About Us

H12 Die Steel, also known as ASTM/AISI H12, is a high-quality hot work tool steel designed for demanding applications. This steel grade is renowned for its excellent impact toughness and resistance to thermal fatigue cracking. It contains chromium and tungsten, which enhance its ability to withstand high temperatures and thermal shock, making it suitable for various hot working processes.

H12 Die Steel has a lower vanadium content compared to H13, but its tungsten content improves its temper resistance. It’s known for its ability to resist cracking and deformation under heat, especially when water-cooled during use. This makes it ideal for applications such as hot punches, die casting dies, shaping dies, hot shear blades, gripper dies, and extrusion tooling.

H12 Die Steel Round Bar Supplier

Amardeep Steel is supplier of  H12 Die Steel Round Bar for construction, offering a reliable solution for hot tooling needs where resistance to cracking and thermal shock is crucial. This steel provides durability and performance in high-temperature environments, making it a popular choice for various industrial applications.

 H12 Die Steel Round Bar Specification 

Specification Diameter (mm) Length (mm) Thickness (mm) Width (mm) Length (mm)
Round Bar 70 ~ 600 2000 ~ 6000      
Plate     25 ~ 400 100 ~ 810 2000 ~ 5800

H12 Die Steel Chemical Composition 

Element Composition (%)
Carbon (C) 0.28 - 0.55
Manganese (Mn) 0.15 - 0.45
Silicon (Si) 0.10 - 0.40
Chromium (Cr) 2.70 - 3.20
Molybdenum (Mo) 2.60 - 3.00
Vanadium (V) 0.40 - 0.70
Phosphorus (P) ≤0.030
Sulfur (S) ≤0.030

H12 Die Round Bar Mechanical Properties 

Property Value
Modulus of Elasticity [103 x N/mm²] 207
Density [g/cm³] 7.84
Thermal Conductivity [W/m·K] 18.9
Coefficient of Linear Thermal Expansion (10⁻⁶ °C⁻¹)  
20-100°C 9.8
20-200°C 11
20-400°C 12.1
20-600°C 13

 H12 Round Bar Physical Properties

Coefficient of thermal expansionat °C 20-100 20-250 20-500
10-6 m/(m*K) 11.7 12.4 12.9
Thermal Conductivity at °C 20 250 500
W/(m*K) 24.2 25.6 28.0

 H12 Die Steel Round Bar Heat Treatment

Soft annealing °C Cooling Hardness HB
820 Furnace max. 240
Hardening °C Quenching Hardness after quenching HRC
1030 – 1130 Oil or hot bath, 500 – 550 °C

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H12 Die Steel Round Bar Application 

  • Forming Dies
  • Press Dies
  • Hot Shear
  • Intermediate Roller for Cold Rolling

We Supply Globally

We Supply Our H12 Die Steel Round Bar  to various countries like Mexico, Ireland, Oman, India, Russia, Algeria, Turkey, Bahrain, China, Trinidad & Tobago, Austria, Qatar, Ecuador, United Arab Emirates, Poland, Jordan, Libya, Philippines, Hungary, Nigeria, Bulgaria, Indonesia, Chile, Macau, Colombia, Croatia, Germany, Ghana, Argentina, South Africa, Greece, Switzerland, Hong Kong, Kuwait, France, Italy, Costa Rica, Kenya, Namibia, Azerbaijan, Japan, Venezuela, Morocco, Brazil, New Zealand, United Kingdom, Canada, Mexico, Bolivia, Romania, Iraq, Tibet, Angola, Chile, Estonia, Puerto Rico, South Korea, Nigeria, Finland, Tunisia, Slovakia, Vietnam, Egypt, Lithuania, Czech Republic, Bhutan, Peru, Zimbabwe, Ukraine, Australia, Gabon, Taiwan, Sri Lanka, Thailand, Lebanon, Kazakhstan, Belarus, Gambia, Norway, Netherlands, Bangladesh, Sweden, Pakistan, Serbia, Iran, Iran, Nepal, Spain, Poland, Yemen, United States, Singapore, Malaysia, Israel, Mongolia, Belgium, Afghanistan, Denmark, Portugal, Saudi Arabia.

We Supply Worldwide

We Supply Our H12 Die Steel Round Bar  to various cities like Toronto, Al Khobar, Chandigarh, Haryana, Perth, Algiers, Ahvaz, Ulsan, Moscow, Istanbul, Howrah, Singapore, Ho Chi Minh City, Port-of-Spain, London, Rajkot, New York, New Delhi, Nagpur, Kuwait City, Karachi, Surat, Ernakulam, Gimhae-si, Granada, Kanpur, Kolkata, Lahore, Madrid, Visakhapatnam, Secunderabad, Bangkok, Mumbai, Coimbatore, Bogota, Milan, Tehran, Ranchi, Pimpri-Chinchwad, Montreal, Colombo, Bhopal, Seoul, Edmonton, Aberdeen, Caracas, Busan, Brisbane, Sydney, Calgary, Sharjah, Rio de Janeiro, Chennai, Chiyoda, Geoje-si, Jakarta, Thiruvananthapuram, Courbevoie, Riyadh, Indore, Jeddah, Hyderabad, Kuala Lumpur, Baroda, Ankara, Mexico City, Dubai, Gurgaon, Vung Tau, Lagos, Al Jubail, Melbourne, Los Angeles, Petaling Jaya, Bengaluru, Atyrau, Jamshedpur, Santiago, Hanoi, Thane, Pune, Doha, Faridabad, Vadodara, La Victoria, Muscat, Ludhiana, Jaipur, Navi Mumbai, Houston, Ahmedabad, Dammam, Manama, Nashik, Cairo, Abu Dhabi, Hong Kong, Dallas, Noida.