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Prototype, Test, Teach


Experiment with new materials by ordering Protoboxes or Sample Packs


Product Details, Specifications, and Technical Information

See Cold Roll Steel Tolerances

It's a metal variety box filled with a mixture of different shapes, sizes, and weights in the metal of your choice. Designed with prototyping, testing, and tinkering in mind, most pieces in the Protobox are smaller than 12" x 6". Each Protobox is different, based on the materials available at the time your box is packed.

shape Image
Dimension Name Specification
Alloy 1018
Production Method 0
MTR Availability No
Material Carbon Steel
Shape Protobox
Custom Cut Warehouse 0
Ships In Limit Two Per Customer
Weight/Lineal Foot
20.0 pounds
Please note that this data is to be used ONLY FOR REFERENCE, NOT FOR DESIGN, and by using it,you agree that any decisions you make regarding materials for your project are at your own discretion.
Mechanical Properties
Property Value
Brinell Hardness 500 kg ball 126
Rockwell Hardness B scale 71
Elongation Typical % 15
Density g/cm^3 7
Melting Point °F 2590 - 2670
Modulus of Elasticity KSI x 10^3 29
Reduction of Area % 40
Specific Heat BTU/lb-°F (32-212F) 1
Thermal Conductivity BTU-in/hr-ft^2-°F 360
Tensile Strength KSI 70
Yield Strength KSI 58
Shear Strength KSI 43
Rockwell Hardness (for ball only) C Scale 60 min
Chemistry Information: 1018 Carbon Steel
Element Percentage
C 0.14 - 0.2
Fe 98.81 - 99.26
Mn 0.6 - 0.9
P 0.04 max
S 0.05 max
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