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ASM Material Finishes and Notes



1No finishNO FINISH
2Anodized (Dk. Gray)ANODIZE-MIL-A-8625F, Type II - Class 2 - (Sulphuric) Hot Water Seal. (Dk. Gray)
3Anodized (Clear)ANODIZE-MIL-A 8625F, Type II - Class I - (Sulphuric) Hot water Seal. (Clear)
3aAnodized (Blue)ANODIZE-MIL-A-8625F, Type II - Class 2 - (Sulphuric) Hot Water Seal. (Blue)
3bAnodized (Red)ANODIZE-MIL-A-8625F, Type II - Class 2 - (Sulphuric) Hot water seal (Red)
4Anodized (Yellow Green)ANODIZE-MIL-A-8625F, Type II - Class 2 - (Sulphuric) Dichromate Seal (Yellow Green)
4aAnodized (Dichromate)ANODIZE-MIL-A-8625F- Type II (Sulphuric) Dichromate Seal (Red)
4bAnodized (Dyed Gold)ANODIZE - MIL-A-8625F-Type II Class 2 (Dyed Gold)
5Anodized (Black)ANODIZE-MIL-A-8625F, Type II - Class 2 Hot water Seal (Black)
6Cadmium Plate ClearCADMIUM PLATE QQ-P-416-F-Type I-Class 2-Clear Chromate
6aCadmium Plate ColorCADMIUM PLATE, QQ-P-416-F-Type II- Class 2 Color Chromate Finish"
7Cadmium Commercial Plate,CADMIUM PLATE COMMERCIAL - Type I, Class 3
8Cadmium Color Chromate PlateCADMIUM PLATE QQ-P-416-F-Type II - Class 3 - Color Chromate Finish
9Nickel Plate, Grade GNICKEL PLATE - QQN-290-A-Class 1, Grade G, (thickness - .0002- SB) (single layer coating fully bright)
9aNickel Plate, Grade FNICKEL PLATE - QQN290-A Class 1, Grade F (Thickness -.0004-SB) (single layer coating fully bright)
10Silver PlateSILVER PLATE - QQ-S-365-D, Type II - Grade B (Thickness -.0003)
11Black oxide, Class 4BLACK OXIDE - MIL-C-13924-C-AMEND #1 Class 4. For 300 series corrosion resistance steel alloys only.
11aBlack oxide, Class 1BLACK OXIDE - MIL-C-13924-C-AMEND #1 - Class 1 (for plain carbon and low alloy steels)
12Passivate, Type IPASSIVATE - MIL-F-14072-C (ER) AMEND #1 - Type I. (Finish #E300 - Passivate per ASTM-A-380-96)
12aPassivate, Type IIPASSIVATE QQ-P-35C, Type II."
15Alodine 1200ALODINE 1200
16Gold FlashGOLD FLASH, (Thickness -.00003 to .00005.)
17Gold Flash over NickelGOLD FLASH over Nickel Flash, (Thickness - .00003 to .00005)
18Gold PlateGOLD PLATE MIL-G-45204-C-AMEND #1, Type 11 - Grade C - Class-2 (Thickness .0001 0 minimum)
19Tin Plate IITIN PLATE (Hot dipped) MIL-T-10727-C, Type II
20Tin Plate IITIN PLATE (Electro Deposit) MIL-T-10727-C, Type I
20aTin Plate I (solderable)TIN PLATE (Electro Deposit) MIL-T-10727-C, Type I plus solderability ASTM B 545-92, Class-C"
21Bright Dip BrassBRIGHT DIP (Brass Finish)
22IRIDITE (Clear)IRIDITE - MIL-C-5541-E-Class 3 (clear)
1aIRIDITE (Gold)IRIDITE - MIL-C-5541-E-Class la (Gold)
24Gold Flash over SilverGOLD FLASH 0.000015 thick over Silver-Plate (0.0003 thickness)
26Chomium BrightCHROMIUM PLATING - QQ-C-320B (Bright finish) Class 1, Type I
27Chromium SatinCHROMIUM PLATING - QQ-C-320B (Satin Finish) Class 1, Type II
28Chromium EngineeringCHROMIUM PLATING QQ-C-320-B (Engineering), Class 2
29Clear LacquerCLEAR LACQUER
30Water Dip LacquerWATER DIP LACQUER
31Zinc Plate Type IZINC PLATE - ASTM B633/85 Type I - Class FE/ZN5-SC-1 (thickness .00025)
31aZinc Plate Type IIZINC PLATE - Colored Chromate - ASTM B633/85 Type II - FE/ZN5- SC-1 (thickness -.00025)
31bZinc Plate Clear
31dZinc Plate PhosphateZINC PLATE - (Phosphate Coat) -ASTM B633/85 Type V Class FE/ZN5-SC-1 (thickness .00025)
31eZinc Plate OliveZINC PLATE - per QQ-Z-325 Type II, olive drab.
32Solder Plate.0001 to -.0003 Thick. Solder per QQS-571-F, SN 60 PG 40 over Nickel Plate thickness 0.0001-0.0005. In AC/W MILP-81728A plus solderability
34Black Phosphate
35Black Zinc
37Black FinishUsed on steel parts - strictly cosmetic
38Electro Tin PlateOver COPPER FLASH - MIL T - 10727C Type I
39Lubricant, Type ISolid Film - Heat cured - corrosion inhibiting - MIL-L-460101-AMEND #2, Type I, cure temperature of 150 ±3 º C.
39aLubricant, Type IISolid Film - Heat cured - corrosion inhibiting - MIL-L-460101B-AMEND #2, Type II, cure temperature of 204 ±3 º C.
40Electro PolishNo military specification assigned - An electric process used to remove the outer layer of material to brighten primarily steel-stainless steel and brass alloys.

RECOMMENDED FINISHES


ALUMINUM

Anodize Finishes - (2,3,3a,3b,4 and 4a): Anodized finishes are intended to provide corrosion resistance, improve paint adhesion and abrasion resistance, for aluminum and aluminum alloy parts. Good dielectric properties.

Anodize (Hard) Finishes - (5): Color will vary from light tan to black depending on alloy and thickness. Provides very hard ceramic type coating. Good dielectric properties. Corrosion resistance is good.

Caution: (-5) Anodize finishes are recommended on aluminum alloys of 1/2" in diameter or greater due to the higher current required to apply said coating.

Silver Plated Finish (-10): Use on aluminum to enhance conductivity.

Alodine - (15): Provides protection and corrosion resistance. For aluminum and aluminum alloys.

lridite - (22): Primarily used for protection against corrosion where lower electrical resistance is required. Will improve adhesion of paint systems on aluminum and aluminum alloys.

Lubricant - Solid Film - Heat Cured - Corrosion inhibiting (39, 39a): Reduces wear and prevents galling when used on aluminum and aluminum alloys.


BRASS

Nickel Plated finishes - 9,9a: Nickel finish is hard, bright - has an attractive look - and is corrosive resistant, Copper plated - Copper - Copper alloys - Zinc, Zinc based alloys and brass parts. Steel parts.

Bright Dip - (21): Used to brighten brass material.

Tin Plate - (19,20,20a,38): Depending on the thickness/application specified by the customer. Tin plate can be utilized for articles to be soldered; to prevent galling; to prevent corrosion or to prevent formation of case during nutriding.

Clear Lacquer - (29): Provides protective tarnish and corrosion resistance, used mostly on brass.

Water Dip Lacquer - (30): Provides protective tarnish and corrosion resistance, used mostly on brass.

Zinc Plate (31,31a,31b,31d,31e): Electro deposited zinc coatings applied to brass articles provides protection from corrosion.

Black Zinc - (35): Provides corrosion resistance, decorative, used on brass.

Black Satin Finish - (37): Is a decorative finish, used on brass.


COPPER

Nickel Plated finishes - (9, 9a): Nickel finish is hard, bright, - has an attractive look - and is corrosive resistant. copper plated - Copper - Copper Alloys.

Silver Plate Finish - (10): Semi-bright in appearance. Good corrosion resistance depending on base metal. Will tarnish easily. Solderability is excellent but decreases with age. For articles such as terminals which are to be soldered. Also used on copper to enhance electrical Conductivity.

Lubricant- Solid Film - Heat Cured - Corrosion inhibiting (39, 39a): Reduces wear and prevents galling.


STAINLESS STEEL

Passivate - (12,12a): A process designed to remove foreign metals from the surface of stainless steel and corrosion resistant steels and to prevent natural tendency of surface to oxidize.

Zinc Plate - (31,31a,31b,31d,31e): Electro deposited zinc coatings applied to brass, steel and stainless steel articles provides protection from corrosion. Service lift of zinc coating is a function of its thickness and the type of environment to which it is exposed. Bright or dull finish acceptable.

Black Zinc - (35): Provides corrosion resistance, decorative, used on stainless steel.

Black Satin Finish - (37): Is a decorative finish, used on stainless steel.

Lubricant - Solid Film - Heat cured - Corrosion inhibiting (39, 39a): Reduces wear and prevents galling when used on stainless steel.

Black oxide - (11, 11a): For 300 series corrosion resistance - steel only.


STEEL

Cadmium - 6,6a,7,8: Bright silvery supplementary treatments for Type II can be golden, iridescent. Corrosion resistance is very good.

Black Oxide - (11,lla): Black oxide coatings; without supplementary preservative treatment are used when black surface is required. Limited corrosion protection under mildly corrosive conditions, For decorative purposes or decrease in light reflection.

Chromium Platings - (26): Provides a bright decorative finish; corrosion protection; wear resistance and pleasing appearance.


(27): Known as industrial or hard chromium; provides wear and abrasion resistance and incidental corrosion protection of parts as the specified thickness of the plating may afford.

Zinc Plate - (31,31a,31b,31d,31e): Electro deposited zinc coatings applied to iron, steel, stainless steel and brass articles provides protection from corrosion. Service life of zinc coating is a function of its thickness and the type of environment to which it is exposed. Bright or dull finish is acceptable.

Black Zinc - (35): Provides corrosion resistance, decorative, used on steel alloys.

Solder Plate - (32): Provides corrosion protection and solderability.

Black Phosphate - (34): Provides corrosion resistance; also acts as a lubricant. (28): Engineering chromium is usually applied directly to base metal and is finished by grinding to the specific dimensions.

Black Finish - (37): Is a decorative finish, used on steel alloys.

Lubricant - Solid Film - Heat Cured - Corrosion inhibiting (39, 39a): Reduces wear and prevents galling when used on steel alloys.


STEEL, ALLOY

Cadmium - 6,6a,7,8: Bright silvery supplementary treatments for type II can be golden, iridescent. Corrosion resistance is very good

Nickel Plate Finishes - 9,9a: Nickel Finish is hard, bright - has an attractive look - and is corrosive resistant. Copper plated - Copper - Copper alloys - Zinc, Zinc based alloys and brass parts. Steel parts.

Black Oxide - (11, I1a): Black oxide coatings; with or without supplementary preservative treatment are used when black surface is required, Limited corrosion protection under mildly corrosive conditions, for decorative purposes or decrease in light reflection.

Zinc Plate - (31,31a,31b,31d): Electro deposited zinc coatings applied to iron or stainless steel, and brass articles provides protection from corrosion. Service life of zinc coating is a function of its thickness and the type of environment to which it is exposed. Bright or dull finish is acceptable.

Black Phosphate - (34): Provides corrosion resistance; also acts as a lubricant. (28): Engineering chromium is usually applied directly to base metal and is finished by grinding to the specified dimensions.

Solder Plate - (32): Provides corrosion protection and solderability.

Black Chrome Satin - (33): Decorative.