HermanKnives
Banned
- Joined
- Aug 11, 1999
- Messages
- 734
anyone know the properties of this steel? any info wanted, thnx.
-
The BladeForums.com 2024 Traditional Knife is ready to order! See this thread for details: https://www.bladeforums.com/threads/bladeforums-2024-traditional-knife.2003187/
Price is$300$250 ea (shipped within CONUS). If you live outside the US, I will contact you after your order for extra shipping charges.
Order here: https://www.bladeforums.com/help/2024-traditional/ - Order as many as you like, we have plenty.
pmc27 in damasteel
- Thread starter HermanKnives
- Start date
From Damasteel..hope it helps
PMC27 Dark Etching
C .60% Si .50% Mn .50% Cr 3.5%
V -% -
FORGING
1160 - 1050 Deg C (2120 - 1920 Deg F)
Melting starts at 1220 Deg C (2230 DegF), which means that the material is
sensitive to overheating. A good control of the heating temperature is
needed. Electric or gas fired furnace is 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 leads to
decarburization and scale formation.
Slow cooling after the hot working prevents crack formation at the
martensite formation temperature at 200 Deg C (400 Deg 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 Deg C (1380 - 1440 Deg F). The bar material
delivered from DAMASTEEL is annealed below 300 HV.
AIR OR OIL QUENCH
HEAT TREATMENT
Temp Time RWL34 PMC27
I 1050 C (1920 F) 220 C (430 F) 1 x 2 h 59 53
II 1050 C (1920 F) 175 C (345 F) " 62 54
III 1080 C (1980 F) 220 C (430 F) " 58 56
IV* 1080 C (1980 F) 175 C (345 F) " 63 58
V* 1100 C (2010 F) 175 C (345 F) " 63.5 60.5
* The treatments IV and V include deep cooling -80 C ( -140 F) after both
hardening and tempering.Time 15 minutes. Low temperature tempering is
recommended for best corrosion properties.
ETCHING
Etching Acid Approx. time Etching colour
minutes RWL34 PMC27
I H2SO4 30 % 5 Bright Grey
Soap 0,1 %
II H2SO4 30 % 5 Bright Black
HClO4 7 %
III HCL 37 % 5 Bright Black
*many makers are using warm Muratic Acid with great results.
PMC27 Dark Etching
C .60% Si .50% Mn .50% Cr 3.5%
V -% -
FORGING
1160 - 1050 Deg C (2120 - 1920 Deg F)
Melting starts at 1220 Deg C (2230 DegF), which means that the material is
sensitive to overheating. A good control of the heating temperature is
needed. Electric or gas fired furnace is 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 leads to
decarburization and scale formation.
Slow cooling after the hot working prevents crack formation at the
martensite formation temperature at 200 Deg C (400 Deg 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 Deg C (1380 - 1440 Deg F). The bar material
delivered from DAMASTEEL is annealed below 300 HV.
AIR OR OIL QUENCH
HEAT TREATMENT
Temp Time RWL34 PMC27
I 1050 C (1920 F) 220 C (430 F) 1 x 2 h 59 53
II 1050 C (1920 F) 175 C (345 F) " 62 54
III 1080 C (1980 F) 220 C (430 F) " 58 56
IV* 1080 C (1980 F) 175 C (345 F) " 63 58
V* 1100 C (2010 F) 175 C (345 F) " 63.5 60.5
* The treatments IV and V include deep cooling -80 C ( -140 F) after both
hardening and tempering.Time 15 minutes. Low temperature tempering is
recommended for best corrosion properties.
ETCHING
Etching Acid Approx. time Etching colour
minutes RWL34 PMC27
I H2SO4 30 % 5 Bright Grey
Soap 0,1 %
II H2SO4 30 % 5 Bright Black
HClO4 7 %
III HCL 37 % 5 Bright Black
*many makers are using warm Muratic Acid with great results.