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Physical Properties | |
Density (lb / cu. in.) | 0.284 |
Specific Gravity | 7.86 |
Specific Heat (Btu/lb/Deg F - [32-212 Deg F]) | 0.107 |
Melting Point (Deg F) | 2770 |
Poissons Ratio | 0.3 |
Thermal Conductivity | 360 |
Mean Coeff Thermal Expansion | 6.7 |
Modulus of Elasticity Tension | 30 |
Modulus of Elasticity Torsion | 11 |
CARBON 1040 STEEL STRUCTURAL PLATE- Used when greater strength and
hardness is desired in the as rolled condition. Good for hammer
forge processes. Uses include gears, shafts, axles, bolts sand
studs. 1040 is a medium-carbon steel composed of 0.37 to 0.44
percent carbon, 0.6 to 0.9 percent manganese, a maximum of 0.04
percent phosphorus and a maximum of 0.05 sulphur. The remainder is
iron. 1040 steel sometimes contains 0.1 to 0.35 percent silicon,
according to Interlloy, an Australia-based alloy engineering steel,
tool steel and specialty steel producer.
CARBON 1040 STEEL STRUCTURAL PLATE equivalent to EN8/080M40. An
unalloyed medium carbon steel. AISI 1040 is a medium strength steel
with good tensile strength. Suitable for shafts, stressed pins,
studs, keys etc. 1040 must be pre-heated to 300 to 500 degrees F
before welding and reheated to between 1100 degrees F and 1200
degrees F after welding. Otherwise, the area near the weld may
develop cracks or become brittle and cause the part to fail during
use.
Tensile Strength
Ultimate tensile strength is the maximum load a material will
support before it breaks, explains Instron, a materials testing
laboratory. Ultimate tensile strength testing is a destruction
test. The purpose is to find the point at which a material will
fail when supporting a given load or sustaining a set force.
CARBON 1040 STEEL STRUCTURAL PLATE will support 90,000 pounds of
force per square inch before it fails, if it was hot-rolled. This
strength drops to 85,500 psi when the steel has been normalized, or
returned as closely as possible to the state it was in when it was
produced. Tensile strength drops even further, to 72,250, when it
has been annealed, or brought to its softest point while cold.
Normalizing and annealing are two examples of heat treatments. In
heat treatment the temperature of the steel is changed in order to
alter its molecular structure and change its reaction to various
forces during forging and fabrication, according to metallurgist
David Pye's heat treatment tutorial at Moldmaking Technology.