O1 Tool Steel: Unrivaled Performance for Demanding Applications

The Ideal Choice for Precision Tooling, Dies, and Wear-Resistant Components

Maximize tool life, minimize downtime, and achieve superior results with our premium O1 tool steel

Looking for a reliable O1 tool steel supplier? Aobo Steel provides high-quality O1 tool steel with excellent wear resistance and machinability, ensuring top application performance.

What is O1 tool steel? O1 tool steel is a low-alloy cold work die steel. This steel has a certain degree of hardenability and wear resistance, with minimal quenching deformation. The carbide distribution is uniform, and the particles are fine. Manufacturers typically use O1 tool steel for manufacturing cold punching dies with small cross-sections, complex shapes, and various gauges and measuring tools.

O1 tool steel Applications

Ferramentas de corte
Toolmakers widely use O1 for cutting tools such as chisels, drills, and knife blades because it not only retains a sharp edge but also offers excellent wear resistance.
Punções e matrizes
O1’s toughness and wear resistance make it popular for punches and dies that endure repeated high-impact forces.
Facas e lâminas
O O1 é altamente considerado no setor de fabricação de facas por sua capacidade de manter uma borda afiada e, ao mesmo tempo, oferecer boa resistência. Isso o torna ideal para facas, machados e outras lâminas.
Lâminas de corte
Engineers often use O1 tool steel in shear blades since high hardness and edge retention are critical for effectively cutting through tough materials.

Alta resistência ao desgaste

O1 tool steel is made to withstand some pretty brutal conditions. Its endurance guarantees minimizing wear, even after long-term usage, extending the lifetime of tools and reducing maintenance costs.

Exceptional Toughness

Reliability is key. Under extreme pressure, O1 tool steel remains strong while other types develop cracks and fractures, making it suitable for high-stress applications.

Introduction to O1 tool steel

O1 steel has a relatively high manganese content, along with chromium and tungsten, which enhances its hardening ability, making intense water quenching unnecessary. Oil quenching can achieve a hardness of up to 62HRC. The steel also exhibits good machinability, wear resistance, stable heat treatment performance, and minimal dimensional deformation, but its toughness and corrosion resistance are relatively weak.

O1 steel composition

Elemento	Carbono (C)	Manganês (Mn)	Cromo (Cr)	Tungsten (W)	Vanádio (V)	Silício (Si)	Fósforo (P)	Enxofre (S)
Content (%)	0.85 – 1.00	1.00 – 1.40	0.40 – 0.60	0.40 – 0.60	0.30 max	0.10 – 0.40	0.030 max	0.030 max

O1 steel equivalent

Padrão	Grau equivalente
EUA (AISI)	O1
Germany (DIN, Werkstoff)	1.2510 (X153CrMoV12)
Japan (JIS)	SKS3
China (GB/T)	9CrWMn

O1 steel properties

Propriedade	Valor	Condição
Densidade	7.81 g/cm³	Hardened to 62 HRC
Electrical Conductivity	7.4% IACS	–
Yield Tensile Strength	58 ksi	Annealed
Shear Modulus	11,200 ksi	–
Shear Strength	58 ksi	Annealed
Fatigue Strength	40 ksi	Annealed
Elongation at Break	20%	Annealed
Machinability	85-95% of a 1% carbon steel	–

O1 steel heat treatment

Processo de recozimento isotérmico após o forjamento

Processo	Temperatura de aquecimento (°C)	Tempo de retenção (h)	Temperatura de revenimento (°C)	Tempo de têmpera (h)	Método de resfriamento	Dureza (HBW)
Processo de recozimento isotérmico após o forjamento	780 ~ 800	2 ~ 3	670 ~ 720	2 ~ 3	Resfriamento do forno a menos de 550°C e, em seguida, resfriamento a ar	197 ~ 241

Especificações de resfriamento

Temperatura de pré-aquecimento (°C)	Temperatura de aquecimento (°C)	Meio de resfriamento	Temperatura do meio de resfriamento (°C)	Método de resfriamento	Dureza (HRC)
650	820 ~ 840	Óleo	20 ~ 60	Resfriamento de óleo	64 ~ 66

Processo de resfriamento isotérmico

Temperatura de aquecimento (°C)	Temperatura de equalização (°C)	Tempo de equalização (h)	Estrutura de tratamento térmico
800 ~ 840	260 ~ 300	≤1	A estrutura básica é martensita + austenita retida + carboneto residual. Uma quantidade adequada de bainita é distribuída na base de martensita de alta resistência.

O1 steel hardness

The hardness of O1 tool steel depends on its heat treatment condition:

Condição	Dureza (HRC)
Annealed (Softened for machining)	20 – 22 HRC
After Hardening & Quenching	62 – 64 HRC
After Tempering (Typical range)	57 – 62 HRC

Especificações do processo de forjamento

Item	Temperatura de aquecimento/°C	Temperatura inicial de forjamento/°C	Temperatura final de forjamento/°C	Método de resfriamento
Lingote de aço	1150 ~ 1200	1100 ~ 1150	≥850	Resfriamento lento
Anel de aço	1100 ~ 1150	1050 ~ 1100	≥850	Resfriamento lento

O1 vs. O2 steel

O1 and O2 look like pretty much the same steel, and we’ve provided some data comparing them.

Propriedade	O1 Tool Steel	O2 Tool Steel
Carbon Content	0.90-1.00%	1.60%
Dureza (HRC)	57-62	62-66
Wear Resistance	Good (C, Cr, W)	Better (Higher C, V)
Toughness	High	Lower
Machinability	High	Lower
Corrosion Resistance	Poor, mild (0.5% Cr)	Poor (Minimal Cr)
Cost	Lower, widely available	Higher, less common
Uses	General tools, dies, punches	Cutting tools, precision dies

Try O1 Tool Steel and Feel the Difference!

Why settle for less when you can have something awesome for your manufacturing? Our O1 tool steel is tough, super easy to work with, and totally reliable—even for the hardest jobs. Check out how it can make your tools and operations better than ever!

O1 Steel Equivalents: DIN 1.2510 and JIS SKS3

O1 steel, equivalent to DIN 1.2510 in German and JIS SKS3 in Japanese. They are all low-alloy cold work tool steel and can be interchanged with these grades. They exhibit good plasticity, toughness, wear resistance, hardenability, and edge retention, with minor quenching distortion and a uniform, fine carbide distribution.

Introduction to DIN 1.2510 steel

1.2510 Chemical Composition

Carbono (C)	Cromo (Cr)	Molibdênio (Mo)	Vanádio (V)	Manganês (Mn)	Fósforo (P)	Enxofre (S)
1.40 – 1.60	4.00 – 5.00	1.00 – 2.00	0.50 – 1.00	0.20 – 0.60	≤ 0.030	≤ 0.030

1.2510 steel Heat treatment

Processo	Faixa de temperatura	Finalidade	Método de resfriamento
Recozimento	800°C - 850°C (1472°F - 1562°F)	Amolece o aço para melhorar a usinabilidade	Resfriamento lento no forno
Endurecimento	1000°C - 1100°C (1832°F - 2012°F)	Aumenta a dureza e a resistência ao desgaste	Têmpera a óleo ou a ar
Têmpera	500°C - 600°C (932°F - 1112°F)	Reduz a fragilidade e melhora a resistência	Resfriamento a ar

Introduction to JIS SKS3 steel

SKS3 Chemical Composition

Carbono (C)	Silício (Si)	Manganês (Mn)	Fósforo (P)	Enxofre (S)	Cromo (Cr)	Tungsten (W)
0.90–1.00	≤0.35	0.90–1.20	≤0.030	≤0.030	0.50–1.00	0.50–1.00

SKS3 steel Propertites

Propriedade	Valor
Densidade	7.85 g/cm³
Hardness (Annealed)	217 HB
Hardness (Quenched and Tempered)	55-64 HRC
Ultimate Tensile Strength	1690-2000 MPa
Yield Strength	1500-2200 MPa
Módulo elástico	172-193 GPa

Perguntas frequentes

1. What is O1 steel commonly used for?
Manufacturers use O1 steel to make knives and cutting tools because it holds a sharp edge well. They also use it for mechanical parts like punches and dies, where durability and precision are key.
2. Does O1 steel rust easily?
O1 steel rusts easily due to no chromium. Keep it dry and oiled to prevent rust.
3. Can I find O1 tool steel in bar form?
Yes. We supply O1 tool steel in various forms, including bar stock, to suit your project needs.
4. How do I purchase O1 steel?
Contact us today to request a quote. Our team will guide you through the process and ensure smooth delivery to your location.