General Information for Steel 1045
Material Group |
P - Steel |
Sub-Grou |
Carbon Steel |
Tensile Strengt |
630-800 [N/mm^2] |
Machinability |
65% |
MACHINABILITY OF 1045 STEEL
SAE 1045 is a carbon steel produced to a range of 0.43–0.50% carbon and 0.60–0.90% manganese it is primarily used in gears, shafts, axles, studs, and other machine parts. It is a popular alloy because of the good balance between machinability and mechanical properties.
Hardness levels of 1045 steel:
160 HB - Hot Rolled
165 – 200 HB - Cold Drawn.
The average machinability rating of SAE 1045 is around 65% (Annealed condition).
SUMMARY:
For turning operations on 1045, it is best to use inserts with thick CVD coating over a medium-hard substrate. For milling, any all-around carbide grade is suitable.
For detailed carbide grades recommendations, check the table below.
Recommended Cutting speed range for turning at stable conditions is 790 - 1080 [SFM] / 240 - 330 [m/min].
Recommended Cutting speed range for milling with stable clamping and short overhang is 490 - 670 [SFM] / 150 - 205 [m/min]
For detailed cutting speed recommendations, check the table below.
Equivalent International Designations for Steel 1045
Standard |
Name |
SAE |
1045 |
WNR |
1.0503 |
DIN |
C45 |
BS |
080M46 |
SS |
1650 |
ANFOR |
CC45 |
UNI |
C45 |
UNF |
F.114 |
JS1 |
S45C |
Chemical Composition for Steel 1045
Element |
Amount |
Manganese (Mn) |
.60-.90% |
Carbon (C) |
.43-.50% |
Sulfur (S) |
0.05% |
Phosphorus (P) |
0.04% |
Cutting Speeds Recomendations for Steel 1045
Application |
Vc (m/min) |
Vc (SFM) |
Turning |
240-330 |
790-1080 |
Milling |
150-205 |
490-670 |
Parting |
115-155 |
380-510 |
Grooving |
135-185 |
440-610 |
Drilling |
95-130 |
310-430 |
Important! The speed estimation is given for an ideal situation:
- Most suitable carbide grade
- Stable tool clamping
- Stable workpiece clamping
- Good quality raw material
- Ashort overhang of the cutting tool.
- Nominal hardness of the material.
- etc.
Recommended Carbide Grades for Steel 1045
Grade for Milling (Indexable)
Recommended Insert Cutting Edge Geometry for Steel 1045
Honing Siz |
0.05-0.08 mm / 0.002-0.003" |
Rake Angl |
11° -13° |
Land Angl |
Positive |
Land Widt |
0.20-0.30 mm / 0.008-0.012" |