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tigheknives.com inc. is now the Damasteel & RWL 34 Distributor in Canada
Call 905 892 2734 or email: tigheknives@xplornet.com to order
NEW! Pricing Catalogue
View Damasteel Canada Price List in PDF Format
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Composition of Damasteel Stainless Damascus
NOTE: Damasteel Stainless Damascus is made of (2)two Martensitic Stainless Steels, there is no "NonHardenable Austenitic" Stainless Steel used in this "Blade Making" grade of steel.
The 2 Stainless Steels used to make Damasteel
C (Carbon) Si (Silicon) Mn (Manganese) Cr (Chromium) Mo (Molybdenum) V (Vanadium) %
1) RWL34 (C)1.05 (Si).50 (Mn).50 (Cr)14 (Mo)4 (V).2 Bright Color
2) PMC27 (C).60 (Si).50 (Mn).50 (Cr)13.5 - - Dark Etching
Damasteel Stainless Damascus Bar Stock
Top-quality stainfree patterned bladesteel made in Sweden using powder metallurgy technology manufactured from RSP (Rapidly Solidified Powder) . The controlled swirls and whirls of Swedish-made stainless Damasteel barstock patterns are available in many different patterns and a range of dimensions. Stainless Damascus is available for stock-removal method knife makers, bladesmiths and jewellers.
Advantage of RSP vs. Conventional Steels,
The reason why the RSP steel give superior performance is found in the solidification structure. The coarse carbide structure of the conventional steels limits the fracture strength. The carbide clusters act like fracture initiation sites on a certain stress level. The substantially smaller carbides in the rapidly solidified material inhibit fracture initiation until the stress level is nearly doubled. The powder steels have around twice the fracture strength of conventional steels. The best combination of hardness and strength is found mostly in the rapidly solidified powder steels. Annealed for knifemaking. Manufactured in Sweden
View the Damasteel 93x .y Data Sheet in PDF Format
View the Damasteel 93x .y Hardening Instructions in PDF Format
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Heat Treatment
Hardening Temp. Tempering Temp. Time RWL34 PMC27
I) 1050 C (1920 F--220 C-(430 F)-2 hours--59-----53
2) 1050 C (1920 F--175 C-(345 F)-2 hours--62-----54
3) 1080 C (1980 F--220 C-(430 F)-2 hours--58-----56
4) 1080 C (1980 F--175 C-(345 F)-2 hours--63-----58
5) 1100 C (2010 F--175 C-(345 F)-2 hours--63.5 --60.5
* The treatment 4 and 5 include deep cooling -80 C (-140 F) after both hardening and tempering. Time 15 minutes. Low temperature tempering is recommended for best corrosion properties.
1) Heat to hardening temperature, hold for 10-15 minutes. You can use either an air or an oil quench, cooling to room temperature.
2) Temper 2 times for 2 hours each.
Etching
Etching Acid / Appr. time(minutes)/ Etching color RWL34 / Etching color PMC27.
I) H2SO4 30% (Sulphuric Acid) 5 Bright Gray Soap 0.1%
II) H2SO4 30% (Sulphuric Acid) 5 Bright Black HCL04 7 % (Perchloric Acid)
III) HCL 37% (Hydrochloric Acid) 5 Bright Black
Some makers are using muratic acid, but see directions below before proceeding
1) Finish the steel to at least 600 grit, 1200 is even better.
2) Light polish with a soft buff or hand polish.
3) Clean well with soap and warm water, or windex.
Alcohol and acetone are degreasers and do not work well as cleaning agents.
Some makers have tried ferric chloride (Radio Shack Etch.). This does not work well with Damasteel as both metals are hard and this gives less than satisfactory results.
4) Many makers are using warm Muratic Acid for the etch (as it comes from Home Hardware, do not dilute) on straight knives or folders, that do not need sections masked, and are getting great results.
5) For folders that need masking, use nail polish. Use a bright color, the bright colored nail polish serves two purposes, the first is to stop the etching where you don't want it, the second is to show where you have possibly blocked the etch you want.
On folders, sulphuric acid is recommended, because muratic acid tries to eat up under the nail polish.
6) Let the nail polish cure for several hours.
7) Use sulphuric acid, 30% with distilled water.
WHEN HANDLING ACIDS EXERCISE EXTREME CARE, WEAR APPROPRIATE PROTECTIVE CLOTHING. WHEN DILUTING, ALWAYS ADD THE ACID TO THE WATER, NEVER POUR WATER INTO THE ACID!
8) Etch 5 - 15 minutes depending on the effect you want.
9) Neutralize in baking soda and water, or ammonia.
10) Depending on the desired effect you can use the etch as is, buff lightly, or hand polish the top with 2000+ grit.
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Coloring Damasteel
The tempering color comes from interference in a thin transparent oxide layer, just like oil on water. When tempering Damasteel, the oxide growth rate is different on the two components. That results in different colors, and blue-red pattern can be developed on the metal surface. The martensitic stainless Damasteel can be heat treated and colored by tempering by the following procedure. This recipe is suitable for knife blades and gives around 59 HRC hardness. Observe that the high temperature tempering deteriorates the corrosion resistance. The oxide layer must therefore be lubricated from time to time.
1) Hardening. High hardening temperatures, 1080 C (1975 F). Time at temperature: 10 minutes.
2) Deep freezing to -60 C (-75 F). Some minutes until the piece is cooled through. Freezing in liquid carbon oxide or nitrogen is possible, but there is a risk of thermal cracks.
3) Tempering two times one hour in 510 C (950 F). Air cooling to room temperature between the temperings.
4) Deep-freezing according to point 2 (above).
5) The blade is fine ground and polished. Preferably wet grinding. Avoid overheated spots.
6) Etch according to instructions above.
7) Careful degreasing in acetone and then clean with soap and warm water. Avoid fingerprints on the surface.
8) Tempering two times at twenty minutes in 510 C (950 F). The time must be tested experimentally because the furnace type, air draft, etc. gives large differences.
Forging
1160 - 1050 Degrees C (2120 - 1920 Degrees F)
Melting starts at 1220 Degrees C (2230 Degrees F), which means that the material is sensitive to overheating. A good control of the heating temperature is needed. Electric or gas fired furnaces are recommended. Compared to normal low alloy carbon steels, the Martensitic stainless steels have higher, almost doubled deformation stresses. Hand forging must therefore be performed on relatively small dimensions. Long heating times lead to decarburization and scale formation.
Slow cooling after the hot working prevents crack formation at the Martensite formation temperature at 200 Degrees C (400 Degrees F). Cool under vermiculite or other heat insulating material.
Soft Annealing
Because of the cracking risk, no cutting or machining should be done after hot working until the material is annealed. The material should be annealed for 5 hours at 750 - 780 Degrees C (1380 - 1440 Degrees F). The bar material delivered from DAMASTEEL is annealed below 300 HV.
Pricing
View Damasteel Canada Price List in PDF Format
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