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Attention to Detail for Accurate Custom Cuts


With the tightest custom cut tolerances of any small quantity US metal supplier, your materials get a 3-point inspection to ensure quality and accuracy before it ships.


Product Details, Specifications, and Technical Information

See Tool Steel Tolerances

Tool Steel Square Bar O1 offers excellent dimensional stability during heat treatment, and otherwise decent attributes. O1 is an oil-hardening, general purpose tool steel. While not as strong or wear resistant as A-2 or D-2, it experiences significantly less distortion during the heat treating process. It is typically used in rolls, punches, shear knives, food processing knives, and gauges.

shape Image
Dimension Name Specification
Height 0.3125
Max Length 36
Alloy O1
Production Method Ground
Shape Type Oversize
Eniteo Vendor ID 3145
MTR Availability Yes
Material Tool Steel
Shape Bar-Square
Custom Cut Warehouse 0
Material Specifications

This material meets the following specs: ASTM -A681, SAE -J-437

Weight/Lineal Foot
0.35 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  177 - 212
Rockwell Hardness B scale 88 - 95
Density g/cm^3 8
Elongation Typical % 20
Modulus of Elasticity KSI x 10^3 27
Melting Point °F 2580 - 2660
Specific Heat BTU/lb-°F (32-212F) 1
Ultimate Tensile Strength KSI 93
Thermal conductivity BTU-in/hr-ft^2-°F 300
Yield KSI 58
Shear Strength KSI 58
Chemistry Information: O1 Tool Steel
Element Percentage
C 0.94
Fe 96.56
Cr 0.5
Mn 1.2
Si 0.3
W 0.5
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