Cart
0
jayantimpex12@gmail.com
+ Add Attachment
Call Us : 08045800544
Get a Quote
JIS SMnC420H Alloy Bar SMnC420H Round Bars SMnC420H Rods JIS SMnC420H Alloy Bar SMnC420H Round Bars SMnC420H Rods JIS SMnC420H Alloy Bar SMnC420H Round Bars SMnC420H Rods JIS SMnC420H Alloy Bar SMnC420H Round Bars SMnC420H Rods JIS SMnC420H Alloy Bar SMnC420H Round Bars SMnC420H Rods

JIS SMnC420H Alloy Bar SMnC420H Round Bars SMnC420H Rods

298.0 INR/Kilograms
Get a Price/Quote

Product Details:

  • Finish Bright, Polish, Black
  • Material Alloy Steel
  • Diameter 10 mm to 300 mm
  • Processing Rolled, Peeled, Ground
  • Specific Use Shafts, Machine Components, Forging
  • Length 3 Meter, 6 Meter or as Required
  • Type Bar, Round Bar, Rod
  • Click to view more
Request To Call Back Send Inquiry
X

JIS SMnC420H Alloy Bar SMnC420H Round Bars SMnC420H Rods Price And Quantity

  • 1 Kilograms
  • 298.0 INR/Kilograms

JIS SMnC420H Alloy Bar SMnC420H Round Bars SMnC420H Rods Product Specifications

  • 10 mm to 300 mm
  • JIS
  • H9, H10, H11 or as Required
  • Automobile, Engineering Industries, Manufacturing, Construction
  • Alloy Steel
  • Bright, Polish, Black
  • Bar, Round Bar, Rod
  • Hot Rolled
  • Shafts, Machine Components, Forging
  • 3 Meter, 6 Meter or as Required
  • Rolled, Peeled, Ground
  • SMnC420H
  • Ready Stock
  • 170-229 HB
  • Free from scale and cracks
  • Annealed or as required
  • Provided as per EN 10204/3.1B
  • Bundles with Strip, Wooden Box, or as per Requirement
  • Available as per customer drawing

Product Description

JIS SMnC420H is a structural, case-hardening (carburizing) alloy steel specified under the Japanese Industrial Standards (JIS G 4052). The "H" suffix is critical: it designates that the steel is manufactured to strict hardenability band requirements determined by Jominy end-quench tests.

This manganese-chromium alloy is specifically engineered for core toughness beneath a highly wear-resistant, hardened outer layer. Here is a technical overview of SMnC420H round bars, rods, and blanks.

1. Chemical Composition

SMnC420H relies primarily on a combination of manganese and chromium to achieve deep case-hardening capacity without resorting to high-cost nickel alloys.

Element Weight Percentage (%)
Carbon (C) 0.16% - 0.23%
Manganese (Mn) 1.15% -1.55%
Chromium (Cr) 0.35% - 0.70%
Silicon (Si) 0.15% -0.35%
Phosphorus (P) 0.030%
Sulfur (S) 0.030%
Copper (Cu) 0.30%

2. Material Characteristics & Case Hardening

Because it is a low-carbon alloy, SMnC420H in its raw annealed state is soft and exceptionally easy to machine, cold-form, or turn into complex geometry.

  • The Core: The low carbon content ($0.16% - 0.23%$) ensures that even after a rapid oil quench, the core of the bar retains high impact toughness and ductility, protecting components from fracturing under shock loads.

  • The Case: When exposed to a carburizing atmosphere (gas or vacuum carburizing at $900^circtext{C} - 950^circtext{C}$), the outer layer absorbs carbon. Subsequent quenching and low-temperature tempering yields a surface hardness typically reaching $58 - 62text{ HRC}$, providing premier resistance to abrasive and adhesive wear.

3. Global Cross-References

When translating material requirements from standard JIS callouts to regional alternatives, SMnC420H closely aligns with:

  • ISO / European Standard: 20MnCr5 (1.7147) A highly identical chemistry and widespread industry substitute.

  • USA (SAE / AISI): ~5120 or 8620 (Note: 5120 lacks the elevated manganese profile, while 8620 introduces a small amount of nickel/moly to achieve similar hardenability).

  • China (GB): 20CrMn

4. Round Bar Supply & Processing States

Depending on your precision requirements and machining setup, SMnC420H rods are typically sourced in these configurations:

Manufacturing & Thermal Conditions

  • Hot-Rolled / Forged Black Bar: Mill-finish state with an oxide surface. Ideal if you plan to heavily forge, upset, or rough-machine the profile.

  • Spheroidized Annealed: Treated to optimize microstructure for rapid machining on CNC automatic lathes.

  • Normalized: Refines grain structure, ensuring consistent structural movement during subsequent case hardening.

Surface States

  • Turned / Peeled: Bright bars stripped of mill scale to precise rough-machined diameters.

  • Cold Drawn / Centerless Ground: Tight dimensional tolerances for seamless feeding into automatic lathe collets.

5. Primary Industrial Applications

Due to its sweet-spot performance in high-wear, high-torque configurations, SMnC420H round bars are heavily utilized for:

  • Automotive & Drivetrain: Transmission gears, ring pinions, differential shafts, splines, and synchronizer hubs.

  • Heavy Clamping & Fastening: Heavy-duty double-bolted clamping components, high-tensile structural studs, and pins exposed to lateral shear forces.

  • Linkages: Kingpins, piston pins, universal joint journals, and high-load bushes.



Superior Quality Alloy Steel Bars

Our SMnC420H round bars and rods are produced using hot-rolled techniques, guaranteeing consistent structural integrity and durability. Each bar is meticulously finished-whether bright, polished, or black-matching the versatility of your project needs.


Customizable for Your Project

We offer extensive customization for dimensions, tolerances (H9, H10, H11), surface processing, and packaging. Whether you require a specific diameter, length, or finish, our experts work closely with clients to produce bars according to precise engineering drawings.


Trusted Choice for Multiple Industries

With ready stock and rapid delivery, our SMnC420H alloy bars cater to the swift pace of automobile, engineering, and construction industries. Each bar is inspected rigorously and comes with a certified test report, ensuring compliance with quality standards.

FAQ's of JIS SMnC420H Alloy Bar SMnC420H Round Bars SMnC420H Rods:


Q: How is the hardness range of SMnC420H alloy bars ensured during production?

A: The hardness of our SMnC420H bars, ranging from 170-229 HB, is controlled through annealing or specified thermal treatments during manufacturing, ensuring the bars meet precise mechanical requirements for your applications.

Q: What surface and finish options are available for SMnC420H round bars and rods?

A: We offer several surface conditions and finishes, including bright, polished, and black finishes, with all bars being free from scale and cracks. Processing options include rolled, peeled, and ground surfaces tailored to your specification.

Q: When can I expect delivery, and is there ready stock available for urgent orders?

A: We maintain ample ready stock of popular sizes and grades for fast dispatch. Custom sizes or special requirements may require a lead time, but our streamlined supply chain enables swift delivery across India.

Q: Where is customization available in the production of SMnC420H bars?

A: Customization is provided in dimensions (length, diameter), tolerance classes (H9, H10, H11), finishes, and packaging methods. You can submit engineering drawings for bespoke production according to your project needs.

Q: What is the process for obtaining a Test Certificate for these alloy bars?

A: Each batch is provided with a Test Certificate compliant with EN 10204/3.1B, ensuring traceability and confirming material properties, tested after manufacturing to ensure compliance with JIS standards.

Q: How are SMnC420H alloy bars used in various industries?

A: SMnC420H bars are widely employed in automobile parts, machine components, shafts, forging, and structural applications across engineering and manufacturing sectors due to their reliable mechanical properties and quality surface finishes.

Q: What are the main benefits of choosing SMnC420H bars from your company?

A: Our SMnC420H bars offer high strength, precision tolerances, certified quality, customization capability, and convenient packaging, making them a trusted choice for critical industry applications requiring dependable alloy steel solutions.

Tell us about your requirement
product

Price:

Quantity
Select Unit

  • 50
  • 100
  • 200
  • 250
  • 500
  • 1000+
Additional detail
Mobile number

Email

Other Products in 'Steel Bar' category

H13 ESR Hot Work Tool Steel Bar, H13 Die Steel Round Bars
Send Inquiry
EMS 35 (Timken Aerospace)
Send Inquiry
Stellite 4 (HS-4)
Send Inquiry
34CrNiMo6 Alloy Steel
Send Inquiry
SEND INQUIRY CALL ME FREE


Menu
JAYANT IMPEX
GST : 27AAQFJ5764L1ZJ
  • 6th, 605, Majestic Shopping Center, Jagannath Shankarseth Road, Girgaon,Mumbai - 400004, Maharashtra, India
  • Phone : 08045800544
  • Mr Shrenik Prakash Mehta (Director)
  • Mobile : 08045800544
Our Products
View All
  • trusted seller
    • Send Inquiry Send Inquiry
    Send SMS Send SMS
       
    Call Me Call Me Free
    JAYANT IMPEX PVT. LTD. All Rights Reserved.(Terms of Use)
    Developed and Managed by Infocom Network Private Limited. Terms of use | Returns Policy
    Member Tradeindia
    Back to top