Cold Rolled Steels
C15E – 1.1141 / C15 / Ck15 / S15C / C18RR / XC12 / XC15 / RC15
C15E – 1.1141 steel grade is a material belonging to the group of low-carbon structural steels and is widely used in industrial applications. Although it is known under different standard designations in various countries, its fundamental characteristics remain largely the same. For instance, it is designated as C15E – 1.1141 in Germany, S15C in Japan, XC12 or XC15 in France, and C15 or Ck15 in some European standards. These alternative designations enable the steel to be widely recognized and utilized in international manufacturing and trade.
This steel typically contains approximately 0.15% carbon, which provides a ductile structure and excellent machinability. It performs reliably during machining and forming operations such as turning, drilling, milling, and shaping. In addition, its good weldability allows components to be joined safely and efficiently during manufacturing and assembly processes. These properties contribute to more efficient and cost-effective production operations.
One of the key advantages of C15E steel is its suitability for surface hardening treatments. When processes such as carburizing (case hardening) are applied, the outer surface becomes hardened while the core maintains its ductile properties. This characteristic provides a significant advantage for components that require both wear resistance and impact toughness. For this reason, C15E is commonly preferred in the production of various machine elements.
From a mechanical perspective, C15E steel is generally used in applications that require moderate strength and high machinability, rather than extremely high-strength heavy-duty components. This makes it a practical material choice for both mass production industries and general engineering applications.
Due to its cost-effectiveness, ease of processing, and wide range of applications, C15E – 1.1141 and equivalent steel grades have long been considered reliable engineering materials in industries such as automotive, machinery manufacturing, metal processing, and general industrial production.
Main Application Areas
- Production of shafts, pins, and small machine components
- Bolts, screws, and fastening elements
- Mechanical parts suitable for carburizing or case hardening
- Auxiliary mechanical components in the automotive industry
- Gear blanks and transmission elements
- Cold-formed metal components
- Welded steel structural parts
- Auxiliary components used in machine manufacturing
- Pipes, profiles, and various semi-finished metal products
Thanks to these properties, C15E – 1.1141 steel continues to be widely preferred as a reliable and economical material in modern industrial production.
General Identity
C15E – 1.1141
| Grade |
C15E |
| Number |
1,1141 |
| Classification |
Non alloy special steel |
Equivalent Grades
C15E – 1.1141
| USA |
1015 – 1016 |
| Germany, DIN |
C15 – Ck15 |
| France, AFNOR |
C18RR – XC12 – XC15 |
| England, BS |
040A15 080M15 CS17 |
| Italy, UNI |
C15 |
| Spain, UNE/td> |
C16k |
| Sweden, SS |
1370 |
| Czechia, CSN |
12020 – 12023 |
| Finland, SFS |
505 |
| Austria, ONORM |
RC15 |
Standards
C15E – 1.1141
| Standard 1 |
EN 10084: 2008 |
| Standard 2 |
EN 10132-2: 2000 |
| Standard 3 |
EN 10297-1: 2003 |
Chemical Composition
C15E – 1.1141
| C |
0.12 – 0.18 |
| Si |
max 0.40 |
| Mn |
0.30 – 0.60 |
| P |
max 0.035 |
| S |
max 0.035 |
Mechanical Properties
C15E – 1.1141
| Rm – Tensile strength (MPa) (+A) |
450 |
| Rm – Tensile strength (MPa) (+CR) |
870 |
| —– |
—– |
| Rp0.2 0.2% proof strength (MPa) (+A) |
360 |
| —– |
—– |
| A – Min. elongation Lo = 80 mm (%) (+A) |
25 |
| —– |
—– |
| Brinell hardness (HBW): (+A) |
143 |
| Brinell hardness (HBW): (+N) |
95 – 150 |
| Rockwell B hardness ( HRB or RB): (+A) |
76 |
| Vickers hardness ( HV): (+A) |
140 |
| Vickers hardness ( HV): (+CR) |
260 |
