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Introduction
ASTM A108
covers cold-finished carbon steel bars produced to closer tolerances, improved
surface finish, and enhanced mechanical properties compared to hot-rolled bars.
These bars are manufactured through cold drawing, turning, grinding, or
polishing processes, resulting in superior dimensional accuracy and
machinability.
ASTM A108
carbon steel bars are widely used in precision engineering, automotive,
machinery, and general manufacturing industries where tight tolerances, smooth
surface finish, and consistent mechanical properties are required.
Ladhani
Metal Corporation is a manufacturer, supplier, and stockist of ASTM A108 carbon
steel bars, offering a wide range of grades, sizes, and finishes for industrial
and engineering applications.
Applicable Standard
Standard
Specification: ASTM A108
Issuing Organization: ASTM International
Title: Standard Specification for Steel Bars, Carbon, Cold-Finished, Standard
Quality
This
specification covers cold-finished carbon steel bars produced from hot-wrought
bars by cold working processes to improve dimensional accuracy and surface
quality.
Forms of Supply
ASTM A108
carbon steel bars are supplied in various forms depending on application and
machining requirements.
Round bars
Square bars
Flat bars
Hexagonal bars
Other forms available:
Cold drawn
bars
Turned bars
Polished bars
Ground bars
Typical supply condition:
Cold drawn
condition
Turned and polished condition
Ground condition
Standard sizes:
Diameter: 5
mm to 150 mm
Length: 3 m to 6 m or cut-to-length
Surface finishes:
Bright
finish
Smooth machined finish
Centerless ground finish
Grades Covered Under ASTM A108
ASTM A108
includes a wide range of low and medium carbon steel grades, typically aligned
with AISI designations.
Common
grades include:
1008, 1010,
1015, 1016, 1018, 1020, 1022, 1025, 1030, 1035, 1040, 1045, 1050, 1095
These grades
vary in carbon content and machinability characteristics.
ASTM A108 – Chemical
Composition of Cold-Finished Carbon Steel Bars
|
Grade Designation |
Carbon (%) |
Manganese
(%) |
Phosphorus
(%) |
Sulfur (%) |
|
|
1008 |
0.10 max |
0.30–0.50 |
0.040 max |
0.050 max |
|
|
1010 |
0.08–0.13 |
0.30–0.60 |
0.040 max |
0.050 max |
|
|
1015 |
0.13–0.18 |
0.30–0.60 |
0.040 max |
0.050 max |
|
|
1016 |
0.13–0.18 |
0.60–0.90 |
0.040 max |
0.050 max |
|
|
1018 |
0.15–0.20 |
0.60–0.90 |
0.040 max |
0.050 max |
|
|
1020 |
0.18–0.23 |
0.30–0.60 |
0.040 max |
0.050 max |
|
|
1022 |
0.18–0.23 |
0.70–1.00 |
0.040 max |
0.050 max |
|
|
1025 |
0.22–0.28 |
0.30–0.60 |
0.040 max |
0.050 max |
|
|
1030 |
0.28–0.34 |
0.60–0.90 |
0.040 max |
0.050 max |
|
|
1035 |
0.32–0.38 |
0.60–0.90 |
0.040 max |
0.050 max |
|
|
1040 |
0.37–0.44 |
0.60–0.90 |
0.040 max |
0.050 max |
|
|
1045 |
0.43–0.50 |
0.60–0.90 |
0.040 max |
0.050 max |
|
|
1050 |
0.48–0.55 |
0.60–0.90 |
0.040 max |
0.050 max |
Free-cutting
grades contain higher sulfur and phosphorus for improved machinability.
Mechanical Properties of ASTM A108 Carbon Steel Bars
Mechanical
properties depend on grade and processing condition.
|
Grade |
Tensile Strength (MPa) |
Yield Strength (MPa) |
Elongation (%) |
|
1018 |
440 – 590 |
370 |
15 – 25 |
|
1020 |
410 – 550 |
250 |
20 – 30 |
|
1045 |
570 – 700 |
310 |
16 – 22 |
Key Features of ASTM A108 Carbon Steel Bars
• Superior
dimensional accuracy due to cold finishing
• Excellent surface finish (bright bars)
• Improved machinability
• Good strength and uniform mechanical properties
• Suitable for precision engineering applications
• Availability in a wide range of grades
• Ideal for CNC machining and automated production
Machinability
ASTM A108
steels, especially free-cutting grades, offer excellent machinability.
Higher
sulfur improves chip breaking
Lead (in 12L14) enhances cutting performance
Reduced tool wear and improved surface finish
These
properties make them ideal for high-speed machining operations.
Applications of ASTM A108 Carbon Steel Bars
ASTM A108
carbon steel bars are widely used in various industries.
Automotive Industry
Shafts
Pins
Axles
Fasteners
Machining Industry
Precision
turned components
CNC machined parts
Automatic lathe components
Construction and Engineering
Structural
fittings
Machine parts
General fabrication
Fastener Industry
Bolts
Nuts
Studs
Threaded components
General Engineering
Bushings
Couplings
Spacers
Mechanical fittings
Conclusion
ASTM A108
carbon steel bars are high-quality cold-finished steels offering excellent
surface finish, tight tolerances, and superior machinability. These bars are
ideal for precision components and high-volume machining applications.
Ladhani
Metal Corporation supplies ASTM A108 carbon steel bars in a wide range of
grades and sizes, ensuring consistent quality and reliable performance for
automotive, machining, and industrial applications.
FOR REQUIREMENT OF THIS GRADE
OR FOR DETAIL CONTACT US AT :-
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