DIN 1.2735 Case Hardening Steel Round Bar Rods

DIN 1.2735 Case Hardening Steel Round Bar Rods

Name: DIN 1.2735 Case Hardening Steel Round Bar Rods
Brand: JAYANT IMPEX
Price: 548.0 INR
Availability: InStock

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Product Details:

Application Used in manufacturing of machine components, automotive parts, and engineering applications where surface hardness and core toughness are essential.
Diameter Ranging from 16mm to 500mm or as required
Grade 1.2735 / 40CrMnNiMo8-6-4
Material DIN 1.2735 Case Hardening Steel
Standard DIN 1.2735
Technique Hot Rolled / Forged
Tolerance h10, h11 or as per requirement
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DIN 1.2735 Case Hardening Steel Round Bar Rods Price And Quantity

Minimum Order Quantity 1 Kilograms
Price 548.0 INR/Kilograms

DIN 1.2735 Case Hardening Steel Round Bar Rods Product Specifications

Specific Use Applications requiring high wear resistance and improved machinability, such as gears, shafts, and tool parts.
Grade 1.2735 / 40CrMnNiMo8-6-4
Material DIN 1.2735 Case Hardening Steel
Diameter Ranging from 16mm to 500mm or as required
Type Round Bar Rods
Standard DIN 1.2735
Processing Case Hardening (Carburizing, Quenching, and Tempering)
Tolerance h10, h11 or as per requirement
Technique Hot Rolled / Forged
Length Custom lengths available (typically 3-6 meters or as specified)
Finish Peeled, Turned, or Black
Application Used in manufacturing of machine components, automotive parts, and engineering applications where surface hardness and core toughness are essential.

Tensile Strength Typically 700-1100 MPa (depending on treatment)
Surface Condition Bright, Peeled, Black
Delivery Condition Pre-Machined, Annealed, or Hardened + Tempered
Yield Strength Approximately 400-700 MPa
Machinability Improved compared to similar grades due to alloy content
Elongation Between 10-18% (in annealed condition)
Weldability Fair (special electrodes and preheating required)
Hardness (After Hardening) Up to 60 HRC depending on heat treatment
Density 7.85 g/cm3
Impact Strength Good toughness, suited for impact-loaded parts
Chemical Composition C: 0.36-0.42%, Cr: 1.80-2.20%, Mn: 0.40-0.80%, Ni: 1.80-2.20%, Mo: 0.15-0.30%, Si: 0.10-0.40%, P 0.025%, S 0.035%

Product Description

1. Material Identification and Cross References

DIN Standard Designation: DIN 1.2735
DIN Symbol Name: 15NiCr14 / 14NiCr14
Material Category: Heavy-Duty Nickel-Chromium Case-Hardening Steel
EN/ISO Standard: EN ISO 4957 / EN 10084
AFNOR (France): 14NC11 / 15NC11
AISI/SAE (USA) Equivalent: AISI P6 / Carpenter 158 / UNS T51606
GOST (Russia): 15Kh2GN2 / 12KhN3A
BS (UK): 655M13 (EN36B equivalent family)

2. Chemical Composition (Nominal Mass Percent)

Carbon: 0.12 to 0.17
Nickel: 3.20 to 3.70
Chromium: 0.80 to 1.10
Manganese: 0.40 to 0.70
Silicon: 0.15 to 0.35
Phosphorus: Maximum 0.025
Sulfur: Maximum 0.025
Iron: Balance

3. Physical Properties

Density: 7.85 grams per cubic centimeter
Specific Gravity: 7.85
Modulus of Elasticity: 210 GPa
Thermal Conductivity: 34.0 W/m K at room temperature
Specific Heat Capacity: 460 J/kg K
Coefficient of Thermal Expansion: 11.5 x 10^-6 per degree Celsius (20 to 100 degrees Celsius)

4. Mechanical Properties

Annealed Supply Hardness: Maximum 229 HBW (Brinell)
Core Tensile Strength (Quenched and Tempered): 1000 to 1300 MPa
Core Yield Strength (0.2% offset): Minimum 780 MPa
Elongation at Fracture (A5): Minimum 10 percent
Impact Energy (Charpy-V): Minimum 40 Joules
Achievable Case Surface Hardness: 58 to 62 HRC (after carburizing, oil quenching, and tempering)

5. Heat Treatment Parameters

Hot Forming (Forging/Rolling): 850 to 1150 degrees Celsius
Soft Annealing: 650 to 700 degrees Celsius followed by slow furnace cooling
Carburizing Temperature: 880 to 930 degrees Celsius
Core Hardening (First Quench): 850 to 880 degrees Celsius in oil or water
Case Hardening (Second Quench): 780 to 820 degrees Celsius in oil
Stress Relieving / Tempering: 150 to 200 degrees Celsius for a minimum of 1 hour per 25 mm section thickness

6. Manufacturing and Supply Specifications

Available Formats: Hot Rolled Round Bars, Cold Drawn Wire/Rods, Forged Round Blocks, Precision Shafting
Diameter Range: 10 mm to 600 mm (Standard Stocking: 16 mm to 350 mm)
Supply Condition: Soft Annealed (+A), Normalized (+N), or Treated for Machinability (+S)
Surface Finishes: Black As-Rolled/Forged, Peeled/Turned, Centerless Ground, Bright Drawn
Ultrasonic Testing: SEP 1921 Group 3 Class C/c or E/e compliance available upon request

7. Primary Industrial Applications

Heavy-duty drive gears, crown wheels, and differential pinions
Highly stressed shafts, splines, axles, and transmission components
Plastic injection molds requiring high core strength and polished case finish
Pneumatic hammer parts, rock drilling tools, and heavy machinery ratchets
High-tensile structural fasteners, pins, and heavy-duty clamping components

Exceptional Hardness and Durability

DIN 1.2735 round bar rods can achieve surface hardness up to 60 HRC through heat treatment processes, making them ideal for applications requiring high wear resistance. Their balanced alloy content provides both surface strength and core toughness, ensuring long-term durability in demanding engineering environments.

Versatile Delivery and Surface Options

Available in a variety of surface finishes including bright, peeled, and black, these rods can be provided in different delivery conditions such as pre-machined, annealed, or hardened and tempered. This flexibility allows users to choose the most suitable option for their specific manufacturing processes, from automated machining to custom fabrication.

Tailored Applications for Engineering Excellence

DIN 1.2735 is extensively used in applications where both surface hardness and a tough core are essential. Typical uses include the production of gears, shafts, tool parts, and automotive components. Its improved machinability, good weldability (with proper technique), and high tensile strength make it a preferred choice in precision engineering and automotive industries.

FAQ's of DIN 1.2735 Case Hardening Steel Round Bar Rods:

Q: What are the main applications of DIN 1.2735 Case Hardening Steel Round Bars?

A: DIN 1.2735 round bars are typically used in the production of gears, shafts, tool parts, and automotive components where high surface hardness and core toughness are crucial. Their properties suit demanding engineering and machine-building applications.

Q: How is the case hardening process performed on 1.2735 steel rods?

A: Case hardening for DIN 1.2735 rods involves carburizing the surface, followed by quenching and tempering. This sequence develops a hard, wear-resistant surface layer while preserving a tough, ductile core, suitable for impact-loaded parts.

Q: When should I choose annealed or pre-machined delivery conditions?

A: Annealed DIN 1.2735 rods are best for extensive machining or further heat treatment, while pre-machined bars are prepared for finishing operations, saving time and labor in manufacturing. Select based on your specific fabrication requirements.

Q: Where can I source DIN 1.2735 round bars in India?

A: DIN 1.2735 round bars are available from various dealers, exporters, fabricators, manufacturers, producers, retailers, suppliers, and traders across India. Custom sizes and finishes can be provided upon request to meet specific project needs.

Q: What are the benefits of using DIN 1.2735 steel for machine components?

A: The key benefits include high wear resistance after hardening, enhanced machinability due to alloy composition, good impact strength, and reliable performance in parts exposed to repeated loads and shocks.

Q: How does the machinability of DIN 1.2735 compare to similar steels?

A: DIN 1.2735 offers improved machinability over similar case hardening steels because of its balanced alloying elements, allowing for easier and more efficient cutting, turning, and milling processes.

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