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Carbon Steels 1018

Related Metals: StarDOM 1018(tm)
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Specifications: AMS 5069
ASTM A108
ASTM A29 (1018)
ASTM A510 (1018)
ASTM A512 (1018)
ASTM A513
ASTM A519 (1018)
ASTM A544 (1018)
ASTM A545 (1018)
ASTM A548 (1018)
ASTM A549 (1018)
ASTM A576 (1018)
ASTM A611 (D-1)
ASTM A635 (1018)
ASTM A659 (1018)
ASTM A794 (1018)
ASTM A830
MIL J-1397 (1018)
MIL J-403 (1018)
MIL J-412 (1018)
MIL S-11310 (CS 1018)
SAE J1397
SAE J403
SAE J412
UNS G10180

Chemistry Data

Carbon

0.14 - 0.2

Iron

Balance

Manganese

0.6 - 0.9

Phosphorus

0.04 max

Sulphur

0.05 max

General Information

Principal Design Features

1018 is among the most commonly available grades available in the world. It is widely available in cold finished rounds, squares, flat bar and hexagons. Despite its unimpressive mechanical properties, the alloy is easily formed, machined, welded and fabricated. Due to its higher Mn content, it can, in thin sections, be hardened to Rc 42.


Applications

The alloy is a free machining grade that is often employed in high volume screw machine parts applications. It is commonly employed in shafts, spindles, pins, rods, sprocket assemblies and an incredibly wide variety of component parts.


Machinability

1018 is rated at 62% of 1112 carbon steel. The alloy can be easily brought to a fine finish, its chips are continuous and hard and it can be machined in all conditions.


Forming

1018 can be easily formed in the annealed condition.


Welding

1018 has been successfully welded using most all the common practices including gas, resistance, oxyacetylene, and submerged melt welding.


Heat Treatment

1018 can, in thin sections be case hardened to Rc 42. In thicker sections, over 4", Rc 28-30 can be obtained.


Forging

Forge this alloy in the range of 1825-2300 F.


Hot Working

1018 can easily be hot worked.


Cold Working

Cold working 1018 will have a significant affect on hardness and mechanical properties. Intermediate annealing is required to overcome its tendency to work harden.


Annealing

A full anneal can be achieved by soaking at 1650 F followed by furnace cooling. Process annealing can be done at 1200 F.


Hardening

See heat treatment and cold working notes.


Physical Data

Density (lb / cu. in.)

0.283

Specific Gravity

7.82

Specific Heat (Btu/lb/Deg F - [32-212 Deg F])

0.116

Mean Coeff Thermal Expansion

6.7

Mechanical Data

Form

Round Bar

Condition

Annealed

Temper

68

Tensile Strength

60

Yield Strength

44

Elongation

35

Reduction of Area

67

Brinnell

127


Form

Round Bar

Condition

Hot Rolled

Temper

68

Tensile Strength

68

Yield Strength

50

Elongation

36

Reduction of Area

65

Brinnell

143


Form

Round Bar

Condition

Normalized

Temper

68

Tensile Strength

66

Yield Strength

50

Elongation

36

Reduction of Area

68

Brinnell

135


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