The free machining CHRONIFER® Labor M-13 steel has a high S content to enhance its machinability. However, it exhibits only a satisfactory corrosion resistance in water and water steam in the hardened, fine polished and passivized condition. In this condition its wear resistance is comparable to this of the CHRONIFER® M-13, 1.4034 grade.
This steel fulfills the basic elementary requirements for the production of medical, surgical and dental instruments as well as those for table cutlery.
Material Number 1.4035 (1.4034+S)
EN 10088-3 X46CrS13
DIN X46CrS13 (formerly X45CrS13)
AFNOR X45CrS13 (formerly Z44 CF14)
AISI/SAE/ASTM ≈ AISI 420 F
JIS SUS 420F
UNS ≈ S 42020
Chemical composition %
0.43 ~ 0.50
0.15 ~ 0.35
12.50 ~ 14.00
Soft anneal: 750 – 830°C, slow cooling 30°C/h down to 600°C, then air cooling Softening anneal: 650 – 760°C, air cooling Intermediary annealing during cold working: preferably 650 – 680°C, air cooling • Minimum reduction: ≥ 10 – 15%, to avoid an excessive grain growth.
Primary quench: 1000-1050°C / oil, or fast air, or gas cooling Optional: secondary quench by sub-zero cooling -20 down to -80°C/12 – 48h, preferably -80°C/12 – 24 Or cryo-treatment (deep cryo-cooling): -196°C/6 – 12h, progressive controlled cooling to avoid cracking. • To obtain the best efficiency, the secondary quench must be made without delay after the primary one.
Tempering according to needs, see Tempering diagram • Not recommended in the temperature range 400 – 580°C, (brittleness range) Not advisable because of the increased risk of intergranular corrosion.
We are specialised in stainless martensitic steels (knife steels), which are primarily used for the production of cutlery and
surgical instruments. products in forms of hot- and cold-rolled sheet, plate, strip, coil and bars.