Typical applications
- Mechanical engineering applications
- Surgical instruments
Outokumpu Dura grades
Dura 4024
Martensitic grade with slightly increased hardenability (comp. 1.4006). Corrosion resistant in water and steam. For mechanical engineering applications and surgical instruments.
Product forms
Chemical composition
Dura 420/4021
Very popular martensitic grade. Corrosion resistant in water and steam. Low-medium hardness for applications such as cutting utensils, surgical instruments, press plates, brake discs and mechanical parts.
Typical applications
- Springs
- Cutting utensils and surgical instruments
- Press plates
- Brake discs
- Mechanical parts
- Wear resistant applications
Product forms
Chemical composition
Dura 420/4028
Medium-hardness martensitic grade. Corrosion resistant in water and steam. Applied for cutting utensils, surgical instruments, measuring tools, mechanical parts esp. subject to wear.
Typical applications
- Cutting utensils and surgical instruments
- Measuring tools
- Mechanical parts especially in wear resistant applications
- Springs
- Printing industry
Product forms
Chemical composition
Dura 420/4031
Martensitic grade with medium-high hardness . Corrosion resistant in water and steam. Applied for cutting utensils, surgical instruments, measuring tools, mechanical parts subject to wear.
Typical applications
- Cutting utensils
- Surgical instruments
- Measuring tools
- Mechanical parts subject to wear
Product forms
Chemical composition
Dura 420/4034
High-hardness martensitic grade. Corrosion resistant in water and steam. For e.g. professional kitchen knives, top-quality knives, surgical instruments, press plates, brake disks.
Typical applications
- Professional kitchen knives
- Top-quality knives
- Surgical instruments
- Press plates
- Brake disks
Product forms
Chemical composition
Dura 4110
High hardness martensitic grade (comp. 1.4034), but with improved corrosion and wear resistance. Applied for e.g. knife blades, scissors, surgical cutting tools, measuring tools, pump construction, valves.
Typical applications
- Knife blades
- Scissors
- Surgical cutting tools
- Measuring tools
- Pump construction
- Valves
Product forms
Chemical composition
Dura 4116
Similar to 1.4110, but with elevated wear resistance. Applied especially for cutting instruments which undergo partial hardening for excellent wear resistance of functional surfaces.
Typical applications
- Cutting instruments
Product forms
Chemical composition
Dura 4122
Outokumpu’s most corrosion resistant martensitic grade, good resistance in moderately corrosive, low chloride containing environments. Very good mechanical properties and wear resistance. Medium-high hardness. Applied for e.g. surgical instruments, food processing equipment, mechanical parts, machine and pump construction.
Typical applications
- Surgical instruments
- Food processing equipment
- Mechanical parts
- Machine and pump construction
Product forms
Chemical composition
Dura 17-7PH
Precipitation hardening grade with high strength and hardness, good corrosion resistance and satisfactory formability (depending on heat treatment/”Condition”). For e.g. retaining rings, springs, valves and gears, aircraft parts.
Typical applications
- Retaining rings
- Springs
- Valves and gears
- Aircraft parts
Product forms
Chemical composition
Circle Green Dura 420/4034
A high-hardness martensitic stainless steel that is corrosion resistant in water and steam.
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- EN: 1.4034
- ASTM type: 420
- ASTM UNS: S42000
- Microstructure: Martensitic
Typical applications
- Professional kitchen knives
- Surgical instruments
- Press plates
- Brake discs
Typical chemical composition, % by mass
- C: 0.45
- Cr: 13.7
- Ni: -
- Mo: -
- N: -
- Others: -
For Greater Hardness and Strength
Dura
The Dura range contains 14 martensitic and precipitation hardening stainless steel products designed for applications that demand a high level of surface hardness.
In addition to improved hardenability, these products are characterized by high strength and wear resistance attributes. For this reason, the main alternatives to the Dura range products are carbon steels rather than other ranges of stainless steel.
Dura range products are sold as solution annealed and then age hardened for use in applications that require hardness and a higher corrosion resistance than carbon steel can offer. These products are applicable to everything from high quality knives and scalpels all the way to aircraft landing gear. The precipitation hardening products are hardened by a special mechanism involving the formation of precipitates within the microstructure. Both martensitic and precipitation hardening stainless steels are magnetic.
Our Dura range is especially suitable for end products, which require heat treatment. In the case that you’re needs are geared towards high-strength stainless steels with no heat treatment requirements, our Forta range’s temper rolled products are suitable for those needs.
All Dura range products are readily available around the globe and are delivered from mills that are well known for their on-time delivery accuracy. You can depend on Outokumpu stainless steels to reliably and consistently meet the specifications that your application demands. Our experts can also create products that are custom-made to your precise specifications.
Standards and approvals
Dura range stainless steels meet the following standards:
| ASME SA240M Code Sect. II. Part A |
| ASTM A240/A240M |
| ASTM A240M |
| EN 10088-2 |
| EN 10088-3 |
| EN 10088-4 |
| EN 10088-5 |
Outokumpu meets the most common certifications and approvals, including:
- AD 2000 Merkblatt
- Approval of Material Manufacturers
- Factory Production Control Certificate
- ISO 9001
- ISO 14001
- ISO 50001
- ISO/TS 16949
- NORSOK
- OHSAS 18001
- Pressure Equipment Directive (PED)