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O1 Flat Ground

O1 Flat Groundis an oil-hardening, non-deforming tool steel which can be hardened at relatively low temperatures. Tools and dies made from O1 Flat Ground will have good wearing and abrasive qualities since the tungsten and higher chromium content gives improved wear resistance. O1 Flat Ground is ground to a surface finish of up to 35Ra on six sides and is free from defects and decarburization. Sold in annealed state to be heat-treated.
  • Specifications: ASTM A681, QQ-T-570, AISI O1
  • AKA: O1 flat, O1 premachined
  • Applications: dies, knives, taps, punch plates, molds, etc.
  • Tolerances: Thickness = +/- .001", Width = +.005/-0
  • How is it Measured? Thickness (A)  X  Width (B)  X Length
  • Available Stock Sizes: 18 inch lengths

Rockwell Hardness*

62-64C

Corrosion Resistance

Low

Machinability

High

Depth of Hardening

Medium

Weldability

Medium

Grindability

High

Wear Resistance

Medium

Distortion in Heat Treating

Low

Overall Toughness

Medium

Decarburization Resistance

High

Strength

Medium

Resistance to Heat Softening

Low

* Can be hardened to Rockwell C64
Data provided for references only and is not warranted. 

O-1 Flat Ground
Stock
Number
Product Type Item Size & Description
A x B x C (Inches)
Weight
(lbs./pc.)
Click! Arrow to
Select Size
Qty Select / Price
809486 O-1 Flat Ground 1/16 x 1/2 x 18" 0.16
809497 O-1 Flat Ground 1/16 x 3/4 x 18" 0.24
809500 O-1 Flat Ground 1/16 x 1 x 18" 0.32
809522 O-1 Flat Ground 1/16 x 1-1/2 x 18" 0.48
809544 O-1 Flat Ground 1/16 x 2 x 18" 0.64
809555 O-1 Flat Ground 1/16 x 2-1/2 x 18" 0.80
809566 O-1 Flat Ground 1/16 x 3 x 18" 0.96
809588 O-1 Flat Ground 1/16 x 4 x 18" 1.28
810463 O-1 Flat Ground 1/8 x 1/2 x 18" 0.32
810485 O-1 Flat Ground 1/8 x 3/4 x 18" 0.48
810496 O-1 Flat Ground 1/8 x 1 x 18" 0.64
810521 O-1 Flat Ground 1/8 x 1-1/2 x 18" 1.00
810543 O-1 Flat Ground 1/8 x 2 x 18" 1.28
810554 O-1 Flat Ground 1/8 x 2-1/2 x 18" 1.60
810565 O-1 Flat Ground 1/8 x 3 x 18" 2.00
810587 O-1 Flat Ground 1/8 x 4 x 18" 2.52
811976 O-1 Flat Ground 1/4 x 1/4 x 18" 0.32
811987 O-1 Flat Ground 1/4 x 1/2 x 18" 0.65
811998 O-1 Flat Ground 1/4 x 3/4 x 18" 0.96
812006 O-1 Flat Ground 1/4 x 1 x 18" 1.30
812028 O-1 Flat Ground 1/4 X 1-1/2 x 18" 1.90
812050 O-1 Flat Ground 1/4 x 2 x 18" 2.60
812061 O-1 Flat Ground 1/4 x 2-1/2 x 18" 3.20
812072 O-1 Flat Ground 1/4 x 3 x 18" 3.90
812094 O-1 Flat Ground 1/4 x 4 x 18" 5.10
813009 O-1 Flat Ground 3/8 x 3/8 x 18" 0.75
813020 O-1 Flat Ground 3/8 x 1/2 x 18" 1.00
813031 O-1 Flat Ground 3/8 x 3/4 x 18" 1.50
813042 O-1 Flat Ground 3/8 x 1 x 18" 2.00
813064 O-1 Flat Ground 3/8 x 1-1/2 x 18" 2.90
813086 O-1 Flat Ground 3/8 x 2 x 18" 3.90
813097 O-1 Flat Ground 3/8 x 2-1/2 x 18" 4.80
813100 O-1 Flat Ground 3/8 x 3 x 18" 5.70
813111 O-1 Flat Ground 3/8 x 3-1/2 X 18" 6.80
813122 O-1 Flat Ground 3/8 x 4 x 18" 7.70
813687 O-1 Flat Ground 1/2 x 1/2 x 18" 1.30
813701 O-1 Flat Ground 1/2 x 3/4 x 18" 2.00
813712 O-1 Flat Ground 1/2 x 1 x 18" 2.60
813734 O-1 Flat Ground 1/2 x 1-1/2 x 18" 3.90
813745 O-1 Flat Ground 1/2 x 2 x 18" 5.10
813767 O-1 Flat Ground 1/2 x 3 x 18" 7.70
813789 O-1 Flat Ground 1/2 x 4 x 18" 10.20
814260 O-1 Flat Ground 5/8 x 5/8 x 18" 2.00
814271 O-1 Flat Ground 5/8 x 3/4 x 18" 2.40
814282 O-1 Flat Ground 5/8 x 1 x 18" 3.20
814307 O-1 Flat Ground 5/8 x 1-1/2 x 18" 4.80
814318 O-1 Flat Ground 5/8 x 2 x 18" 6.40
814340 O-1 Flat Ground 5/8 x 3 x 18" 9.60
814362 O-1 Flat Ground 5/8 x 4 x 18" 12.75
814599 O-1 Flat Ground 3/4 x 3/4 x 18" 2.85
814602 O-1 Flat Ground 3/4 x 1 x 18" 3.90
814624 O-1 Flat Ground 3/4 x 1-1/2 x 18" 5.70
814635 O-1 Flat Ground 3/4 x 2 x 18" 7.70
814657 O-1 Flat Ground 3/4 x 3 x 18" 11.50
814679 O-1 Flat Ground 3/4 x 4 x 18" 15.30
815106 O-1 Flat Ground 1 x 1 x 18" 6.00
815128 O-1 Flat Ground 1 x 1-1/2 x 18" 8.00
815139 O-1 Flat Ground 1 x 2 x 18" 11.00
815161 O-1 Flat Ground 1 x 3 x 18" 16.00
815183 O-1 Flat Ground 1 x 4 x 18" 21.00
Quantity Length in Feet, Inches and Fraction of Inch
PCS FT and IN  
Custom cut tolerances = plus / minus 1/16"
Call Us for Mitering and Large Quantities.
NOTICE: Custom Cut material is non-returnable and not cancelable once processing
begins. Custom cutting may require additional processing time.
Quantity Width in Inches Length in Inches
PCS and X and  
Custom cut tolerances = plus / minus 1/16"
Call Us for Mitering and Large Quantities.
NOTICE: Custom Cut material is non-returnable and not cancelable once processing
begins. Custom cutting may require additional processing time.