H10 Tool Steel - 1.2365 - 32CrMoV12-28 - JIS ~SKD 7

H10 is a hot work, chrome-molybdenum steel with good thermal conductivity and impact strength that can be water cooled and is not susceptible to hot cracking.

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H10 Tool Steel Standard values

Working hardness: 50 HRC - 52 HRC
Delivery condition: max. 229HB

Chemical composition in %

0.280000

0.28

–

0.350000

0.35

0.100000

0.1

–

0.400000

0.4

0.150000

0.15

–

0.450000

0.45

0.000000

–

0.030000

0.03

0.000000

–

0.020000

0.02

2.700000

2.7

–

3.200000

3.2

2.500000

2.5

–

3.000000

0.400000

0.4

–

0.700000

0.7

H10 Tool Steel Technical Properties

Hot work steel with high toughness, heat resistance and tempering resistance. Air-hardening steel grade with good thermal conductivity. Can be water cooled.

H10 Tool Steel Applications

extrusion presses, brass casting, press tools, die inserts, die casting molds, plastic molds, recipient bushes, pressure dies, press mandrels, tube extrusion mandrels, piecer plugs, press dies, block receivers, screw production, nut production, rivet production, bolts production, hot shear knives

Standard values

Chemical designation: Working hardness: 50 HRC - 52 HRC
Delivery condition: max. 229HB

Chemical composition:

0.280000

0.28

–

0.350000

0.35

0.100000

0.1

–

0.400000

0.4

0.150000

0.15

–

0.450000

0.45

0.000000

–

0.030000

0.03

0.000000

–

0.020000

0.02

2.700000

2.7

–

3.200000

3.2

2.500000

2.5

–

3.000000

0.400000

0.4

–

0.700000

0.7

Technical properties

Hot work steel with high toughness, heat resistance and tempering resistance. Air-hardening steel grade with good thermal conductivity. Can be water cooled.

Applications

H10 General Information

Heat the material uniformly to a temperature The thermal conductivity, which makes this steel grade unresponsive to temperature changes and the ability to be water cooled, makes H10 an excellent choice for high-speed forging dies or for tools which are exposed to high thermal strains. H10 offers high toughness and can be used very well for cold forming. The former mentioned characteristics make this tool steel the best choice for applications like hot punches, extrusion tools, die inserts as well as hot shear blades, ejector pins, tool holders, tools for extrusion for processing copper alloys like inner sleeves or the processing of light metals for bridge dies and piercing mandrels.

Heat treatment

Annealing

Heat the parts uniformly to a temperature of 1382-1472°F (750-800°C), then cool them slowly in the furnace by 50-68°F (10-20°C) per hour to a temperature of 1112°F (600°C), complete this process with cooling the parts further in air. Precaution should be taken to avoid excessive decarburization/carburization.

Stress relieving

H10 should be heated uniformly to a temperature of 1112-1202°F (600-650°C) after rough machining. Hold for 1-2 hours in a neutral atmosphere, then cool slowly in the furnace.

Hardening

of 1832-1886°F (1000-1030°C) and hold for 15 to 30 minutes. Quench for maximum hardness in oil, for most applications this material can be quenched in air. To minimize decarburization quench in salt or a controlled atmosphere furnace.

Quenching media

To avoid excessive distortion and/or quench cracking, cooling should be done uniformly and a sufficient cooling rate needs to be considered.

Air
Oil
Controlled atmosphere furnace
Salt bath, at a temperature of 932-1022°F (500-550°C), hold the temperature for 15-30 minutes after equalizing.

Tempering

Temper the material immediately after hardening for at least 2 hours for smaller pieces and 1 hour per ²⁵/₃₂inch (20mm) of thickness for larger pieces, at a temperature of 842-1058°F (450-570°C). To achieve a better toughness, it is recommended to temper this material twice; a third tempering cycle can be advantageous to relieve stress. The third tempering cycle should be done at a temperature of 86-122°F (30-50°C) below the highest tempering temperature.

For our tempering diagram, please click here.

Machinability

Forging

The material should be heated slowly and uniformly to a temperature range of 1900-2000°F (1038-1093°C). Reheat as often as necessary and do not let the temperature drop below 1650°F (899°C). To finish the process off cool slowly in lime, dry ash or in the furnace and always anneal after forging.

Disclaimer

The data shown here has been compiled with the greatest diligence and is regularly updated with regard to the correctness and completeness of its content. The content is indicative only and should not be taken as a warranty of specific properties of the product described or a warranty of suitability for a particular purpose. All information presented is given in good faith and no liability will be accepted for actions taken by third parties in reliance on this information. ABRAMS Industries reserves the right to change or amend the information given here in full or parts without prior notice.