1.Supply Form & Size & Tolerance
| Supply Form||Size(mm)||Process||Tolerance |
|Φ6-Φ100||Cold Drawn||Bright/Black|| Best H11 |
|Peeled/ground|| Best H11 |
|Rough Turned||-0/+3mm |
|Thickness :120-800 |
|Rough Machined||-0/+3mm |
Remark:Tolerance can be customized as per requests
|ASTM A681||H13||0.32-0.45||0.8-1.2||0.20-0.50||0.03||0.03||4.75-5.50||1.1-1.75||0.8-1.2 |
|DIN ISO 4957||1.2344||0.37-0.42||0.9-1.2||0.3-0.5||0.03||0.03||4.8-5.5||1.2-1.5||0.9-1.1 |
|GB/T 1299||4Cr5MoSiV1||0.32-0.42||0.8-1.2||0.2-0.5||0.03||0.03||4.75-5.5||1.1-1.75||0.8-1.2 |
|JIS G4404||SKD61||0.35-0.42||0.8-1.2||0.25-0.5||0.03||0.03||4.8-5.5||1-1.5||0.8-1.15 |
|Modulus of elasticity，N/mm2||210000||180000||140000 |
|Coefficient of thermal expansion，per °C from 20°C||—||12.6 x 10^–6||13.2 x 10^–6 |
|Thermal conductivity，W/m °C||25||29||30 |
|Melting point||1427°C |
|Specific Gravity||7.75 |
|Machinability||65-70% of a 1% carbon steel |
4. Mechanical Property
|Tempering Tem. ℃||After quenched||200||400||500||520||550||580||600||650||700 |
|Hardness HRC||56||54||54||55.5||54||52.5||49||45.5||33||28 |
|Tensile Strength Mpa||—||—||2040||2100||2080||1980||1780||1650||1180||— |
|Reduction of area||—||—||40||34||40||48||53||54||55||— |
|Elongation %||—||—||11||11||11.5||12||12.5||14||18||— |
|Impact J||—||—||40||32||35||50||60||70||100||— |
Heat AISI H13 with two steps,first heat the temperature to 750 oC – 800 oC ,hold for suitable time,then heat the temperature up to 1050 oC – 1100 oC,hold enough time for the steel to be thoroughly heated.Reheat is necessary when temperature below 950oC.H13 steel should be cooled as slowly as possible in the furnace.Annealing is always required after forged.
Annealing is considered as a treatment suitable for machining.Heat the temperature to 840℃-860℃,hold suitable time for the steel to be thoroughly heated, then furnace cooling.Annealed black surface, hardness≤255HB.
It is recommended to stress relieve after machining and prior to hardening to minimise the possibility of distortion.H13 should be heated through to 600-650°C, holding time 2 hours. Cool slowly in furnace.
Pre-heating temperature: 600–850°C,normally in two pre-heating steps.
Austenitizing temperature: 1020–1050°C,normally 1020–1030°C
|Temperature,°C||Soaking Time,Minutes||Hardness before tempering |
|1025||30||53±2 HRC |
|1050||15||54±2 HRC |
Soaking time = time at hardening temperature after the tool is fully heated through.
Tempering should be carried out immediately after quenching. Heat slowly and uniformly to the tempering temperature,soak well not less than 2 hours(one hour per 25mm of total thickness).The usual tempering range is 530-650°C depending on the hardness requirements and the operating temperature of the tool.Double tempering is strongly recommended,H13 H13 should be cooled to room temperature between tempers.Tempering within the range 425-550°C is not recommended due to the reduction in toughness properties.
|Temperature ,°C||400||500||550||600||650 |
H13 hot work tool steel has excellent properties which is widely used in hot work and cold work applications.
Typical applications include die casting dies for aluminium, magnesium and zinc, extrusion dies for aluminium and brass, liners, mandrels, pressure pads, followers, bolsters, die cases, die holders and adaptor rings for copper and brass extrusion. H13 is used to produce hot stamping and press forge dies, split hot heading dies, gripper dies, hot punching, piercing and trimming tools. Other applications include plastic moulds, shear blades for hot work and hot swaging dies.