What is ASTM b488?

This specification establishes the requirements for electrodeposited gold coatings for engineering applications, employed specifically for their corrosion and tarnish resistance (including resistance to fretting corrosion and catalytic polymerization), bondability, low and stable contact resistance, solderability, and …

What is a MIL of gold?

Comparison Reference for Microinches For our industry, 1 microinch is commonly referred to as 1 mil. Most electroplated costume jewelry ranges from 4 mils to 10 mils. The legal definition of electroplate is a minimum thickness of 7 mils of 10kt Gold.

What is hard gold plating?

Hard gold plating is a gold electrodeposit that has been alloyed with another element to alter the grain structure of the gold. Soft gold plating is the highest purity gold electrodeposit; it is essentially pure gold without the addition of any alloying elements.

What are the specifications of the ASTM B488?

ASTM B488 SPECIFICATIONS Purity Type I – 99.9 % Gold Minimum, Hardness Grade A, B, or C Type II – 99.7 % Gold Minimum, Hardness Grade B, C, or D Type III – 99.0 % Gold Minimum, Hardness Grade A only Hardness Grades Grade A – Knoop Hardness 90 Max. Grade B – Knoop Hardness 90-200 Grade C – Knoop Hardness 30-200 Grade D – Knoop Hardness 201 Min.

Which is the best ASTM for gold plating?

ASTM B488: TYPE I,II,III GRADE A AND C, AMS 2422, MIL-G-45204: TYPE I,II,III GRADE A AND C, MIL-DTL-45204 Accurate Precision Plating (APP) is a leading metal finishing services company, specializing in high quality, precision 24-karat gold plating services for aluminum, steel, and a variety of other materials for industrial applications.

What are the hardness grades for gold coating?

If the hardness grade for the gold coating is not specified, Type I shall be furnished at hardness Grade A (90 Knoop max) and Type II shall be furnished at hardness Grade C (130 to 200 Knoop) Underplate Requirements per section 6.3: a copper, nickel, or copper plus nickel underplate may be used, depending on the application and the environment.

What are the Mil-g-45204 gold plating specifications?

Gold plating compliant to these specifications is also provided in different purity types – II, III, and I – as well as in a variety of hardness grades, ranging from 90 knoop to 201 knoop. Our gold plating services cater to a wide range of industries and we have previously worked with the electronics and aerospace.