Comparable Standards
| Designation | Grade |
| DIN W.Nr. 1.2379 | X153CrMoV12 |
| AFNOR | Z160CDV12 |
| AISI/SAE | D2 |
| JIS | SKD11 |
Chemical Composition (wt %)
| C | Si | Mn | P (max) | S (max) | Cr | Mo | V |
| 1.50 – 1.60 | 0.10 – 0.40 | 0.15 – 0.45 | 0.03 | 0.03 | 11.0 – 12.0 | 0.60 – 0.80 | 0.90 – 1.10 |
Mechanical Properties (Annealed / Hardened)
| Property | Value |
| Hardness (annealed) | ~220 HB |
| Hardness (hardened) | 55 – 62 HRC |
| Impact Toughness | 77 J/cm² |
| Poisson’s Ratio | 0.27 – 0.30 |
| Modulus of Elasticity | 190 – 210 GPa |
Physical Properties
| Property | 20 °C | 100 °C | 200 °C | 300 °C |
| Coefficient of Thermal Expansion (10⁻⁶ m/m·K) | 10.6 | 11.5 | 11.8 | 12.3 |
| Thermal Conductivity (W/m·K) | 16.7 | 20.5 | 24.2 | – |
Heat Treatment Guidelines
**Annealing:** Heat to 840 – 870 °C, hold 2 min/mm, furnace cool to 600 °C, then air cool.
**Stress Relieving:** Heat to 650 – 700 °C, hold 2 min/mm, furnace cool.
**Hardening:** Preheat 750 – 800 °C; heat to 1000 – 1050 °C, hold 1 min/mm; quench in air, oil, or salt bath.
**Tempering:** Immediately double-temper at 500 – 550 °C (soak 1 h per 25 mm) for optimal toughness.
Tempering Hardness Chart
| Tempering Temp (°C) | 100 | 200 | 300 | 400 | 500 | 525 | 550 | 600 |
| Hardness (HRC) | 63 | 61 | 58 | 58 | 58 | 60 | 56 | 50 |
Typical Applications
– Threading rolls & dies
– Cold extrusion tools
– Trimming, cutting & stamping tools (sheet up to 6 mm)
– Precision cutting tools (sheet up to 12 mm)
– Cold pilger mandrels & circular-shear blades
– Deep-drawing dies & pressure pads
– Chipper knives, slitters, shear blades, punches
– High-wear plastic mould inserts & tyre shredders
Supply Formats & Services
– Stocked Shapes: Round bars (20 – 350 mm Ø), flats (25 × 50 – 200 × 500 mm), blocks (up to 2000 kg)
– Custom Cutting: Precision bandsaw cutting to your drawing
– Value-Added Services: In-house forging, heat treatment, ultrasonic & MPI testing, hardness & metallurgical analysis, pre-machining, surface grinding
Certifications & Quality Assurance
– Mill-Traceable Test Certificates (EN 10204 3.1)
– Ultrasonic & MPI Reports (ASTM A388 on request)
– Hardness, Grain-Size & Decarb Analysis
– ISO 9001:2015 (certification in process)
Logistics & Enquiry
Same-day Dispatch for stocked items from Kolkata. 24–48 hr turnaround on custom-sawn materials. Nationwide Delivery via trusted logistics partners.
Enquire Now: sales@ascforgings.com | +91-XX-XXXXXXX