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AISI 1045 steel is characterized by good weldability, good machinability, and high strength and impact properties in either the normalized or hot-rolled condition.
AISI 1045 steel has a low through-hardening capability with only sections of around 60 mm in size being recommended as suitable for tempering and through-hardening. However, it can be efficiently flame- or induction-hardened in the normalized or hot rolled condition to obtain surface hardnesses in the range of Rc 54 – Rc 60 based on factors such as section size, type of set up, quenching medium used etc.
Chemical Composition
Element |
Content |
Carbon, C |
0.420 – 0.50 % |
Iron, Fe |
98.51 – 98.98 % |
Manganese, Mn |
0.60 – 0.90 % |
Phosphorous, P |
≤ 0.040 % |
Sulfur, S |
≤ 0.050 % |
Related Specifications |
|
Australia |
AS 1442 – 1992 1045 |
Germany |
W.Nr 1.0503 C45 |
Great Britain |
BS970 – Part 3 – 1991 080A47 |
Japan |
JIS G 4051 S45C |
USA |
AISI C1045 |
1045 steel equivalent as below:
ASTM A29/29M |
C |
Si |
Mn |
P |
S |
1045 |
0.43~0.50 |
/ |
0.60~0.90 |
≤0.040 |
≤0.050 |
DIN W-Nr |
C |
Si |
Mn |
P |
S |
1.1191/CK45 |
0.42~0.50 |
≤0.40 |
0.50~0.80 |
≤0.035 |
≤0.035 |
GB/T |
C |
Si |
Mn |
P |
S |
45 |
0.42~0.50 |
0.17~0.37 |
0.50~0.80 |
≤0.035 |
≤0.035 |
BS |
C |
Si |
Mn |
P |
S |
080M46 |
0.42~0.50 |
≤0.40 |
0.50~0.80 |
≤0.035 |
≤0.035 |
JIS |
C |
Si |
Mn |
P |
S |
S45C |
0.42~0.48 |
0.15~0.35 |
0.60~0.90 |
≤0.030 |
≤0.030 |
Mechanical Properties
Mechanical Properties |
Metric |
Imperial |
|
Hardness, Brinell |
163 |
163 |
|
Hardness, Knoop (Converted from Brinell hardness) |
184 |
184 |
|
Hardness, Rockwell B (Converted from Brinell hardness) |
84 |
84 |
|
Hardness, Vickers (Converted from Brinell hardness) |
170 |
170 |
|
Tensile Strength, Ultimate |
565 MPa |
81900 psi |
|
Tensile Strength, Yield |
310 MPa |
45000 psi |
|
Elongation at Break (in 50 mm) |
16.0 % |
16.0 % |
|
Reduction of Area |
40.0 % |
40.0 % |
|
Modulus of Elasticity (Typical for steel) |
200 GPa |
29000 ksi |
|
Bulk Modulus (Typical for steel) |
140 GPa |
20300 ksi |
|
Poissons Ratio (Typical For Steel) |
0.290 |
0.290 |
|
Shear Modulus (Typical for steel) |
80 GPa |
11600 ksi |
Typical Mechanical Properties – Hardened by Water Quench at 820 oC – 850 oC or oil quench at 830 oC – 860oC and Tempered Between 540 oC – 680 oC
Section Size mm |
up to 16mm |
17 – 40mm |
41 – 100mm |
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Tensile Strength Mpa |
Min |
700 |
650 |
630 |
||||
Max |
850 |
800 |
780 |
|||||
Yield Strength Mpa |
Min |
500 |
430 |
370 |
||||
Elongation in 50mm % |
Min |
14 |
16 |
17 |
||||
Impact Charpy J |
Average |
30 |
30 |
30 |
||||
Hardness HB |
Min |
210 |
195 |
185 |
||||
Max |
245 |
235 |
230 |
Suggested Pre-heat Temperature |
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Section |
25mm |
50mm |
75mm |
150mm + |
oC |
100 |
140 |
200 |
300 |