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Special Steel Includes Cold Work Steel, Hot Work Steel, Plastic Mould Steel, High Speed Steel, High Strength Steel, Abrasion Resistant Steel. These tool materials adhere to great quality demands of steel like temper, strength, toughness, resistance to tempering, hardening capacity, dimensional stability etc. The range of Tool Steel in our store includes products from renowned manufacturers.
STEELW.NR. 1.2343|H11 Steel
W.NR. 1.2343 or H11 tool steel is one of the most widely used hot work tool steels for manufacturing forging dies, pressure die casting dies, extrusion tools, hot punches, and plastic moulds. Its ability to retain hardness under repeated heating and cooling cycles helps improve tool life, reduce maintenance costs, and maintain production consistency.
Sandeep Edgetech is a leading manufacturer, supplier, stockist, and distributor of W.NR. 1.2343 (AISI H11) hot work tool steel in India. This premium chromium-molybdenum-vanadium alloy steel is designed to deliver outstanding toughness, thermal fatigue resistance, and dimensional stability in demanding high-temperature environments.
Main characteristics and applications
Hot working special steel with high wear resistance associated with special thermal fatigue properties.
Steel can be air hardened or pressure gas (vacuum) which makes it possible to reduce distortion and cracks caused by heat treatment. At working hardness of 50HRC excellent toughness and is therefore suitable for use in a wide field of operating condition.
This steel is used for tools as:
• dies for the pressure casting of light alloys.
• wear resistance moulds for plastic processing.
• dies for friction and mechanical presses for hot forming of steel, brass, aluminum and its alloys.
• extrusion dies for aluminum processing.
• hot work shear blades.
To raise lifetime of tools this steel can be submitted to surface treatment as thermo-chemical treatments on the tools or nitriding (ion – saline – gaseous).
Comparable standards
| DIN | W.Nr | AFNOR | AISI/ASIM | JIS |
|---|---|---|---|---|
| X38CrMov5-1 | 1.2343 | Z38CDV5 | H-11 | SKD6 |
Chemical composition (typical; in weight %)
| C | Si | Mn | P (max) | S (max) | Cr | Mo | V |
|---|---|---|---|---|---|---|---|
| 0.33-0.41 | 0.80-1.20 | 0.25-0.50 | 0.03 | 0.03 | 4.80-5.50 | 1.10-1.50 | 0.30-0.50 |
Critical points
Ac1 840 °C
Ac3 880 °C
Ms 260 °C
Production technology
EAF – LF – VD - Forging – Heat treatment +EFS
US specification
In according to standard EN10228-3 Class 4 and standard SEP 1921 Class E/e
Delivery condition
WW.NR. 1.2343 is delivered in annealed condition (EFS), with hardness max 230 HB (21 HRC)
Physical properties (reference values)
| 20°C | 100°C | 250°C | 500°C | |
|---|---|---|---|---|
| Thermal expansion coefficient (10-6/K) | 11.3 | 11.7 | 12.1 | 13.2 |
| Thermal conductivity (W/mk) | 18.8 | 19 | 22.9 | 24.9 |
| Young modulus (Kn/mm2) | 212 | 209 | 197 | 175 |
Heat treatment
| TREATMENT | TEMPERATURE | HOLDING TIME (HT) | COOLING | COMMENTS | |
|---|---|---|---|---|---|
| Annealing | Heat to 850 °C | Min. H.T. for 2 minute /mm | Furnace up to 550°C than in air | - | |
| Stress relieving | Heat to 650-700°C | Min. H.T. for 2 minute /mm | furnace up to 300-350°C | To be carried out after machining, is recommended to eliminate the residual stresses induced by mechanical working | |
| Hardening | Preheating to 350-400°C Second preheating to 750-850°C Heat to hardening temperature to 1000-1020°C | Min. H.T. for 1 minute /mm | Air or pressure gas by vacuum | Quenched hardness 52-56HRC | |
| Tempering | In the range 550 – 600°C for at least 3 h according to hardness requirements and conditions of use. Tempering must be repeated a second time at a temperature equal to or 20°C lower than the previous. Before tempering, the parts must be preheated to 200 – 300°C | Air | Usual service hardness: 48-52 HRC | ||
C.C.T. curve
Tempering curve
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