C10E, 1.1121, Ck10, C10 - carbon construction steel acc. to EN 10084.

Standards Steel Grade
Chemical Composition %
C: Si: Mn: P: S:
DIN/EN C10E - Ck10 - 1.1121
0,07-0,13 <0,4 0,3-0,6 <0,035 <0,035
EN C10 - 1.0301
0,07-0,13 <0,4 0,3-0,6 <0,045 <0,045
EN C10R - 1.1207
0,07-0,13 <0,4 0,3-0,6 <0,035 0,02-0,04
PN 10
0,07-0,14 0,15-0,40 0,35-0,65 <0,04 <0,04
ASTM SAE 1010 - UNS G10100
0,08-0,13 - 0,3-0,6 <0,04 <0,05
GOST ct10
0,07-0,14 0,17-0,37 0,35-0,55 <0,03 <0,035
NF XC10
0,07-0,13 <0,4 0,3-0,6 <0,035 <0,035
BS 045A10
0,07-0,13 <0,4 0,3-0,6 <0,025 0,015-0,040
BS 045M10
0,07-0,13 0,1-0,4 0,3-0,6 <0,05 <0,05

Description and characteristics

Common unalloyed steel for carburizing and hardening.

In carburized and quenched condition it is used for light-duty structural parts with soft core and hard case, for eample pins, shafts, axles, hubs.

In normalized condition it is used for washers, rods, screws, nuts and other fasteners. Pressable and machinable.

C10 has more sulphur and therefore is better machinable. C10D has less silicon.


Physical and mechanical properties

Steel 10 general mechanical properties in normalized condition (according to PN standards):

  • Tensile strength Rm: >490 MPa
  • Yield strength Re: >290 MPa
  • Elongation A: >14 %
  • Hardness: 85-140 HBW

Steel C10 general mechanical properties in toughened condition (according to PN standards):

  • Tensile strength Rm: >335 MPa
  • Yield strength Re: >205 MPa
  • Elongation A: >31 %

Heat treatment and working

Recommended working and heat treatment parameters for C10 alloy:

  • Carburizing: 880-980 °C
  • Case-hardening: 780-820 °C
  • Core-hardening: 880-920 °C
  • Stress relieving: 150-200 °C

Replacements, equivalents and other designations:

Talabot XC10, XC10, Almenit 1121, Bohler E900, C10E, Ck10k, Diro-Ck10, IS 1121, TS Ck10, DE 1121, EW Ck10, Klockner Ck10, A1510, C10E, 10, 12010, 2C10, C10, C10D, C10E, 045A10, 045M10, C10, S10C, 10C4, S10C, SM10C, OLC10, F-151, SAE 108, SAE 1010, C1120


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