SAE 1018 Round Bars, SAE 1018 Round bar manufacturer, SAE 1018 Rods Supplier, SAE 1018 StockiestSAE 1018 Dealers, SAE 1018 Distributors, SAE 1018 Whole sellers.
 
Grade Introduction:
There are many different categories of steel, and carbon steels are one such category that contains 0.12 to 2% carbon in them. The steel gains hardness and strength with heat treatment when the carbon percentage content increases; however its ductility is reduced.
SAE 1018 carbon steel is a free machining grade that is the most commonly available grade around the world. Although its mechanical properties are not very unique, it still can be easily formed, machined, welded and fabricated.
 
Grade Application:
SAE 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.
 
Equivalent grades:
National
Standard  
Grade   
C%
Si%
Mn%
Cr%
Mo%   
P%
S%
SAE
1018
0.15-0.2
≤0.1
0.6-0.9
≤0.04
≤0.04
GB
20
 0.117-0.24
 0.17-0.37
 0.35-0.65
 ≤0.25
 –
 ≤0.035
 ≤0.035
 
Addition to other grades:
MS, EN1a, EN3b, EN8, EN8d, EN9, EN19, EN24, EN31, EN32b, EN36c, EN41b, EN43b, EN47, EN353, IS2062, 42Crmo4, HCHCR, D2, D3, H-11, H-13, CW-1, OHNS, M2, M35, M42, 2714, SKD-11, P20, P20+s, P20+Ni, SCM 420, ASTM Sa-36, ASTM SA-105, SAE 1020, SAE 4140, SAE 8620, 16MNCR5, 20MNCR5, C20, C35, C40, C45, C50, C60, CK45, 20C8, 40C8, 45C8, 55C8, C55MN75, SAE52100, S40C, S355J2G3.
 
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Chemical composition:
The following table shows the chemical composition of SAE 1018 steel:
Element
Mn
C
S
P
Fe
Carbon(%)
0.60-0.90
0.15-0.20
0.05 Max
0.04 Max
Balance
 
Mechanical Properties:
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
 
Hardness:
 
Heat treatment:
SAE 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.
 
Hardening:
 
Tempering:
 
Physical Properties:
Properties
Metric
Imperial
Density
7.87 g/cm3
0.284 lb/in3
 
Thermal Properties:
Properties
Metric
Imperial
Thermal conductivity
51.9 W/mK
360 BTU in/hr.ft2.°F
 
Forging Properties:
Forging of SAE 1018 carbon steel can take place in the range of 996-1260°C (1825-2300°F).
 
Stress Reliving:
 
Normalizing:
 
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).
 
Density:
Density
7.87 g/cm3
0.284 lb/in3
 
Machine ability:
SAE 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.
 
Welding:
SAE 1018 carbon steel can be welded using most of the conventional methods such as gas, oxyacetylene, resistance, and submerged melt welding.
 
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