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E: enquiry@qilumetal.com
E: enquiry@qilumetal.com
No. 18 Xiangfu Middle Road,Yuhua District, Changsha City
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1.2365 is a high-performance hot work tool steel standardized under the German DIN 17350. It is renowned for its exceptional toughness, wear resistance, and thermal fatigue resistance, making it suitable for demanding applications such as die-casting molds, forging dies, and extrusion tools. Due to its balanced properties, several countries have developed equivalent grades, including: H10 from the American standard ASTM A681, 32CrMoV12-28 from the International standard ISO 4957,SKD7 from the Japan standard JIS G4404, 4Cr3Mo3SiV from the China standard GB/T 1299.
1.2365 steel contains chromium, molybdenum, and vanadium, which contribute to its high-temperature strength, hardness retention, and resistance to softening.
1: Steel equivalent
Country | USA | ISO | Germany | China | Japan |
Standard | ASTM A681 | ISO 4957 | DIN17350 | GB/T1299 | JIS G4404 |
Grade | H10 | 32CrMoV12-28 | X32CrMoV33/1.2365 | 4Cr3Mo3SiV | SKD7 |
2: Chemical composition
Grade | C | Si | Mn | P | S | Cr | Mo | V |
H10 | 0.35-0.45 | 0.80-1.25 | 0.20-0.70 | 0.030Max | 0.030Max | 3.0-3.75 | 2.00-3.00 | 0.25-0.75 |
32CrMoV12-28 | 0.28-0.35 | 0.10-0.40 | 0.15-0.45 | 0.030Max | 0.020Max | 2.7-3.2 | 2.50-3.00 | 0.40-0.70 |
X32CrMoV33/1.2365 | 0.28-0.35 | 0.10-0.40 | 0.15-0.45 | 0.030Max | 0.030Max | 2.7-3.2 | 2.60-3.00 | 0.40-0.70 |
4Cr3Mo3SiV | 0.35-0.45 | 0.80-1.20 | 0.25-0.70 | 0.030Max | 0.030Max | 3.0-3.75 | 2.00-3.00 | 0.25-0.75 |
SKD7 | 0.28-0.35 | 0.10-0.40 | 0.15-0.45 | 0.030Max | 0.020Max | 2.7-3.2 | 2.50-3.00 | 0.40-0.70 |
3: Surface hardness and hardenability.
Heat Treatment | Hardness |
Annealed (+A) | HB229Max |
Cold-drawn condition | HB255Max |
Hardening and Tempering (+HT) | HRC46 Min |
4: Supply size & Tolerance & Stock size
Product type | Size range | Length |
Hot rolled bar | Φ10-Φ190mm | 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. | |||||
For 1.2365 steel, because we don’t use them in domestic market, so there is no stocks for that material.
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:
Pre-heat 1.2365 steel to 600-650℃. The billet should be heated slowly and uniformly to the forging temperature to avoid excessive temperature difference between inside and outside resulting in stress cracks.
Initial temperature: 1050-1100℃
Forge the ingot, forging temperature should be not less than 850℃
Cooling in the sand after forging
7: Heat treatment
1): Annealed:
Heat 1.2365 steel to 840-860℃
Cooling in the furnace (≤ 30°C/h) to below 500°C, followed by air cooling.
2): Quenching and tempering:
Preheat Temperature: 788℃
Heat 1.2365 steel to 1030-1050℃ in the salt bath furnace
Quench in oil
Temper steel at 540-560℃
Cooling in the air
Above curve in figure is the tempering properties of the steel.
8：Application
1.2365 is a high toughness, heat fatigue resistant hot work die steel, which is widely used in the following fields due to its excellent high temperature strength, wear resistance and resistance to thermal cracking:
1. Hot work molds
1) Die casting molds: die casting core, cavity, sprue bushing, ejector pin, slide, die holder.
2) Forging molds: forging dies (hammer forging, press forging dies), punches, concave dies.
3) Extrusion molds: extrusion cylinder, bushing, extrusion rod, mold inserts.
2) Plastic molds: die nuts, inserts, hot runner system components.
3. Other high temperature tools
1) Stamping dies: hot stamping of stainless steel plates.
2) Rolls: high temperature rolling aids.
3) Wear parts: such as hot shear blades.
1.2365 is a high-performance hot work tool steel standardized under the German DIN 17350. It is renowned for its exceptional toughness, wear resistance, and thermal fatigue resistance, making it suitable for demanding applications such as die-casting molds, forging dies, and extrusion tools. Due to its balanced properties, several countries have developed equivalent grades, including: H10 from the American standard ASTM A681, 32CrMoV12-28 from the International standard ISO 4957,SKD7 from the Japan standard JIS G4404, 4Cr3Mo3SiV from the China standard GB/T 1299.
1.2365 steel contains chromium, molybdenum, and vanadium, which contribute to its high-temperature strength, hardness retention, and resistance to softening.
1: Steel equivalent
Country | USA | ISO | Germany | China | Japan |
Standard | ASTM A681 | ISO 4957 | DIN17350 | GB/T1299 | JIS G4404 |
Grade | H10 | 32CrMoV12-28 | X32CrMoV33/1.2365 | 4Cr3Mo3SiV | SKD7 |
2: Chemical composition
Grade | C | Si | Mn | P | S | Cr | Mo | V |
H10 | 0.35-0.45 | 0.80-1.25 | 0.20-0.70 | 0.030Max | 0.030Max | 3.0-3.75 | 2.00-3.00 | 0.25-0.75 |
32CrMoV12-28 | 0.28-0.35 | 0.10-0.40 | 0.15-0.45 | 0.030Max | 0.020Max | 2.7-3.2 | 2.50-3.00 | 0.40-0.70 |
X32CrMoV33/1.2365 | 0.28-0.35 | 0.10-0.40 | 0.15-0.45 | 0.030Max | 0.030Max | 2.7-3.2 | 2.60-3.00 | 0.40-0.70 |
4Cr3Mo3SiV | 0.35-0.45 | 0.80-1.20 | 0.25-0.70 | 0.030Max | 0.030Max | 3.0-3.75 | 2.00-3.00 | 0.25-0.75 |
SKD7 | 0.28-0.35 | 0.10-0.40 | 0.15-0.45 | 0.030Max | 0.020Max | 2.7-3.2 | 2.50-3.00 | 0.40-0.70 |
3: Surface hardness and hardenability.
Heat Treatment | Hardness |
Annealed (+A) | HB229Max |
Cold-drawn condition | HB255Max |
Hardening and Tempering (+HT) | HRC46 Min |
4: Supply size & Tolerance & Stock size
Product type | Size range | Length |
Hot rolled bar | Φ10-Φ190mm | 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. | |||||
For 1.2365 steel, because we don’t use them in domestic market, so there is no stocks for that material.
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:
Pre-heat 1.2365 steel to 600-650℃. The billet should be heated slowly and uniformly to the forging temperature to avoid excessive temperature difference between inside and outside resulting in stress cracks.
Initial temperature: 1050-1100℃
Forge the ingot, forging temperature should be not less than 850℃
Cooling in the sand after forging
7: Heat treatment
1): Annealed:
Heat 1.2365 steel to 840-860℃
Cooling in the furnace (≤ 30°C/h) to below 500°C, followed by air cooling.
2): Quenching and tempering:
Preheat Temperature: 788℃
Heat 1.2365 steel to 1030-1050℃ in the salt bath furnace
Quench in oil
Temper steel at 540-560℃
Cooling in the air
Above curve in figure is the tempering properties of the steel.
8：Application
1.2365 is a high toughness, heat fatigue resistant hot work die steel, which is widely used in the following fields due to its excellent high temperature strength, wear resistance and resistance to thermal cracking:
1. Hot work molds
1) Die casting molds: die casting core, cavity, sprue bushing, ejector pin, slide, die holder.
2) Forging molds: forging dies (hammer forging, press forging dies), punches, concave dies.
3) Extrusion molds: extrusion cylinder, bushing, extrusion rod, mold inserts.
2) Plastic molds: die nuts, inserts, hot runner system components.
3. Other high temperature tools
1) Stamping dies: hot stamping of stainless steel plates.
2) Rolls: high temperature rolling aids.
3) Wear parts: such as hot shear blades.
