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OHNS Steel Supplier in India | Your Partner for Oil Hardening Tool Steel
Introduction to OHNS Steel
OHNS steel is a popular and versatile oil hardening, non-shrinking tool steel known for its excellent dimensional stability after heat treatment. This grade is a reliable choice for a wide variety of cold work tooling applications where intricate shapes and tight tolerances are critical. The presence of manganese, chromium, and tungsten provides a great balance of hardness, toughness, and wear resistance, making it an all-round performer. At Jupiter Steels, based in Delhi, we are a trusted stockist and supplier of OHNS steel, providing top-quality material to businesses throughout India, including industrial hubs in Manesar, Haryana, and beyond.
Chemical Composition of OHNS Steel
The reliable performance of OHNS steel is a direct result of its carefully controlled chemical composition. The key alloying elements and their typical weight percentages are:
- Carbon (C): 0.90 – 1.05%
- Chromium (Cr): 0.40 – 0.60%
- Manganese (Mn): 1.00 – 1.20%
- Tungsten (W): 0.40 – 0.60%
- Silicon (Si): 0.10 – 0.40%
Functioning and Reasoning of Chemical Elements
- Manganese (Mn): The high manganese content is the primary reason for this steel’s excellent hardenability and non-shrinking properties. It allows the steel to be hardened in oil, which is a slower, less severe quenching medium, thus minimizing the risk of distortion and cracking.
- Chromium (Cr) & Tungsten (W): Chromium and tungsten enhance the steel’s resistance to wear and abrasion and contribute to the formation of carbides, which increase the steel’s hardness and durability.
- High Carbon (C): The high carbon content is the primary reason for this steel’s ability to achieve high hardness and strength after heat treatment.
Hardness, Properties, and Applications of OHNS
Hardness
After heat treatment, OHNS steel can achieve a high working hardness, typically in the range of 58-62 HRC, providing a durable cutting edge and high resistance to wear.
Properties
- High Dimensional Stability: Its “non-shrinking” property means it undergoes minimal dimensional change during heat treatment, making it ideal for precision tooling.
- Good Wear Resistance: It offers good resistance to abrasive wear, which is essential for tooling that performs cutting and punching operations.
- Good Toughness: The balanced alloy content provides sufficient toughness to prevent chipping and fracturing under load.
- Excellent Machinability: In its annealed condition, it can be easily machined into complex shapes before the final heat treatment.
Applications
OHNS tool steel is extensively used in cold work tooling for cutting, blanking, stamping, and forming. Key applications include:
- Blanking and Piercing Dies
- Gauges and Templates
- Jigs and Fixtures
- Punches and Forming Tools
- Taps and Reamers
- Paper and Wood Cutting Knives
Why Choose Jupiter Steels for OHNS?
As a premier steel stockist in India, Jupiter Steels is your reliable partner. We are committed to providing you with top-notch materials and service.
- Certified Quality: We supply high-quality, genuine OHNS steel that meets international standards. Our reputation for excellence is a promise to our customers.
- Nationwide Supply Chain: While based in Delhi, our robust logistics network allows us to provide high-quality steel to customers across India, including Haryana, Manesar, Rajasthan, and other industrial areas.
- Expert Guidance: Our team has extensive knowledge of different steel grades. We don’t just sell steel; we provide expert advice to help you select the right material for your specific application.
OHNS Steel FAQ Section
Q1: What is OHNS steel used for?
A: OHNS steel is primarily used for cold work tooling that requires excellent dimensional stability and good wear resistance, such as precision dies, punches, and gauges.
Q2: Why is it called “non-shrinking”?
A: It is called “non-shrinking” because its composition allows it to be hardened with a relatively mild oil quench, which minimizes the internal stresses that cause distortion and dimensional change.
Q3: Can OHNS steel be used for high-temperature applications?
A: No, OHNS is a cold work tool steel and is not designed to retain hardness at elevated temperatures.
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