges are the typical specification window; the drawing call-out fixes the class.
Which materials take each finish
| Material family | Silver plate | Solder plate |
|---|---|---|
| Brass | Yes | Yes |
| Copper Alloy | Yes | Yes |
| Nickel Alloy | Yes | — |
| Aluminum | With care | Limited |
| DMLS / SLM | With care | Limited |
| Stainless Steel | With care | Limited |
| Steel | With care | With care |
| Zinc Alloy | With care | Limited |
| Magnesium Alloy | Limited | No |
| Polymer | Limited | No |
| SLA | Limited | No |
| Titanium | Limited | No |
Specifications and drawing call-outs
Silver plate
- ASTM B700 — Standard Specification for Electrodeposited Coatings of Silver for Engineering Use
SILVER PLATE PER ASTM B700, TYPE I, GRADE A, 0.0005 IN MIN ON CONTACT SURFACES; NICKEL UNDERPLATE 0.0002 IN MIN; NO ANTITARNISH
Solder plate
No governing public specification — called out by name and thickness.
LEAD-FREE Sn-0.7Cu SOLDER PLATE, 10–15 µm, OVER 2.5 µm MIN NICKEL UNDERPLATE; REFLOW AND VERIFY SOLDERABILITY PER CUSTOMER SPECIFICATION; RoHS COMPLIANT
Silver plate vs Solder plate — frequently asked
What is the difference between Silver plate and Solder plate?
Silver Plating and Solder Alloy Plating are both electroplating & electroless plating finishes; silver plate resists corrosion better. Silver plate is the harder surface (60–200 HV vs 10–30 HV). Solder plate is the lower-cost option ($$).
When should I use Silver plate instead of Solder plate?
Choose Silver plate when high-current conductivity and solderability are both required.
Is Silver plate or Solder plate cheaper?
Solder plate is the lower-cost finish ($$ against $$$$ for Silver plate) among the finishes FabDigit quotes. Both are priced per part with a lot minimum; the exact figure appears on the instant quote once the part is uploaded.