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AISI 1018 SAE UNS G10180
Carbon Steel Foundry
Steel foundry in China for producing
AISI 1018 SAE UNS G10180 Carbon Steel castings. The followings are
this material's chemical composition, physical and mechanical
properties and equivalent material grades.
The following
sections will discuss in detail about AISI 1018 carbon steel.
Chemical
Composition
The chemical
composition of AISI 1018 carbon steel is outlined in the following
table.
|
Element |
Content
(%) |
|
Manganese, Mn |
0.60-0.90 |
|
Carbon,
C |
0.15-0.20 |
|
Sulfur,
S |
0.05
(max) |
|
Phosphorous, P |
0.04
(max) |
|
Iron,
Fe |
Balance |
Physical Properties
The physical
properties of AISI 1018 carbon steel are tabulated below.
|
Properties |
Metric |
Imperial |
|
Density |
7.87
g/cm3 |
0.284
lb/in3 |
Mechanical Properties
The following
table shows mechanical properties of cold drawn AISI 1018 carbon
steel.
|
Properties |
Metric |
Imperial |
|
Tensile
strength |
440 MPa |
63800
psi |
|
Yield
strength |
370 MPa |
53700
psi |
|
Modulus
of elasticity |
205 GPa |
29700
ksi |
|
Shear
modulus (typical for steel) |
80 GPa |
11600
ksi |
|
Poisson’s ratio |
0.29 |
0.29 |
|
Elongation at break (in 50 mm) |
15% |
15% |
|
Hardness, Brinell |
126 |
126 |
|
Hardness, Knoop (converted from Brinell hardness) |
145 |
145 |
|
Hardness, Rockwell B (converted from Brinell hardness) |
71 |
71 |
|
Hardness, Vickers (converted from Brinell hardness) |
131 |
131 |
|
Machinability (based on AISI 1212 steel. as 100
machinability) |
70 |
70 |
Thermal Properties
The thermal
properties of AISI 1018 carbon steel are given in the following
table.
|
Properties |
Metric |
Imperial |
|
Thermal
conductivity |
51.9 W/mK |
360 BTU
in/hr.ft2.°F |
Other Designations
Other
designations that are equivalent to AISI 1018 carbon steel include
the following.
|
AMS
5069 |
ASTM
A29 |
ASTM
A512 |
ASTM
A611 (D-1) |
ASTM
A635 |
|
AMS
5069A |
ASTM
A510 |
ASTM
A794 |
ASTM
A519 |
ASTM
A544 |
|
ASTM
A108 |
ASTM
A513 |
ASTM
A830 |
ASTM
A545 |
ASTM
A548 |
|
ASTM
A549 |
ASTM
A659 |
SAE
J412 |
SAE
J1397 |
MIL
S-11310 (CS 1018) |
|
ASTM
A576 |
SAE
J403 |
SAE
J414 |
MIL
J-1397 |
MIL
J-403 |
Fabrication and Heat Treatment
Machinability
AISI 1018
carbon steel is rated at 62% of AISI 1112 carbon steel. Machining
provides this alloy with a fine finish, with continuous and hard
chips. It is possible to machine this alloy in all conditions.
Forming
It is easy to
form AISI 1018 carbon steel in the annealed condition.
Welding
AISI 1018
carbon steel can be welded using most of the conventional methods
such as gas, oxyacetylene, resistance, and submerged melt welding.
Heat Treatment
AISI 1018
carbon steel can be case hardened to Rc 42, but only in thin
sections. In case of thicker sections of over 4 in., Rc 28-30 can be
obtained.
Forging
Forging of AISI
1018 carbon steel can take place in the range of 996-1260°C
(1825-2300°F).
Hot Working
AISI 1018
carbon steel can be easily hot worked.
Cold Working
Cold working
AISI 1018 carbon steel will affect the hardness and mechanical
properties. Intermediate annealing has to be performed to overcome
the alloy’s tendency to work harden.
Annealing
Complete
annealing of this alloy can be achieved by soaking at 899°C (1650°F)
followed by furnace cooling. Process annealing can be done at 649°C
(1200°F).
Applications
AISI 1018
carbon steel is commonly used in high volume screw machine parts
applications. The other applications of this alloy are as follows:
Shafts
Spindles
Pins
Rods
Sprocket
assemblies.
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