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Home → Blades and steel → Steel for knifemaking → RWL 34 → Steel RWL 34 - 3,5x38x500mm

Steel RWL 34 - 3,5x38x500mm

Steel RWL 34 - 3,5x38x500mm Click to view the picture detail.
Catalogue number:RWL35/38/500
Weight of an item:0.6 kg
Our price: 38,7 € (free of VAT), 46,4 € (inc. of VAT)
VAT:20%
:goods is in stock
piece

RWL 34 COMPOSITION


C Si Mn Cr Mo V %

1.05 .50 .50 14 4 .20
HOT WORKING
Forging - rolling temperature 1160 - 1050 C (2120 - 1920 F).
Melting occurs above 1220 C (2230 F). This means that the steel is relatively sensitive to
overheating.
”Burning” can occur at too high a heating temperature. Deformation heat must be considered.
Long heating times lead to material losses from scaling and decarburization.
Slow cooling or step annealing after hot working prevents cracking.

SOFT ANNEALING

After hot working, soft annealing is needed.
Alt.1 Ferritic annealing is performed at 770 C (1420 F). Annealing time 3 hours at temperature.
Hardness will be about 300 HV. Protective atmosphere or packing in cast iron mills can be
used to avoid decarburization.
Alt.2 Transformation annealing starts at 865 C (1410 F), and after that a slow cooling by
10 deg C/hour (20 deg F/hour) down to 700 C (1300 F). Hardness will be below 250 HV.
Protective atmosphere or packing to avoid decarburization.
HEAT TREATMENT - HARDENING
Hardening can be performed in a vacuum, salt or open-air furnace. In a muffle furnace surface oxidation
and decarburization occurs.
This can be minimized but not totally prevented by the use of foils or protective paints.
Time at temperature 10 - 15 minutes. Heavier dimensions need more time.
Quenching should be fast from hardening temperature down to less than 800 C (1500F)
The cooling from 300 C down to room temperature can be slower.
The martensite formation can cause distortion if there are temperature gradients in the piece.

HEAT TREATMENT RECOMMENDATIONS

Hardening - Tempering - Tempering Hardness Remarks
Temp. Temp. Time hours HRC
Deg. C/F Deg. C/F

I. 1050/1920 - 220/430 - 1 x 2 h 59 Low temperature

tempering for maximum corrosion resistance

II. 1050/1920 - 175/345 - 1 x 2 h 62 resistance


III. 1080/1980 - 175/345 - 1 x 2 h 63 ”

+deep cooling +deep cooling

VI. 1100/2010 - 175/345 - 1 x 2 h 63,5 ”

+deep cooling +deep cooling

V. 1050/1920 - 520/970 - 3 x 1 h 61 High temperature tempering

for maximum edge sharpness.

VI. 1100/2010 - 520/970 - 3 x 1 h 64 ”

+deep cooling +deep cooling

Deep cooling gives increased hardness, especially in combination with a high hardening

temperature.
Deep cooling is - 80 C minus ( - 144 F). Time, 10 minutes.
High temperature tempering reduces the corrosion resistance and should not be used for food
handling applications.

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