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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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1.2842 is a widely recognized cold work tool steel that conforms to the German standard DIN 17350. It is known for its high wear resistance, good toughness, and excellent dimensional stability after heat treatment. Due to its reliable performance in demanding applications, many countries have established equivalent grades for 1.2842, such as: O2 from American standard ASTM A681, 90MnCrV8 from European standard EN ISO 4957, 9Mn2V from Chinese standard GB/T 1299.
1.2842 steel contains manganese and chromium, which enhance its hardness and wear resistance, while a small amount of vanadium refines the grain structure, improving toughness. The moderate carbon content ensures a good balance between machinability and hardness, making it suitable for blanking dies, forming tools, and precision cutting applications.
1: Steel equivalent
Country | USA | ISO | Germany | China |
Standard | ASTM A681 | ISO 4957 | DIN17350 | GB/T1299 |
Grade | O2 | 90MnCrV8 | 1.2842 | 9Mn2V |
2: Chemical composition
Grade | C | Si | Mn | P | S | Cr | Mo | V |
O2 | 0.85-0.95 | 0.50Max | 1.40-1.80 | 0.030Max | 0.030Max | 0.50Max | 0.30Max | 0.30Max |
90MnCrV8 | 0.85-0.95 | 0.10-0.40 | 1.80-2.20 | 0.030Max | 0.030Max | 0.2-0.5 | / | 0.05-0.20 |
1.2842 | 0.85-0.95 | 0.10-0.40 | 1.90-2.10 | 0.030Max | 0.030Max | 0.2-0.5 | / | 0.05-0.15 |
9Mn2V | 0.85-0.95 | 0.8-1.2 | 1.70-2.00 | 0.030Max | 0.030Max | / | / | 0.10-0.25 |
3: Surface hardness and hardenability.
Heat Treatment | Hardness |
Annealed (+A) | HB229Max |
Cold-drawn condition | HB241Max |
Hardening and Tempering (+HT) | HRC60 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:6-80mm; 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 hot rolled plate, below our our stock size.
1): Stock diameter for hot rolled bar
12 | 15 | 18 | 20 | 22 | 25 | 28 | 30 | 32 | 35 | 40 | 45 | 50 | 55 | 60 |
65 | 70 | 75 | 80 | 85 | 90 | 95 | 100 | 110 | 120 | 130 | 140 | 150 | 160 | 170 |
180 | 190 | 200 |
2) : Stock thickness for hot rolled plate
6 | 8 | 10 | 12 | 14 | 16 | 18 | 20 | 25 | 30 |
35 | 40 | 45 | 50 | 55 | 60 | 65 | 70 | 75 | 80 |
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 1.2842 ingot into the furnace and pre-heat to 650-750℃
Continue heating the ingot to initial temperature: 1050-1100℃
Forge the ingot, forging temperature should be not less than 800-850℃
Cooling in the furnace or in the ash after forging
7: Heat treatment
1): Annealed:
Heat 1.2842 steel to 780-820℃ in the furnace
Soak at this temperature in the furnace
Cooling in the furnace slowly
2): Quenching and tempering:
Preheat Temperature: 649℃
Heat 1.2842 steel to 780-800℃ in the salt bath furnace
Soak at this temperature in the furnace
Quench in oil
Temper steel at 170-190℃ 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
1.2842 is a high carbon low alloy cold work tool steel, with excellent wear resistance, good toughness and heat treatment stability, it is widely used in the following fields:
1. Cold Work Tooling
1) Stamping Tooling: stamping low carbon steel, copper alloy, aluminum plate and other thin plates (thickness <3mm), electronic shell, hardware punching mold.
2) Forming Dies: bending, deep drawing dies.
3) Shearing Tools: for paper, plastic, thin metal plate precision shear.
2. Cutting and Measuring Tools: wear-resistant measuring tools such as card gauges and plug gauges, taps, drills , woodworking tools.
3. Wear-resistant Mechanical Parts: guide bushings, bearing cages, textile machinery parts (such as wear-resistant guide needles).
1.2842 is a widely recognized cold work tool steel that conforms to the German standard DIN 17350. It is known for its high wear resistance, good toughness, and excellent dimensional stability after heat treatment. Due to its reliable performance in demanding applications, many countries have established equivalent grades for 1.2842, such as: O2 from American standard ASTM A681, 90MnCrV8 from European standard EN ISO 4957, 9Mn2V from Chinese standard GB/T 1299.
1.2842 steel contains manganese and chromium, which enhance its hardness and wear resistance, while a small amount of vanadium refines the grain structure, improving toughness. The moderate carbon content ensures a good balance between machinability and hardness, making it suitable for blanking dies, forming tools, and precision cutting applications.
1: Steel equivalent
Country | USA | ISO | Germany | China |
Standard | ASTM A681 | ISO 4957 | DIN17350 | GB/T1299 |
Grade | O2 | 90MnCrV8 | 1.2842 | 9Mn2V |
2: Chemical composition
Grade | C | Si | Mn | P | S | Cr | Mo | V |
O2 | 0.85-0.95 | 0.50Max | 1.40-1.80 | 0.030Max | 0.030Max | 0.50Max | 0.30Max | 0.30Max |
90MnCrV8 | 0.85-0.95 | 0.10-0.40 | 1.80-2.20 | 0.030Max | 0.030Max | 0.2-0.5 | / | 0.05-0.20 |
1.2842 | 0.85-0.95 | 0.10-0.40 | 1.90-2.10 | 0.030Max | 0.030Max | 0.2-0.5 | / | 0.05-0.15 |
9Mn2V | 0.85-0.95 | 0.8-1.2 | 1.70-2.00 | 0.030Max | 0.030Max | / | / | 0.10-0.25 |
3: Surface hardness and hardenability.
Heat Treatment | Hardness |
Annealed (+A) | HB229Max |
Cold-drawn condition | HB241Max |
Hardening and Tempering (+HT) | HRC60 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:6-80mm; 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 hot rolled plate, below our our stock size.
1): Stock diameter for hot rolled bar
12 | 15 | 18 | 20 | 22 | 25 | 28 | 30 | 32 | 35 | 40 | 45 | 50 | 55 | 60 |
65 | 70 | 75 | 80 | 85 | 90 | 95 | 100 | 110 | 120 | 130 | 140 | 150 | 160 | 170 |
180 | 190 | 200 |
2) : Stock thickness for hot rolled plate
6 | 8 | 10 | 12 | 14 | 16 | 18 | 20 | 25 | 30 |
35 | 40 | 45 | 50 | 55 | 60 | 65 | 70 | 75 | 80 |
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 1.2842 ingot into the furnace and pre-heat to 650-750℃
Continue heating the ingot to initial temperature: 1050-1100℃
Forge the ingot, forging temperature should be not less than 800-850℃
Cooling in the furnace or in the ash after forging
7: Heat treatment
1): Annealed:
Heat 1.2842 steel to 780-820℃ in the furnace
Soak at this temperature in the furnace
Cooling in the furnace slowly
2): Quenching and tempering:
Preheat Temperature: 649℃
Heat 1.2842 steel to 780-800℃ in the salt bath furnace
Soak at this temperature in the furnace
Quench in oil
Temper steel at 170-190℃ 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
1.2842 is a high carbon low alloy cold work tool steel, with excellent wear resistance, good toughness and heat treatment stability, it is widely used in the following fields:
1. Cold Work Tooling
1) Stamping Tooling: stamping low carbon steel, copper alloy, aluminum plate and other thin plates (thickness <3mm), electronic shell, hardware punching mold.
2) Forming Dies: bending, deep drawing dies.
3) Shearing Tools: for paper, plastic, thin metal plate precision shear.
2. Cutting and Measuring Tools: wear-resistant measuring tools such as card gauges and plug gauges, taps, drills , woodworking tools.
3. Wear-resistant Mechanical Parts: guide bushings, bearing cages, textile machinery parts (such as wear-resistant guide needles).
