What is Case Hardening?

Case hardening is a heat treatment process designed to harden the surface of metal components while maintaining a softer, ductile core. This technique enhances wear resistance on the exterior without compromising the toughness and shock absorption capabilities of the internal structure. Through either the diffusion of alloying elements or phase transformation at high temperatures, the outer layer of the metal becomes significantly harder than the inner core.

Case hardening is typically performed after machining or forming since hardened metals can be challenging to work with.

Why Choose Case Hardening?

• Efficiency: Surface hardening consumes less energy and time compared to through-hardening an entire component.

• Performance: A hard surface resists abrasion, while a tough core resists fracture under impact.

• Cost-Effective: Reduced material consumption and machining effort lead to cost savings in large-scale production.

Metals Suitable for Case Hardening

Although primarily applicable to ferrous metals, case hardening can also be used on select titanium and aluminum alloys. Commonly treated materials include:

• Low carbon steel

• High carbon steel

• Alloy steels

• Tool steels

• Stainless steels

• Forged iron

Common Applications of Case-Hardened Components

• Gears

• Camshafts

• Pins

• Shafts

• Fasteners

• Bearings

• Rods

• Transmission parts

1. 20MnCr5 Case Hardening Steel

Overview:
20MnCr5 is a chromium alloyed case-hardening steel with excellent wear resistance, ductility, and fatigue strength. Its fine grain structure makes it ideal for high-performance components.

Physical Properties:

Hardness: ~218 HRC

Applications: Axles, camshafts, driving pinions, universal joints, arbors, and other wear-resistant mechanical parts.

Other Available Grades:

C45, EN8, EN9, EN19, EN24, EN31, EN36C, EN41B, EN47, IS2062, 42CrMo4, HCHCR, OHNS, D2, D3, H11, H13, M2, M35, M42, M48, 1.2714, SKD11, P20, P20+S, P20+Ni, P20+Ni+HH, SAE 4140, SAE 4340, 16MnCr5, C35, C40, C50, C60, CK45, 40C8, 45C8, 55C8, C55Mn75, SAE 52100, S40C, S355J2G3.

Areas We Serve

Uttar Pradesh:

Kanpur, Lucknow, Noida, Agra, Meerut, Varanasi, Ghaziabad, Gorakhpur, Aligarh, and over 60 more cities.

Rajasthan:

Jaipur, Jodhpur, Kota, Bikaner, Udaipur, Ajmer, Bhilwara, Alwar, and more.

Haryana:

Faridabad, Gurgaon, Panipat, Hisar, Rohtak, Yamunanagar, Karnal, and others.

Why choose Steel Mart as a C45 Carbon Steel Supplier?

• Certified Premium Quality: They provide high-quality, often ISI-certified C45 Carbon Steel Supplier with complete documentation like Mill Test Certificates (MTCs), ensuring guaranteed chemical composition and mechanical properties.
• Value-Added Processing: They offer essential services like cut-to-size options and processing (machining, grinding) tailored to your exact specifications, which minimizes your processing time and scrap.
• Reliable Supply & Logistics: They maintain a ready and extensive stock of C45 steel in various forms and boast a strong supply chain network for fast, on-time delivery.
• Industry Experience & Trust: With a long-standing legacy (often cited as 50+ years), they bring deep technical expertise and a trusted reputation for reliability and honest business practices.
• Technical Support & Guidance: Their team provides valuable technical advice and consultation on material selection, heat treatment, and fabrication, acting as a supportive partner for your project.