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AISI 1020 SAE UNS G10200
Carbon Steel Foundry
Steel foundry in China for producing
AISI 1020 SAE UNS G10200 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 1020 carbon steel.
Chemical
Composition
The chemical
composition of AISI 1020 carbon steel is outlined in the following
table.
|
Element |
Content
(%) |
|
Manganese, Mn |
0.30-0.60 |
|
Carbon,
C |
0.18-0.23 |
|
Sulfur,
S |
0.05
(max) |
|
Phosphorous, P |
0.04
(max) |
|
Iron,
Fe |
Balance |
Physical Properties
The physical
properties of AISI 1020 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 rolled AISI 1020 carbon
steel.
|
Properties |
Metric |
Imperial |
|
Tensile
strength |
420 MPa |
60900
psi |
|
Yield
strength |
350 MPa |
50800
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 |
121 |
121 |
|
Hardness, Knoop (converted from Brinell hardness) |
140 |
140 |
|
Hardness, Rockwell B (converted from Brinell hardness) |
68 |
68 |
|
Hardness, Vickers (converted from Brinell hardness) |
126 |
126 |
|
Machinability (based on AISI 1212 steel. as 100
machinability) |
65 |
65 |
Fabrication
and Heat Treatment
Machinability
Machinability
of AISI 1020 carbon steel is good at 65% compared to AISI 1112
carbon steel.
Forming
It is easy to
form AISI 1020 carbon steel using all the conventional methods as
this alloy is highly ductile.
Welding
AISI 1020
carbon steel can be welded easily using all of the traditional
methods.
Heat Treatment
AISI 1020
carbon steel can be hardened by heating between 815- 871°C (1500 -
1600°F), which should be followed by water quenching. Then it should
be tempered.
Forging
AISI 1020
carbon steel should be forged at 1260°C (2300°F) down to 982°C
(1800°F).
Hot Working
AISI 1020
carbon steel can be hot worked in the range of 482 to 649°C (900 to
1200°F).
Cold Working
Cold working
AISI 1020 carbon steel is possible using all the conventional
methods. In case of prolonged cold working, it is recommended that
stress relief annealing be carried out.
Annealing
Complete
annealing of this alloy can be achieved between 871-982°C (1600 to
1800°F) followed by slow furnace cooling. This will provide the
alloy with a tensile strength of about 65 ksi. A stress relief
annealing can be performed if required at 538°C (1000°F).
Tempering
Tempering
should be followed by heat treatment and quenching at 315 to 538°C
(600 to 1000°F) based on the strength level required. For example
538°C (1000°F) temper provides the alloy with a tensile strength of
90 ksi.
Hardening
AISI 1020
carbon steel can be hardened by cold working and by heat treatment,
quenching and tempering.
Applications
AISI 1020
carbon steel is used for simple structural applications such as cold
headed bolts. It is commonly used in the case hardened condition.
The other
applications of this alloy are as follows:
Pins
Shafts
Chains
Lightly
stressed gears
Hard wearing
surfaces
Case hardened
components where core strength is not essential.
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