English 
T: +86-0731-85185770
E: enquiry@qilumetal.com
E: enquiry@qilumetal.com
No. 18 Xiangfu Middle Road,Yuhua District, Changsha City
 |
| Quantity: | |
|---|---|
1.2343 is a widely recognized hot work tool steel that conforms to the German standard DIN 17350. It is renowned for its exceptional toughness, good wear resistance, and high thermal stability, making it suitable for applications involving high temperatures and mechanical stress. Due to its versatile properties and reliable performance, many countries have developed equivalent steels to DIN 1.2343. Such as the American standard H11 (ASTM A681), the international standard X37CrMoV5-1 （ISO 4957), the Japanese standard SKD6 (JIS G4404) and the Chinese standard 4Cr5MoSiV (GB/T 1299).
1.2343 steel contains chromium, molybdenum, and vanadium, which contribute to its high strength and resistance to thermal fatigue. The chromium content enhances its hardness and resistance to softening at elevated temperatures, while molybdenum and vanadium improve its wear resistance and overall durability. These properties make 1.2343 an ideal choice for manufacturing tools and components used in hot forging, extrusion, and die-casting processes.
1: Steel equivalent
Country | USA | ISO | Germany | China | Japan |
Standard | ASTM A681 | ISO 4957 | DIN17350 | GB/T1299 | JIS G4404 |
Grade | H11 | X37CrMoV5-1 | 1.2343 | 4Cr5MoSiV | SKD6 |
2: Chemical composition
Grade | C | Si | Mn | P | S | Cr | Mo | V |
H11 | 0.33-0.43 | 0.80-1.25 | 0.20-0.60 | 0.030Max | 0.030Max | 4.75-5.5 | 1.10-1.60 | 0.30-0.60 |
X37CrMoV5-1 | 0.33-0.41 | 0.80-1.20 | 0.25-0.50 | 0.030Max | 0.020Max | 4.8-5.5 | 1.10-1.50 | 0.30-0.50 |
1.2343 | 0.36-0.42 | 0.90-1.20 | 0.30-0.50 | 0.030Max | 0.030Max | 4.8-5.5 | 1.10-1.40 | 0.25-0.50 |
4Cr5MoSiV | 0.33-0.43 | 0.80-1.20 | 0.20-0.50 | 0.030Max | 0.030Max | 4.75-5.5 | 1.10-1.60 | 0.30-0.60 |
SKD6 | 0.32-0.42 | 0.80-1.20 | 0.50Max | 0.030Max | 0.020Max | 4.5-5.5 | 1.00-1.50 | 0.30-0.50 |
3: Surface hardness and hardenability.
Heat Treatment | Hardness |
Annealed (+A) | HB229Max |
Cold-drawn condition | HB262Max |
Hardening and Tempering (+HT) | HRC48 Min |
4: Supply size & Tolerance & Stock size
Product type | Size range | Length |
Hot rolled bar | Φ20-Φ200mm | 2000-5800mm |
Hot forged bar | Φ200-Φ600mm | 2000-5800mm |
Hot rolled plate/sheet | T:10-60mm; W:310-810mm | 2000-5800mm |
Hot forged plate | T:70-250mm; W:310-810mm | 2000-5800mm |
Hot Forged block | T: 260-500mm; W: 300-1000mm | 2000-5800mm |
Surface Finish | Turned | Milled | Grinding(Best) | Polished(Best) | Peeled(Best) | Black Forged | Black Rolled |
Tolerance | +0/+3mm | +0/+3mm | +0/+0.05mm | +0/+0.05mm | +0/+0.1mm | +0/+5mm | +0/+1mm |
Straighness | 1mm/1000mm max. | 3mm/1000mm max. | |||||
Qilu steel stock hot rolled bar and forged bars more than ten thousands tons every month, below our our stock size for round bars
20 | 25 | 30 | 35 | 40 | 45 | 50 | 55 | 60 | 65 | 70 | 75 | 80 | 85 | 90 |
95 | 100 | 105 | 110 | 115 | 120 | 130 | 140 | 150 | 160 | 170 | 180 | 190 | 200 |
Since the stocks change everyday, if you want to know our stock available information, please contact our salesman.
5: Ultrasonic Test
EN10228-3 class III or Sep 1921-84 D/D
6：Steel making & Forging processing
1): Steel making process:
EF+LF+VD
EAF+LF+VD
EF+LF+VD+ESR
EAF+LF+VD+ESR
2): Forging processing:
Put the 1.2343 ingot into the furnace and pre-heat to 700-800℃
Continue heating the ingot to initial temperature: 1050-1150℃
Forge the ingot, forging temperature should be not less than 850-900℃
Cooling in the sand after forging
7: Heat treatment
1): Annealed:
Heat 1.2343 steel to 840-880℃ in the furnace
Soak at this temperature in the furnace
Cooling in the furnace slowly
2): Quenching and tempering:
Preheat Temperature: 788℃
Heat 1.2343 steel to 1010-1030℃ in the salt bath furnace
Soak at this temperature in the furnace
Quench in oil
Temper steel at 540-560℃ in the furnace
Take out from furnace and cool in the air.
Above curve in figure is just a rough guide to the tempering behaviour of steels. When applying the curves for an estimation of the hardness which can be expected in quenched and tempered tools, it should be taken into account that the optimum heat-treatment conditions for the tools are not necessarily identical with those specified for the test pieces.
The heating time of test pieces in a salt batch shall be as give in below table:
Total heating time of test pieces in a salt bath
Nature of steel | Hardening Time min | Tempering Time min |
Cold or hot work steels | 25 +/- 1 | 60 |
High-speed steels | 3 | Minimum 2 periods of 60 each |
If the test pieces are not heated in a salt batch, the heating time must be extended accordingly, and the times for heating give above are not valid for thicker tools.
8：Application
1.2343 steel is a hot work mold steel with excellent high temperature strength, wear resistance, thermal fatigue resistance and toughness. The following are its main application uses.
Hot-Work Applications
1): Die Casting Dies: Used for aluminum, magnesium, and zinc alloy die casting.
2): Hot Forging Dies: Suitable for forging steel and non-ferrous metals.
3): Extrusion Dies: Used in aluminum and copper extrusion processes.
4): Hot Stamping Tools: Applied in the automotive industry for forming high-strength steel parts.
Plastic Molds
1): Injection Molds: Suitable for high-temperature plastic injection molding, especially for engineering plastics.
2): Compression Molds: Used for manufacturing plastic components under high pressure and temperature.
General Tooling
1): Shear Blades: Ideal for cutting hot materials, such as in steel mills.
2): Mandrels and Cores: Used in tube and pipe manufacturing due to their wear resistance.
3): Hot Runner Systems: Applied in plastic injection molding to maintain consistent material flow at high temperatures.
Cold-Work Applications
1): Cold Forming Dies: Used for cold extrusion and forming operations.
2): Punching and Blanking Tools: Suitable for high-precision cutting and punching.
1.2343 is a widely recognized hot work tool steel that conforms to the German standard DIN 17350. It is renowned for its exceptional toughness, good wear resistance, and high thermal stability, making it suitable for applications involving high temperatures and mechanical stress. Due to its versatile properties and reliable performance, many countries have developed equivalent steels to DIN 1.2343. Such as the American standard H11 (ASTM A681), the international standard X37CrMoV5-1 （ISO 4957), the Japanese standard SKD6 (JIS G4404) and the Chinese standard 4Cr5MoSiV (GB/T 1299).
1.2343 steel contains chromium, molybdenum, and vanadium, which contribute to its high strength and resistance to thermal fatigue. The chromium content enhances its hardness and resistance to softening at elevated temperatures, while molybdenum and vanadium improve its wear resistance and overall durability. These properties make 1.2343 an ideal choice for manufacturing tools and components used in hot forging, extrusion, and die-casting processes.
1: Steel equivalent
Country | USA | ISO | Germany | China | Japan |
Standard | ASTM A681 | ISO 4957 | DIN17350 | GB/T1299 | JIS G4404 |
Grade | H11 | X37CrMoV5-1 | 1.2343 | 4Cr5MoSiV | SKD6 |
2: Chemical composition
Grade | C | Si | Mn | P | S | Cr | Mo | V |
H11 | 0.33-0.43 | 0.80-1.25 | 0.20-0.60 | 0.030Max | 0.030Max | 4.75-5.5 | 1.10-1.60 | 0.30-0.60 |
X37CrMoV5-1 | 0.33-0.41 | 0.80-1.20 | 0.25-0.50 | 0.030Max | 0.020Max | 4.8-5.5 | 1.10-1.50 | 0.30-0.50 |
1.2343 | 0.36-0.42 | 0.90-1.20 | 0.30-0.50 | 0.030Max | 0.030Max | 4.8-5.5 | 1.10-1.40 | 0.25-0.50 |
4Cr5MoSiV | 0.33-0.43 | 0.80-1.20 | 0.20-0.50 | 0.030Max | 0.030Max | 4.75-5.5 | 1.10-1.60 | 0.30-0.60 |
SKD6 | 0.32-0.42 | 0.80-1.20 | 0.50Max | 0.030Max | 0.020Max | 4.5-5.5 | 1.00-1.50 | 0.30-0.50 |
3: Surface hardness and hardenability.
Heat Treatment | Hardness |
Annealed (+A) | HB229Max |
Cold-drawn condition | HB262Max |
Hardening and Tempering (+HT) | HRC48 Min |
4: Supply size & Tolerance & Stock size
Product type | Size range | Length |
Hot rolled bar | Φ20-Φ200mm | 2000-5800mm |
Hot forged bar | Φ200-Φ600mm | 2000-5800mm |
Hot rolled plate/sheet | T:10-60mm; W:310-810mm | 2000-5800mm |
Hot forged plate | T:70-250mm; W:310-810mm | 2000-5800mm |
Hot Forged block | T: 260-500mm; W: 300-1000mm | 2000-5800mm |
Surface Finish | Turned | Milled | Grinding(Best) | Polished(Best) | Peeled(Best) | Black Forged | Black Rolled |
Tolerance | +0/+3mm | +0/+3mm | +0/+0.05mm | +0/+0.05mm | +0/+0.1mm | +0/+5mm | +0/+1mm |
Straighness | 1mm/1000mm max. | 3mm/1000mm max. | |||||
Qilu steel stock hot rolled bar and forged bars more than ten thousands tons every month, below our our stock size for round bars
20 | 25 | 30 | 35 | 40 | 45 | 50 | 55 | 60 | 65 | 70 | 75 | 80 | 85 | 90 |
95 | 100 | 105 | 110 | 115 | 120 | 130 | 140 | 150 | 160 | 170 | 180 | 190 | 200 |
Since the stocks change everyday, if you want to know our stock available information, please contact our salesman.
5: Ultrasonic Test
EN10228-3 class III or Sep 1921-84 D/D
6：Steel making & Forging processing
1): Steel making process:
EF+LF+VD
EAF+LF+VD
EF+LF+VD+ESR
EAF+LF+VD+ESR
2): Forging processing:
Put the 1.2343 ingot into the furnace and pre-heat to 700-800℃
Continue heating the ingot to initial temperature: 1050-1150℃
Forge the ingot, forging temperature should be not less than 850-900℃
Cooling in the sand after forging
7: Heat treatment
1): Annealed:
Heat 1.2343 steel to 840-880℃ in the furnace
Soak at this temperature in the furnace
Cooling in the furnace slowly
2): Quenching and tempering:
Preheat Temperature: 788℃
Heat 1.2343 steel to 1010-1030℃ in the salt bath furnace
Soak at this temperature in the furnace
Quench in oil
Temper steel at 540-560℃ in the furnace
Take out from furnace and cool in the air.
Above curve in figure is just a rough guide to the tempering behaviour of steels. When applying the curves for an estimation of the hardness which can be expected in quenched and tempered tools, it should be taken into account that the optimum heat-treatment conditions for the tools are not necessarily identical with those specified for the test pieces.
The heating time of test pieces in a salt batch shall be as give in below table:
Total heating time of test pieces in a salt bath
Nature of steel | Hardening Time min | Tempering Time min |
Cold or hot work steels | 25 +/- 1 | 60 |
High-speed steels | 3 | Minimum 2 periods of 60 each |
If the test pieces are not heated in a salt batch, the heating time must be extended accordingly, and the times for heating give above are not valid for thicker tools.
8：Application
1.2343 steel is a hot work mold steel with excellent high temperature strength, wear resistance, thermal fatigue resistance and toughness. The following are its main application uses.
Hot-Work Applications
1): Die Casting Dies: Used for aluminum, magnesium, and zinc alloy die casting.
2): Hot Forging Dies: Suitable for forging steel and non-ferrous metals.
3): Extrusion Dies: Used in aluminum and copper extrusion processes.
4): Hot Stamping Tools: Applied in the automotive industry for forming high-strength steel parts.
Plastic Molds
1): Injection Molds: Suitable for high-temperature plastic injection molding, especially for engineering plastics.
2): Compression Molds: Used for manufacturing plastic components under high pressure and temperature.
General Tooling
1): Shear Blades: Ideal for cutting hot materials, such as in steel mills.
2): Mandrels and Cores: Used in tube and pipe manufacturing due to their wear resistance.
3): Hot Runner Systems: Applied in plastic injection molding to maintain consistent material flow at high temperatures.
Cold-Work Applications
1): Cold Forming Dies: Used for cold extrusion and forming operations.
2): Punching and Blanking Tools: Suitable for high-precision cutting and punching.
