W. NR. 1.2738 HH

Characteristics

Chrome-manganese-nickel-molybdenum steel for hardening in air or in oil with good hardenability and good firmness during the heat. It is well-workable during the heat and well-workable in the soft-annealed state and has good polishability. The steel has a good ability of the heat-treatment into big depths (better than W.Nr.1.2312), with the balanced process of firmness around the whole cross-section. It is appropriate for nitriding and hard-chroming.

Suitability

Převážně zušlechtěná na pevnost od 1050 až 1250 N/mm2 se používá na velké formy pro vstřikování plastů a velké rámy forem.

Chemical composition of steel W.Nr. 1.2738

Steel gradeChemical composition in %Hardness in state
soft-annealedheat-treated
CMnSiCrWMoVNi maxCoP max.S max.HB max.HRC min.
DIN 54NiCrMoV60,35-0,451,30-1,600,20-0,401,80-2,10 0,15-0,25 0.90-1,20 0,0350,03523551
ČSN is not             

Heat treatment of steel W.Nr. 1.2738

WayTemperature [°C]Procedure
Forging850-1050Cool slowly in dry ash or other thermally-insulated material
Soft annealing710-740Warm few hours (according to the size of object), mostly four hours are enough and cool slowly in the furnace
Annealing to lower tension600-650Warm 1 to 2 hours and cool slowly in the furnace
Hardening in air or in oil840-870Cool in oil or in air at 180-220 °C
Tempering500-600Cool in air, the degree of tempering is set by hardness and toughness of instrument according to the tempering chart

Note

Chart of tempering values depending on the hardness:

°C100200300400500600700
HRC51504846423528
N/mm2173016701570148013301230920

Graph

Product range

Blocks: 1030x1460, 1140x1280, 910x1500
We will deliver any semi-finished products from the above mentioned dimensions. Other dimensions, except for given stock supplies, have to be consulted with us.

Tool steel meets the requirements of various kinds of tools, e.g. for machining, hot- and cold-working, measuring instruments and die-casting moulds. We also offer high-speed steel.

Tool steel meets the requirements of various kinds of tools, e.g. for machining, hot- and cold-working, measuring instruments and die-casting moulds. These tool materials conform to great quality demands of steel, like temper, strength, toughness, resistance to tempering, hardening capacity, dimensional stability, etc. The range of tool steel in our store includes products from renowned manufacturers. We also supply high - speed steel.

Special tool steel is suitable for the manufacture of moulds, dies and pressing tools. This steel has better end-use properties than common classic steel, therefore it can help saving considerable amounts of money in manufacture.

This patented Swedish steel is distinguished by its high range of use. It is suitable for the manufacture of tools and moulds as well as machinery parts. This material can replace many kinds of classic tool and structural steel.

We supply these grades of steel: St52.3, C45, 16MnCr5, 42CrMo4