Difference between revisions of "Materials Database"

Revision as of 07:41, 14 December 2022

Type	Carbon Steel
Modulus of Elasticity	30,000 ksi
Poisson's Ratio	0.29
Density	0.29 lb/in^3
Ultimate Tensile Strength	225 ksi
Tensile Yield Strength	200 ksi
Brinell Hardness	450 HB
Rockwell Hardness	C48
Elongation at Break	12%
Familiar Sellers	McMaster Carr, MakeItRingTargets, Alro Steel, SendCutSend

Material Description:

High strength, ultra wear resistant steel used in body armor and shooting targets
Hardened steel is difficult to machine, is typically only used for Waterjet parts
Typically used for weapons due to it's high strength, toughness, and relatively high hardness
Anecdotal experience from builders says that AR500 typically bends before it fractures
Will rust over time when wet or exposed to moist air

Type	Aluminum Alloy
Modulus of Elasticity	10,000 ksi
Shear Modulus	3800 ksi
Poisson's Ratio	0.33
Density	0.0984 lb/in^3
Ultimate Tensile Strength	45 ksi
Tensile Yield Strength	39 ksi
Fracture Toughness (T-L dir)	26.4 ksi-in½
Brinell Hardness	93 HB
Rockwell Hardness	B52
Elongation at Break	10%
Machinability (Vs. 1112 Steel)	270%
Familiar Sellers	McMaster Carr, Midwest Steel Supply, SendCutSend

Material Description:

Lightweight aluminum alloy that comes already pre-heat-treated T6 temper which gives it its strength
Beware of tempers T4 and O which are weaker than 6061-T6
Typically used for frame rails, plates, pulleys, and armor for some bots
Tends to fail in bending before fracturing
Tends to "ablate" and may take gashes when hit directly by weapons
Easy to machine and relatively cheap

Type	Aluminum Alloy
Modulus of Elasticity	10,000 ksi
Shear Modulus	3800 ksi
Poisson's Ratio	0.32
Density	0.102 lb/in^3
Ultimate Tensile Strength	81 ksi
Tensile Yield Strength	69 ksi
Fracture Toughness (T-L dir)	22.8 ksi-in½
Brinell Hardness	150 HB
Rockwell Hardness	B87
Elongation at Break	7.9%
Machinability (Vs. 1112 Steel)	170%
Familiar Sellers	McMaster Carr, Midwest Steel Supply, SendCutSend

Material Description:

Aerospace grade aluminum alloy which is much stronger and harder than 6061-T6
Pre-heat-treated to T6 temper
Past and anecdotal experience notes that it tends to fracture before it bends
Some builders recommend avoiding using it as armor or for parts that take direct hits due to fracture risk
Relatively easy to machine and is more expensive than 6061-T6

Type	Titanium Alloy
Modulus of Elasticity	16510 ksi
Shear Modulus	5800 ksi
Poisson's Ratio	0.32
Density	0.160 lb/in^3
Ultimate Tensile Strength	138-150 ksi
Tensile Yield Strength	128-140 ksi
Fracture Toughness (Annealed Plate)	67.9 ksi-in½
Brinell Hardness	310 HB
Rockwell Hardness	C34
Elongation at Break	6.7%
Machinability (Vs. 1112 Steel)	20%
Familiar Sellers	McMaster Carr, SendCutSend, TMS Titanium

Material Description:

Very high strength and high toughness metal alloy
Denser than aluminum but less dense than steel
Typically sold and used in its annealed state for high toughness
Typically used for armor, structural plates, sometimes weapons, it's pretty versatile material overall
Very expensive
Very difficult to machine due to work hardening properties
In some cases, outsourcing to SendCutSend might be preferable to buying Ti stock so discuss with your PM

@@ Line 208: / Line 208: @@
 *Very expensive
 *Very difficult to machine due to work hardening properties
+*In some cases, outsourcing to SendCutSend might be preferable to buying Ti stock so discuss with your PM
 == Data Sources ==