Alloy Steel Bars

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AISI 4340 steel is a low alloy steel which contains at least 0.7 Cr%, 1.65 Ni%, and 0.2% Mo as strengthening alloy elements as per ASTM A29.As a heat treatable steel,AISI 4340 has a very good balance of strength, toughness and wear-resistance,and can attain high strength while retaining good fatigue strength which makes it ideal for all highly stressed parts in the most severe conditions.

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16mncr5 Alloy Steel Round Bar are alloyed case hardening engineering steels for parts which require core tensile strength of 800 – 1100 N/mm² and good wearing resistance. It is an engineering material typically used to manufacture piston bolts, camshafts, levers and other vehicle and mechanical engineering components.

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20 Mncr5 Alloy Steel Round Barsare low alloyed engineering case hardening steel for parts which require core tensile strength of 1000 – 1300 N/mm² and good wearing resistance. It is used in boxes, piston bolts, spindles, camshafts, gears, shafts and other mechanical controlling parts.

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EN19 is a high quality alloy steel with tensile strength. With a combination of good ductility and shock resistance, EN19 is suitable for applications with very high loading such as engine gear boxes.

We are stockist and supplier of EN19 round bars, EN19 alloy steel. 

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SAE 8620 steel is a common low nickel-chromium-molybdenum steel. It is a case hardening carburizing alloy steel. This alloy steel is flexible during hardening treatments, thus enabling improvement of case/core properties. It is usually supplied in as-rolled condition but can also be supplied in bright bar form.

 

SAE 8620 steel can be used for a number of medium-strength applications such as camshafts, fasteners, gears, and chains/chain pins.

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41Cr4 Alloy Steel Round Bars (EN18 / DIN 1.7035 / AISI 5140)

KR Steel Udyog is a trusted dealer and stockist of 41Cr4 round bars in India, offering a wide size range from 20 mm Dia to 90 mm Dia, sourced from leading steelmakers RINL, Bhushan, and JSW. With a strong focus on quality and service, we supply EN18 alloy steel bars that meet diverse industrial and automotive engineering requirements.

Material Overview

41Cr4, also known as EN18 / DIN 1.7035 / AISI 5140 / BS 530M40, is a chromium-manganese medium carbon alloy steel. It offers a superior balance of strength, toughness, and wear resistance compared to plain carbon steels, making it a preferred choice for components subject to high mechanical stress. The grade is highly suitable for quenching and tempering, induction hardening, and other surface hardening processes, which enhance its fatigue resistance and service life.

Chemical Composition (Typical %)

• Carbon (C): 0.38 – 0.45

• Manganese (Mn): 0.60 – 0.90

• Silicon (Si): ≤ 0.40

• Chromium (Cr): 0.90 – 1.20

• Phosphorus (P): ≤ 0.035

• Sulphur (S): ≤ 0.035

This balanced composition gives 41Cr4 its characteristic strength, hardenability, and wear resistance, while maintaining good machinability in normalized or annealed condition.

Mechanical Properties (after Q&T treatment)

• Tensile Strength: 700 – 1100 MPa (depending on tempering condition)

• Yield Strength: ≥ 600 MPa

• Elongation: 12 – 16 %

• Impact Toughness: Good, even at lower temperatures

• Hardness (Q&T): 200 – 280 HB

• Surface Hardness (after induction/flame hardening): up to 55 HRC

These properties make it well-suited for critical engineering parts requiring a tough core and a hard, wear-resistant surface.

Sizes & Supply Range

• Diameter: 20 mm to 90 mm

• Form: Hot Rolled, Forged, Peeled / Turned Round Bars

• Condition: Annealed, Normalized, Quenched & Tempered

• Certification: Mill Test Certificates (MTC) from RINL, Bhushan, JSW

• Tolerance & Finish: As per customer requirements for B2B supplies

Applications of 41Cr4 / EN18 Round Bars

41Cr4 alloy steel is widely used in automotive, machinery, power transmission, and industrial equipment manufacturing. Typical applications include:

• Automotive Components: gear shafts, rear axle shafts, crankshafts, steering knuckles, half shafts.

• Power Transmission: gears, pinions, sprockets, worm gears, spline shafts, couplings.

• Industrial Machinery: spindles, tool holders, mandrels, bushes, machine tool parts under medium loads.

• Surface Hardened Parts: rollers, cams, sleeves, and components needing wear resistance with a tough inner core.

 

Advantages of 41Cr4 Alloy Steel

• High strength & wear resistance compared to carbon steels.

• Excellent hardenability, suitable for oil quenching and larger section sizes.

• Good fatigue resistance for rotating parts under cyclic loading.

• Versatility in heat treatment to achieve desired strength and hardness.Why Choose KR Steel Udyog

• Trusted Stockist of 41Cr4 / EN18 round bars in India.

• Ready inventory in sizes 20–90 mm Dia for prompt dispatch.

• Material sourced from reputed mills (RINL, Bhushan, JSW) with full traceability.

Product Details:

EN36 case hardening steel is a type of alloy steel that is known for its excellent wear resistance, toughness, and hardenability. This steel is commonly used for case hardening, a heat treatment process that involves introducing a hard, wear-resistant surface layer on a low-carbon steel substrate.

EN36 case hardening steel is a high-carbon, low-alloy steel that contains a high percentage of chromium, nickel, and molybdenum. This combination of elements gives the steel excellent wear resistance, toughness, and hardenability. It is known to have a high core strength and a hard surface which makes it suitable for gears, shafts, and other mechanical components that are subjected to high stress and wear.

The case hardening process involves heating the steel to a high temperature and then rapidly cooling it, which causes the surface of the steel to harden while the core remains relatively soft. This creates a hard, wear-resistant surface layer that is able to withstand high stress and wear while the core remains ductile and able to absorb impacts.

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Experience the strength and resilience of EN24 Alloy Steel round bars, the pinnacle of engineering materials. EN24 steel is renowned for its exceptional combination of strength, toughness, and wear resistance, making it a standout choice for highly stressed components in various industries. From automotive to aerospace and tooling, EN24 is trusted for its superior performance. Our EN24 round bars, ranging from 20mm diameter to 240mm diameter, are available in different conditions to suit your specific needs, including Hot Rolled, Annealed & Straightened, and Forged & Cold Drawn.

 

At KR STEEL UDYOG, we take pride in being a leading supplier of EN24 round bars. Each bar is meticulously tested and ultrasonically checked to ensure the highest quality and reliability. Whether you need EN24 for critical applications or demanding projects, rest assured that you're getting the best material at the best price. Elevate your engineering endeavors with EN24 Alloy Steel round bars from KR STEEL UDYOG. Contact us today to fulfill your requirements and experience the excellence of our products firsthand.

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Discover the strength and versatility of our Carbon Steel sheets, available in various sizes to suit your specific needs. With thicknesses ranging from 2mm to 6mm, widths of 1500mm and 2000mm, and lengths of 5 meters, our carbon steel sheets offer flexibility for a wide range of applications. We procure our EN8 sheets from trusted primary manufacturers like Evonith Steel (Lloyds)/Uttam Value, Tata Steel, and JSPL, ensuring top-notch quality and reliability. As a leading supplier of carbon steel sheets, we offer a comprehensive range of grades including EN8, C45, EN9, C55, and C60 sheets. Whether you need sheets for machining, fabrication, or structural purposes, trust us to deliver the perfect solution for your projects. 
Contact us today to discuss your requirements and get the best price for your carbon steel sheet needs.

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Introducing our range of high-quality peeled and ground steel bars, meticulously crafted through a combination of cold drawing, peeling, and grinding processes. We source our steel round bars exclusively from renowned main producers such as Bhushan, RINL, JSPL, ensuring top-notch raw materials.

Our peeled and ground steel bars exhibit exceptional dimensional accuracy and a smooth, polished surface finish. Through the cold drawing process, we enhance the mechanical properties of the steel, resulting in improved strength and toughness. The peeling process removes any surface imperfections or scale, while grinding ensures precise diameter and exceptional surface quality.

We offer a diverse selection of grades to meet your specific requirements. Our range includes renowned grades like SAE1018, EN8D, AISI 4140, 4340, and 8620, known for their excellent performance in various applications.

The applications of our peeled and ground bright bars are numerous and span across different industries. These precision bars are extensively used in the production of machined components, where their superior dimensional accuracy and smooth surface finish are vital. They are ideal for manufacturing fasteners, shafts, and axles, providing reliable performance and durability. In hydraulic and pneumatic systems, our bright bars contribute to the efficient operation of components such as piston rods, cylinders, and valves.

Moreover, our bright bars find utility in diverse sectors, including construction and architecture, where they are used for creating elegant handrails, balusters, and decorative elements. In the automotive industry, our bars are employed to manufacture crucial components like drive shafts, suspension parts, and steering system elements, ensuring optimal performance and longevity.

We take pride in our ability to deliver peeled and ground bright bars, as well as peeled and ground cold drawn bars, tailored to your specific needs and sizes. Whether you require exceptional surface finish, precise dimensions, or specific steel grades, we are here to fulfill your requirements. Reach out to us today to discuss your peeled and ground steel bar needs, and let us provide you with reliable solutions for your applications.