INTA Technologies Corporation 2281 Calle de Luna, Santa Clara, CA 95054 || Tel: 408-748-9955 || Fax: 408-727-3027

 

 

 

 

Tin Plating

 

 

 

Table of Contents

 

 

 

 

What is tin plating used for?

Tin plating in mainly used to improve solderability. Some material types are unsolderable but once they are tin plated they can be easily soldered. Tin is a soft coating and fairly ductile. Tin has useful electrical properties and conducts electricity very well.

 

Tin (Sn)

Thermal Conductivity (W/mK) 65

Density (gm/cc) 7.28

CTE (ppm/deg C) 20

 

Some popular tin braze and solder alloys include:

Gold Tin

Silver Tin

Bismuth Tin

Indium Tin

 

INTA Technologies Corp. is RoHS compliant and does not work with tin alloys containing lead. We also do not accept lead substrates or lead plated substrates into the facility.

 

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What type of tin plating does INTA Technologies offer?

INTA Technologies offers MIL-T-10727C Type I only (electrodeposited). INTA does not offer Type II (hot-dipped). INTA’s workmanship guarantees “the coating shall be lustrous, smooth, fine-grained, adherent, and free from blisters, pits, nodules, indications of burning and other defects.” (Mil-T-10727C 3.8)

 

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Is tin plating costly?

No, tin plating is cost-effective and affordable, especially in high volume. In low volume the prices are higher.

 

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I only have a few small items to be tin plated, can INTA help?

Yes, we fulfill large and small orders.

 

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What information should I put on my drawing?

There should be notes on the drawing which include the following:

 

1)    Approved plating source:

INTA Technologies Corp

2281 Calle de Luna

Santa Clara, CA 95054

408-748-9955

408-727-3027 fax

 

2)    Indicate areas to be plated. Full coverage is preferred, selective plating is much more costly (labor/machine intensive). Also indicate critical surfaces (if applicable).

3)    Indicate plating spec MIL-T-10727C Type I

 

4)    Indicate thickness desired (contact sales@intatech.com for assistance)

 

5)    Indicate approved/allowable undercoats (example: nickel, copper, silver)

 

6)    Include bake test 215 o C +/- 15 o for a minimum of 30 minutes post-plating

 

7)    Indicate a workmanship standard such as: “The coating shall be lustrous, smooth, fine-grained, adherent, and free from blisters, pits, nodules, indications of burning and other defects” (MIL-T-10727C 3.8)

 

8)    XRF printout required for coating thickness documentation with each lot

 

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What thickness should be specified on the print?

Thickness depends on the exact application. Contact B.Kneedler, Engineering Estimator 408-748-9955 x113 for assistance.

 

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What formats of drawings can INTA read?

INTA Technologies can read most CAD and document formats. Send the drawings to sales@intatech.com and include desired quantities. We will contact you with questions and/or comments/feedback.

 

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Is INTA Technologies a good sole source for tin plating?

Yes, INTA Technologies is an excellent sole source for many products and services including tin plating. It is best to specify INTA Technologies Corp. as sole source for finishing (plating services) on the drawing and any applicable specifications to eliminate any future quality or on-time delivery issues.

 

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What is the lead time for tin plating services?

The standard lead time is five (5) business days.

 

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Can large items be tin plated?

INTA Technologies specializes in small and medium sized items. Items over 10” in length or diameter may be too large. Contact INTA to discuss the size of your part sales@intatech.com

 

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Can INTA plate very small items?

Yes, INTA readily plates tiny components smaller than 1mm (.040”).

 

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What type of materials can be tin plated?

Almost all types of material except lead, cadmium and a few others.

 

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What color is the final finish?

Dull, matte, metallic.

 

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What surface finish is appropriate for tin plating?

Surface finish is unimportant (Ra) although a smoother finish is preferred for plating.

 

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What applications need tin plating?

Many applications use tin plating such as electronics, circuit boards, automotive and many other industries. Tin plating is mainly used as a soldering precursor.

 

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Who can I contact to discuss my project and plating ideas?

Contact B.Kneedler, Estimator 408-748-9955 x113

 

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Last revised: 17 APR 2008