52100 Carbon Steel 6mm


52100 Carbon Steel is a very popular knife steel. It is a high carbon low alloy steel with good strength. When processed, high hardness between 62-66 HRC can be achieved after hardening, . It is hardened in oil. We recommend using the Premium Quench PQ11 – FAST, for this steel.

Available in size: 6mm x 50 x 1 meter

Out of stock



Chemical Composition

The following table shows the chemical composition of AISI 52100 alloy steel.

Element Content (%)
Iron, Fe 96.5 – 97.32
Chromium, Cr 1.30 – 1.60
Carbon, C 0.980 – 1.10
Manganese, Mn 0.250 – 0.450
Silicon, Si 0.150 – 0.300
Sulfur, S ≤ 0.0250
Phosphorous, P ≤ 0.0250


Mechanical properties

The mechanical properties of AISI 52100 alloy steel are outlined in the following table.

Properties Metric Imperial
Bulk modulus (typical for steel) 140 GPa 20300 ksi
Shear modulus (typical for steel) 80 GPa 11600 ksi
Elastic modulus 190-210 GPa 27557-30458 ksi
Poisson’s ratio 0.27-0.30 0.27-0.30
Hardness, Brinell
Hardness, Knoop (converted from Rockwell C hardness) 875 875
Hardness, Rockwell C (quenched in oil from 150°C tempered) 62 62
Hardness, Rockwell C (quenched in water from 150°C tempered) 64 64
Hardness, Rockwell C (quenched in oil) 64 64
Hardness, Rockwell C (quenched in water) 66 66
Hardness, Vickers (converted from Rockwell C hardness) 848 848
Machinability (spheroidized annealed and cold drawn. Based on 100 machinability for AISI 1212 steel) 40 40


Heat Treatment

AISI 52100 alloy steel can be machined using conventional techniques. The machinability of this steel can be improved by performing spherodizing annealing process at 649°C before machining.


AISI 52100 alloy steel can be formed using all conventional techniques such as cold forging or stamping and hot or cold upset forming techniques.

Heat Treatment

AISI 52100 alloy steel is heated at 816°C followed by quenching in oil. Before performing this process, it is subjected to normalizing heat treatment at 872°C  followed by slowly cooling in order to reduce the machining stress.


AISI 52100 alloy steel is forged at 927 to 1205°C.


AISI 52100 alloy steel is annealed at 872°C followed by slowly cooling to reduce cold working or machining stress.


AISI 52100 alloy steel is hardened by cold working, or heating and quenching. It can be carburized at 913°C followed by quenching. It is again heated at 788°C followed by quenching for the second time.

Additional information

Weight 2.5 kg
Dimensions 100 × 5 × 0.6 mm