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Carpenter 158, C-158 Case Hardening Steel Round Bar, Rods & Bars Carpenter 158, C-158 Case Hardening Steel Round Bar, Rods & Bars Carpenter 158, C-158 Case Hardening Steel Round Bar, Rods & Bars Carpenter 158, C-158 Case Hardening Steel Round Bar, Rods & Bars Carpenter 158, C-158 Case Hardening Steel Round Bar, Rods & Bars

Carpenter 158, C-158 Case Hardening Steel Round Bar, Rods & Bars

495.0 INR/Kilograms
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Product Details:

  • Length Custom/Standard Lengths (typically 3-6 meters or as required)
  • Standard ASTM, AISI, SAE (as applicable)
  • Processing Case Hardening, Machining, Cutting
  • Material Carpenter 158 (C-158) Case Hardening Steel
  • Technique Hot Rolled / Forged
  • Finish Peeled, Turned, or Smooth Finish
  • Grade C-158 / Carpenter 158
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Carpenter 158, C-158 Case Hardening Steel Round Bar, Rods & Bars Price And Quantity

  • 1 Kilograms
  • 495.0 INR/Kilograms

Carpenter 158, C-158 Case Hardening Steel Round Bar, Rods & Bars Product Specifications

  • Standard Tolerances (as per specification or request)
  • C-158 / Carpenter 158
  • Peeled, Turned, or Smooth Finish
  • Approx. 114.50 mm (commonly available in range 12mm to 300mm)
  • Engineering, Manufacturing, Case Hardening Components, Automotive, Tools
  • Custom/Standard Lengths (typically 3-6 meters or as required)
  • Round Bar, Rods, Bars
  • Case Hardening, Machining, Cutting
  • ASTM, AISI, SAE (as applicable)
  • Components requiring high surface hardness with ductile core
  • Hot Rolled / Forged
  • Carpenter 158 (C-158) Case Hardening Steel
  • India (as inferred from supplier stamp)
  • Loose or bundled as per requirement
  • Visible on End Face (for traceability)
  • Excellent for Case Hardening
  • Available in stock or cut to length as per order
  • Free from major surface defects, rust-protected
  • Green and White End Marking
  • Moderate (not stainless); generally oiled for protection

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 Case Hardening Capability

Carpenter 158 case hardening steel is specifically crafted for applications needing high surface hardness while preserving a tough, ductile core. This makes it an ideal choice for components that undergo intense wear but require impact resistance, such as gears, automotive parts, and tool components.


Guaranteed Traceability and Quality

Each bar is marked with a visible heat number on the end face to ensure material traceability throughout the manufacturing process. The green and white end markings further identify the material grade, while careful attention is paid to surface condition and protection against rust during storage and transit.


Tailored Dimensions and Finishes

C-158 round bars and rods are available in custom and standard lengths-typically 3 to 6 meters-and a range of diameters, commonly from 12mm to 300mm. Finishes such as peeled or turned enhance machinability, while tight tolerances can be achieved based on specific project requirements.

FAQ's of Carpenter 158, C-158 Case Hardening Steel Round Bar, Rods & Bars:


Q: How is Carpenter 158 C-158 steel round bar typically used in industry?

A: Carpenter 158 C-158 steel round bars are used for manufacturing components that require a hard, wear-resistant surface with a tough core, such as case-hardened gears, shafts, bushings, and automotive parts. They are widely used in engineering, manufacturing, and toolmaking sectors.

Q: What is the process for achieving case hardening with C-158 steel bars?

A: The process involves heat treating the C-158 steel to allow carbon to diffuse into the outer layer, typically through carburizing, followed by quenching and tempering. This results in a hardened outer surface while maintaining a ductile and tough core, essential for impact and fatigue resistance.

Q: When can I expect to receive C-158 round bars after placing an order?

A: Market availability is typically robust, with bars available in stock for prompt delivery or cut to length as per order requirements. Delivery times may vary depending on stock levels and custom specifications, but most suppliers can fulfill orders quickly.

Q: Where are these C-158 steel rods and bars manufactured?

A: These C-158 steel rods and bars are manufactured in India, as indicated by supplier stamps. India is a major hub for producing high-quality case hardening steels that meet international standards such as ASTM, AISI, and SAE.

Q: What benefits does C-158 case hardening steel offer over other grades?

A: C-158 case hardening steel delivers an excellent combination of surface hardness, wear resistance, and a ductile core. This balance ensures components are both durable under friction and impact-resistant, providing a longer service life than standard carbon steels.

Q: How are the steel bars packaged and protected during transit?

A: The bars are carefully packed either loose or bundled as per customer requirements and coated with oil to provide moderate corrosion protection. All products are quality-checked to be free from major surface defects and rust before dispatch.

Q: What are the standard sizes and tolerances for C-158 steel round bars?

A: C-158 steel round bars are available in standard lengths of 3 to 6 meters or can be cut as per order. Diameters range from approximately 12mm to 300mm, and tolerances are maintained as per standard specifications or specific customer requests.

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