Tool and Die Steel O1 Bars

When it comes to **Tool and Die Steel O1 Bars**, these materials are highly regarded for their impressive dimensional stability, hardness, and wear resistance, making them a go-to choice for precision tools and industrial components. O1 is an oil-hardening, cold-work tool steel that strikes a great balance between toughness and edge retention, ensuring it holds up well under repeated mechanical stress. These bars are not only easy to heat treat and machine, but they also maintain sharp cutting edges, making them reliable performers in tough environments. That’s why you’ll often find Tool and Die Steel O1 Bars in tooling, die-making, and high-accuracy engineering applications.

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O1 Tool Steel Round Bar

Die Steel O1 Rods

O1 Tool and Die Steel Bar

What is Tool and Die Steel O1 Bars?

The composition of Tool and Die Steel O1 Bars includes a high-carbon, high-chromium alloy, along with manganese, tungsten, and trace amounts of vanadium. This unique blend gives the steel its remarkable hardness, strong wear resistance, good toughness, and minimal distortion during heat treatment. O1 steel develops a fine, uniform grain structure that boosts its cutting ability and durability. Plus, it boasts stable mechanical properties, which means it can maintain its dimensional accuracy even after going through multiple heating and cooling cycles. These features make Tool and Die Steel O1 Bars perfect for applications that demand long-lasting performance and precise machining.

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Tool and Die Steel O1 Bars Specifications

Standard : ASTM A681, ASME SA681
Dimensions : EN, DIN, JIS, ASTM, BS, ASME, AISI
Form : Round
Diameter : 10 mm ~ 900 mm
Size : 0.08 mm to 25.00 mm
Diameter Range : 0.040 mm – 12 mm (0.0016” – 0.4724”)
Application : Lathe Tools, Milling Cutter, Cutter Blades, Boring Tools, Twist drills, Milling Knives, Reamers, Taps, Metalcutting saws, Screw Cutting Tools, File Cutter’s Chissels, Drills, Hobs, Drill Bits, Tread cutting tools etc

Chemical Compositions of Tool and Die Steel O1 Bars

CHEMICAL PROPERTIES	O1 STEEL (%)
Carbon	0.85-1.00
Manganese	1.00-1.40
Silicon	0.50
Chromium	0.40-0.60
Nickel	0.30
Tungsten	0.40-0.60
Vanadium	0.30
Copper	0.25
Phosphorus	0.03
Sulfur	0.03

Mechanical Properties of Tool and Die Steel O1 Bars

MECHANICAL PROPERTIES	O1 STEEL (Imperial)
Tensile Strength	245000 psi
Yield Strength	218000 psi
Elongation at Break	0.00%
Modulus of Elasticity	31000 ksi
Hardness (Rockwell)	50
Hardness (Vickers)	517
Hardness (Knoop)	513

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Equivalent Grades of Tool and Die Steel O1 Bars

Country	USA	German	Japan
Standard	ASTM A681	DIN EN ISO 4957	JIS G4404
Grades	O1	1.2510/100MnCrW4	SKS3

Thermal Properties of Tool and Die Steel O1 Bars

Properties		Conditions
Properties		T (°C)	Treatment
Thermal expansion	10.6 x 10^-6/ºC	20-260	–

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Tool and Die Steel O1 Bars Types

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Frequently Asked Questions (FAQ)

What Factors Should Be Considered When Choosing Tool and Die Steel O1 Bars?

When choosing O1 tool and die steel bars, consider factors like hardness, wear resistance, machinability, heat treatment requirements, intended application (e.g., cutting, stamping), and cost-effectiveness for long-term use.

How Do Tool and Die Steel O1 Bars Resist Corrosion?

O1 tool and die steel bars have moderate resistance to corrosion due to their carbon content and alloy composition. However, they are not stainless and can rust without proper maintenance, such as coating or regular oiling.

Can Tool And Die Steel O1 Bars Be Welded?

O1 tool and die steel can be welded, but it's crucial to preheat and control cooling rates to prevent cracking. Post-welding heat treatment is recommended to restore its hardness and properties.

Tool and Die Steel O1 Bars Uses

You’ll find Tool and Die Steel O1 Bars being utilized in various industries, including metalworking, automotive, woodworking, and precision manufacturing. Their outstanding edge retention and wear resistance make them ideal for crafting cutting tools, knives, punches, dies, gauges, and mold inserts. They also excel in forming tools, reamers, broaches, and other components that require sharpness and dimensional stability. O1 Bars are versatile enough for both manual and automated machining processes.

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