1144
Free Cutting Steel
Equivalent Grades: GB 4Cr5MoSiV1, JIS SKD61, ASTM H13, DIN X40CrMoV5-1. 1144 free cutting steels are utilized primarily to manufacture the parts which have the requirements of high precision in size, high finish in surface, but low mechanical property, such as gears, shafts, bolts, valves, bushings, pins, fittings, spring seat and machine screw, plastic mold, surgical and dental procedures utensils, certain automobile parts, instruments, etc.
Resulfurized carbon steel
Purpose
1144 is widely used in free cutting machining steel.
Product Features:
1. It is a high sulphur steel with good free cutting machining qualities and mechanical properties.
2. It provides better strength, hardness and wear resistance.
3. It can be hardened to further enhance surface properties and it is used as an economical replacement for high-end quenched and tempered alloy steel.
International Comparison of Materials
| EU EN | INTER ISO | USA AISI | JAPAN JIS | GERMANY DIN | CHINA GB | FRANCE AFNOR | ITALY UNI |
|---|---|---|---|---|---|---|---|
| -- | 44SMn28 | 1144 | SUM43 | 45S20 | -- | 45MF6.3 | -- |
| SPAIN UNE | Sweden SS | Finland SFS | Poland PN | Czechia CSN | Austria ONORM | Russia GOST | England BS |
|---|---|---|---|---|---|---|---|
| -- | -- | -- | -- | -- | -- | -- | 226M44 |
**This comparison table is for reference only. The standards and grades of various countries have slightly different chemical compositions. Please refer to the database for details.**
Chemical Composition(JIS G4051)
| C(%) | Si(%) | Mn(%) | P(%) | S(%) | Ni(%) | Cr(%) | Mo(%) | V(%) | Cu(%) |
|---|---|---|---|---|---|---|---|---|---|
| 0.40-0.48 | -- | 1.35-1.65 | 0≦0.04 | 0.24-0.33 | -- | -- | -- | -- | -- |
Mechanical properties
Tensile strength (kgf/mm²): 66.3~81.6
Yield strength (kgf/mm²): 25.7~56.1
Elongation (%): 8~25