OTAI SPECIAL STEEL is ASTM AISI 4145 Alloy structural steel stockholders and suppliers from china. we have more 16 years experience in 4145 steel supply.
4145 Steel is a high quality Quenched and Tempered Alloy Structural steel, It belong to the high quality medium carbon, Oil Quenched & Tempered Hardenss is 28-34 HRc.4145 Annealing delivery hardenss less than 250HB.
Related Specifications ASTM A29/A29M DIN EN 10083/3 JIS G4053 GB GB/T 3077
Chemical composition
| C(％) | 0.43～0.48 | Si(％) | 0.15～0.35 | Mn(％) | 0.75～1.00 | P(％) | ≤0.035 |
| S(％) | ≤0.040 | Cr(％) | 0.80～1.10 | Mo(％) | 0.15～0.25 |
Form of Supply
ASTM 4145 Alloy structural steel, we can supply the 4145 round bar, steel flat bar, plate, hexagonal steel bar and steel square block. 4145 steel Round bar can be sawn to your required lengths as one offs or multiple cut pieces. 4145 Rectangular pieces can be sawn from flat bar or plate to your specific sizes. Ground tool steel bar can be supplied, providing a quality precision finished bar to tight tolerances.
DIN 4145 Tool steel is a alloy structural steel, 4145 is used for engineering structural, like high tensile shafts, bolts and nuts, gears, pinions and spindles. Locomotive traction with the big gear, supercharger drive gear, pressure vessel, rear axle, gear load of connecting rod and a spring clip,4145 can also be used to under 2000 m deep well of oil drill pipe joint and the fishing tool, and can be used for bending machine mould, etcApplications
Regular size and Tolerance
| 1) Hot Rolled round bar | |||
| Diameter (mm) |
Diameter Tolerance (mm) |
Diameter (mm) |
Diameter Tolerance (mm) |
| ≤12.70 | -0.13 ～0.30 | >50.80～63.5 | -0.25～0.76 |
| 12.7～25.40 | -0.13～0.41 | >63.50～76.20 | -0.25～1.02 |
| >25.4～38.10 | -0.15～0.51 | >76.20～101.60 | -0.30～+1.27 |
| >38.1～50.80 | -0.20～0.64 | >101.60～203.20 | -0.38～3.81 |
| 2) Hot Rolled steel plate | |||
| Thickness (mm) |
Thickness Tolerance (mm) |
Thickness (mm) |
Thickness Tolerance (mm) |
| ≤25.4 | -0.41～0.79 | >127～152 | -1.60～2.39 |
| >25.4～76 | -0.79～1.19 | >178～254 | -1.98～3.18 |
| >76～127 | -1.19～1.60 | >254～305 | -2.39～3.96 |
Others 4145 have not specified size, pls contact our experienced sales team.
4145 tool steel round bar and flat sections can be cut to your required sizes. 4145 tool steel ground bar can also be supplied, providing a high quality tool steel precision ground tool steel bar to your required tolerances. 4145 steel is also available as Ground Flat Stock / Gauge Plate, in standard and nonstandard sizes.
Contact our experienced sales team to help you with your4145 Tool steel questionsadn enquiry by Email or Telphone. The questions will be reply in 24 hours.
OTAI SPECIAL STEEL CO., LTD
Email: Jack@otaisteel.com
Tel: +86-769- 23190193
Fax: +86-769-88705839
