Material Compatibility

Material & Coating Process Compatibility Guide
Material Description Designation Typical Use Typical Hardness "Coat-ability"
PVD CVD TD DCD
Air Hardened A6 Form Tools, Stamping 58 - 60 Rc
Air Hardened A2, A2S Form Tools, Stamping 58 - 60 Rc
Oil/Water Hardened O1, O6, W1 Draw & Press Tools 58 - 62 Rc
H-Series H13, H21, H26 Hot Work 52 - 58 Rc
M-Series M2, M4, M42 Cutting Tools 60 - 65 Rc
Specialty Steel CPM 3V, 9V, 10V Stamping & Forming 59 - 64 Rc
Specialty Steel Vanadis 4, 10 Stamping & Forming 59 - 64 Rc
Specialty Steel DC-53 Stamping & Forming 58 - 62 Rc
T-Series T1, T15 Cutting Tools 60 - 66 Rc
P-Series P20 Molds - General 25 - 30 Rc
S-Series S2, S5, S7 Heading Tools 56 - 58 Rc
D-Series D2, D3, D6 Press & Form Tools 58 - 62 Rc
Carbide Tungsten Carbide Inserts/Dies/Punches 72 - 82 Rc
400 Series SS 410, 416, 420, 440 Molds - General 40 - 60 Rc
300 Series SS 302, 303, 304, 316 Corrosion Protection Various
Carbon Steel 4140 Molds - General 35 - 45 Rc
Medium Carbon Steel NAK 55 Molds  35 - 40 Rc
Aluminum 6061 General Components Various Tempers
Beryllium Copper moldMAX Molds - General 35 - 45 Rc
Titanium Ti-6AL-4V Medical/General xxx
Brass * xxx Decorative xxx
Al/Zn/Mg Castings * xxx General Components xxx
ABS Plastic* xxx Decorative xxx
* - Can be coated only after parts have been chrome plated
  A very good material for the indicated coating process.   This material can be coated with the indicated process; however, possible material stability or composition issues may cause problems.
  A good material for the indicated coating process; however, there may be some minor process considerations.   This material is absolutely inappropriate for the indicated process:  do not attempt.

Please Note the Following:
  1. This is only a sample listing of materials and should not be considered definitive. Information has been generalized - please contact a Richter Precision Inc. representative regarding your specific application.
  2. All parts, regardless of coating process, should be sent to us already heat treated to your required hardness. In the case of the CVD and TD processes, parts will be annealed during coating and then re-heat treated afterward. However, being hardened prior to coating will reduce stresses and distortion during coating.
  3. When considering the PVD process, whenever appropriate for the material, we recommend that final draws be > 800° F: this will ensure that no annealing and/or distortion occur.

Comparison of Coating Process Characteristics
Process Characteristics PVD
Physical Vapor Deposition
CVD
Chemical Vapor Deposition
TR or TRD
Thermoreactive Diffusion
DCD
Dynamic Compound Deposition
Method Processed in a
vacuum chamber
(10-2 to 10-4 Torr)
Processed in
atmospheric or
vacuum reactor
Processed in an elemental salt bath Processed in a
proprietary vessel
Temperature Low process temperature
(320° to 800° F)
High standard
process temperature (1925°F)
High temperature process
(1650° to 1900°F)
Low temperature
process (100° F)
Deposition
Limitations
Line of sight
process
Coats wherever
gases contact
the tool surface
Coats wherever reactive bath contacts
the substrate
Coats wherever
coating media
contacts the surface
Bond Type Physical Chemical & metallurgical Diffusion Mechano-chemical
Average Thickness 1-5 µm, or
.00004-.0002"
4-12 µm, or
.00016-.00047"
4-12 µm, or
.00016-.00047"
0.5-2 μm, or
.00002"-.00008"
Material Limitations Suitable for a wide range of substrates More limited range of substrates than
for PVD
More limited range of
than for PVD :
  less than CVD
Suitable for a wide range of substrates
Tolerances Ideal for closely toleranced components
(+/-.0001)
Requires loose tolerances
(ex.: +/-.0005
per 1.0" dia.)
Similar to CVD -
some materials
more stable
Ideal for closely toleranced
components
(+/-.0001)
Post-Processing No heat-treating required after
coating
Heat-treating
required on
steel parts
HT required on HSS; tools steels need
to be tempered
No heat-treating required after coating
Edge Build-Up No excessive
coating build-up
Requires hone on edges due to thicker coating Requires hone on edges due to thicker coating No excessive coating build-up
Surface Finish Coating generally replicates existing surface finish Post-coating polish
can achieve
good finishes
Post-coating polish
can achieve
good finishes
Coating may have
slight matte effect
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