Gold Plating
Silver Plating
Nickel Plating
Electroless Nickel
Tin Plating
Gold Plating


We offer electro-plated gold that conforms to military and aerospace specification. Gold is generally used in electrical applications (such as connector pins) where the low contact resistance is critical. Moreover, Gold is a noble metal, and as such is not subject to oxidation.

We utilize a high capacity vibratory line that allows for plating larger parts while maintaining the advantage of more uniform plating. This process allows for better coverage of inside surfaces and gentler processing of delicate parts.

There are various requirements for minimum purity and hardness, but all our gold processes:

  • Are High Purity – 99%+
  • Are Readily Solderable
  • Have Low Contact Resistance

Our capacity ranges from micro-contacts up to parts 30 inches in diameter. We offer rack/wire as well as conventional and vibratory barrel plating.

General Guidelines:

  • Copper based alloys should be plated with a nickel underplate as a diffusion barrier
  • Gold plate over a silver base material or plate is not recommended due to silver diffusion
Silver Plating


We offer Silver Plating that conforms to the Federal Specification QQ-S-365 as well as many company specifications and the AMS and ASTM specifications.

Our Silver Plating is:

  • Solderable
  • High Purity
  • Highly Conductive (both Electrical and Thermal)

Silver is used in various applications:

  • Electrical (Contact Pins, Buss Bars, etc.)
  • Bearing Surfaces (Silver has excellent lubricity)

As with our other processes, we are capable of processing a wide variety of parts from miniature contacts and parts up to 30 inches. This includes barrel Plating (conventional and vibratory) and racking/wiring.

Nickel Plating


We offer Nickel Plating processes to meet a wide variety of applications.  Nickel can be used as a final plate for corrosion protection or as an undercoat for other processes, such as Gold and Silver.  Nickel ranges in brightness from matte (dull) to bright, depending on the process used.

Typical Processes Include:

Sulfamate Nickel:

  • Semi-Bright Finish
  • Excellent Ductility
  • Low-Stress Deposit
  • Meets requirements of QQ-N-290, AMS-QQ-N-290 and AMS 2404

Bright Nickel:

  • Bright Finish
  • Good Wear Resistance
  • Meets requirements of QQ-N-290 and AMS-QQ-N-290
Electroless Nickel


Electroless Nickel is a hard, wear resistant and corrosion resistant coating used in applications where a uniform thickness is required.  It is useful in service where temperature may reach 1000F. Since the nickel is deposited without current, Electroless Nickel will coat uniformly on complex shapes with recessed surfaces.  Electroless Nickel may also be post-baked to increase hardness.

Tin Plating


We offer bright electro-tin plating that conforms to the military specification MIL-T-10727, Type I – electro-plated.  The finish is smooth, ductile and solderable.

Typical Processes Include:

  • Electrical Components (Buss Bars, etc.)
  • Terminals and Contacts
  • Hardware

We have full barrel and rack/wiring capabilities for Tin Plating. Our equipment is suited for a full range of parts from very small up to 20 inches in length. We are also equipped for most base materials including aluminum, stainless steel, beryllium copper, kovar and invar as well as the common materials (steel, copper, etc.)

PMP

EXPEDITE POLICY

  • All expedites need to be approved first, so please contact us in advance, so we can determine whether the expedite will work within our current production schedule.
  • For a 24 hour expedite – The cost is $100.00 - parts must be received BY NOON and will be completed the following business day after 3:30pm. If parts are received after 12:00 pm, then the order falls into a Same Day Expedite category as noted below.
  • For a Same day expedite – The cost is $250.00 - parts must be received by 8:00 am and will be completed the same business day after 3:30pm (ONLY if relative bake requirements work within this timeline). If parts are received the prior day (after 12:00 pm) the order will be considered a Same Day Expedite

If it is your desire to have an order expedited, please provide a purchase order with the additional expedite charges included, and email this to Jeff@pmplating.com. Otherwise, your order will fall into our normal process which will be 3-5 business days after receipt of your order.

*Please note that all expedite requests must be agreed upon by PMP prior to sending the order to us. Expedite timelines may change to 48 hours or more, depending on the current production schedule, bake requirements, etc. As mentioned above, we need to review our production schedule, plating time and any necessary bake requirements prior to committing to an expedite. We appreciate your understanding!

Specifications

Gold

MIL-G-45204/MIL-DTL-45204

  • Type I - 99.7% minimum purity
  • Type II – 99.0% minimum purity
  • Type III – 99.9% minimum purity
  • Grade A - 90 knoop maximum hardness
  • Grade C - 130 to 200 knoop hardness
  • Grade D – 201+ knoop hardness

ASTM B488

  • Type I - 99.7% minimum purity
  • Type II – 99.0% minimum purity
  • Type III – 99.9% minimum purity
  • Grade A - 90 knoop maximum hardness
  • Grade C - 130 to 200 knoop hardness
  • Grade D – 201+ knoop hardness

AMS 2422

  • 99.0% minimum purity
  • .000050” minimum thickness on significant surface
Silver

QQ-S-365

  • Type I - Matte finish
  • Type II – Semi-bright Finish
  • Type III – Bright finish
  • Grade A - With supplementary anti-tarnish treatment
  • Grade B - Without supplemental treatment

ASTM B700

  • Type 1 - 99.9% minimum purity
  • Type 2 - 99.0% minimum purity
  • Type 3 - 98.0% minimum purity
  • Grade A - Matte finish
  • Grade B - Bright finish
  • Grade C - Bright finish achieved by polishing
  • Grade D - Semi-bright finish
  • Class N - No supplemental anti-tarnish treatment
  • Class S - With supplemental anti-tarnish treatment

ASTM 2410

  • 950F post-bake for 20 to 60 minutes

ASTM 2411

  • 900F post-bake for 2 hours - low alloy steel
  • 1200F post-bake for 2 hours - stainless steel
  • 1400F post-bake for 2 hours – inconel

ASTM 2412

  • 300F to 500F post-bake for 2 hours
Nickel

QQ-N-290 (AMS-QQ-N-290)

  • Class 1 - Corrosion protection
  • Class 2 - Engineering plating
  • Grade A - 0.0016 inch minimum thickness
  • Grade B - 0.0012 inch minimum thickness
  • Grade C - 0.0010 inch minimum thickness
  • Grade D - 0.0008 inch minimum thickness
  • Grade E - 0.0006 inch minimum thickness
  • Grade F - 0.0004 inch minimum thickness
  • Grade G - 0.0002 inch minimum thickness

ASTM B689

  • Type 1 - No additives
  • Type 2 - Additives allowed
  • Type 3 - SIC, WC or AlO added
  • Class 5 - 0.0002 inch minimum
  • Class 25 - 0.0010 inch minimum
  • Class 50 - 0.0020 inch minimum
  • Class 100 - 0.0040 inch minimum
  • Class 200 - 0.0080 inch minimum
  • Class X - X is specified (X is thickness of Nickel measured in Microns)

AMS 2403

  • General Purpose Nickel

AMS 2423

  • Hard Deposit Nickel

AMS 2424

  • Low Stress Deposit (Sulfamate Nickel)
Electroless Nickel

MIL-C-26074, AMS-C-26074

  • Grade A - 0.001 inch thickness minimum
  • Grade B - 0.0005 inch thickness minimum
  • Grade C - 0.0015 inch thickness minimum
  • Class 1 - As deposited, no post bake
  • Class 2 - Post bake 500F for 4 hours minimum – Steel
  • Class 3 - Post bake 375F for 1 to 1.5 hours – aluminum
  • Class 4 - post bake 250F for 1 to 1.5 hours – aluminum

ASTM B733

  • Type IV - 5% to 9% Phosphorous

Service Class

  • SC0 - 4 micro inch minimum
  • SC1 - 0.0002 inch minimum
  • SC2 - 0.0005 inch minimum
  • SC3 - 0.0010 inch minimum
  • SC4 - 0.0030 inch minimum

AMS 2404

  • Class 1 - No Heat Treat
  • Class 2 - 450F Post-Bake for 4 Hours Minimum - Steel
  • Class 3 - 375F Post-Bake for 1 to 1.5 Hours - Aluminum
  • Class 4 - 250F Post-Bake for 1 to 1.5 Hours - Aluminum

Post Heat Treat

  • Class 1 - As Deposited – No Heat Treat
  • Class 2 - 500F Heat Treat for 20 hours - Steel
  • Class 3 - 375F Heat Treat for 2 to 4 hours - Steel
  • Class 4 - 250F Heat Treat for 1 hour - Aluminum
  • Class 5 - 295F Heat Treat for 1 hour - Aluminum and Copper
  • Class 6 - 590F Heat Treat for 1 hour - Titaniun
Tin

MIL-T-10727

  • Type I - Electro-Plated

ASTM B545

  • Class A - 100 micro inches
  • Class B - 200 micro inches
  • Class C - 320 micro inches for copper / 400 micro inches for ferrous alloys
  • Class D - 600 micro inches for copper/800 micro inches for ferrous alloys
  • Class E - 1200 micro inches
  • Class F - 60 micro inches

AMS 2408

  • 2408-1 - 100 to 300 micro inches
  • 2408-2 - 200 to 400 micro inches
  • 2408-3 - 300 to 500 micro inches