H13 tool steel

H13 Steel is  slowly preheated  to 750°C and  then  the temperature is increased  rapidly to 1050-1100 °C. Forging shouldnot be done  below 850°C.  Then slowly cool it in either furnace or in vermiculite.

Soaking to be done  thoroughly at 840-860°C before furnace cooling at a  rate of 20°C /hour  at  600°C  and then cooled  in air.

In order to minimise distortion or cracking during the heat treatment,stress relieving is advised ,specially when  heavy machining is to be carried out. This procedure must be done  after rough machining. H13 component to be heated  carefully to 700°C, with  good soaking time (2 hours/ 25mm of section) and then  cooled  in the furnace or in the air. Before the  hardening process,tool component must  be finish machined.

H13 tool component is preheated  to 780-820°C. After  thorough soaking, the temperature is  increased  rapidly to  1000-1030°C. When the H13 has attained this temperature,Again  soaking  for approximately 30 minutes is done at this raised temperature and then cooled  in air.  Quenching is done in oil. Isothermal molten salt bath treatment is recommended in order to reduce decarburization or scaling.Salt is  preheated   at 780-820°C and  then transfer to a  salt bath with 1000-1030°C. Soaking  and quenching is done into salt standing at 500-550°C. Let it  equalise,then  withdrawn  and cooled  in air. H13  tool steel can  be vacuum hardened / pack hardened. Tempering to be done after the tool steel has become hand warm.

 Uniform heating to be done  to the required temperature with  soaking time of                 2 hours / 25mm of  section. Let it cool in air. Second tempering is recommended. H13 tool is allowed to cool at room temperature between the tempers. The  tempering range is 530-650°C which  depends on the hardness requirements and also on  the operating temperature of H13 tool.

Ammoniac gas nitriding- temperature  525°C – surface hardness  1000 to 1250HV approx.

Before nitriding ,H13 tool needs to be hardened and tempered at  50°C(approx.), above the nitriding temperature.

NOTE:  Increase in nitriding  penetration results in  reduction of  resistance to thermal shock and  embrittlement increase.

P20 tool steel can have a 55-59HRC surface hardness.

In order to avoid retooling cost, users go for welding of the too,which is actually not required.  H13  is an air hardening steel and  in welding ,the area that is  weld attains temperature of  1000°C. Cracking can occur during cooling if precautions are not taken. Methods of welding INCLUDEIn order to avoid retooling cost, users go for welding of the too,which is actually not required.  H13  is an air hardening steel and  in welding ,the area that is  weld attains temperature of  1000°C. Cracking can occur during cooling if precautions are not taken. Methods of welding INCLUDEatomic hydrogen argon arc

Welding Procedure

1) Annealing  the H13  tool prior to welding ,with care welding to be done on hardened tools  and tempered tools.After annealing , stress relieving  at 700°C to e done  before re-hardening.If H13 is not  annealed prior to welding, then re-tempering  at 550-600°C to be done  for minimum 2 hours.

2)  Die to be preheated at  300-500°C and  maintain the same  temperature during welding.3) Cool the die slowly in the  furnace or in an  insulating material..

This procedure will vary according to the shape and size of H13 tool component. Rate of heating, rate of cooling , soaking time also will differ for due to shape and size of H13. Other factors like type of furnace,medium  for quenching etc also matter.

With our material,we provide mill test certificate and ultrasonic Ok certificate (Note: Provide only if mentioned before placing the order.)