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D2 Tool Steel

We can produce D2 Tool Steel stainless steel round rods, D2 Tool Steel forging,sheet,coil,and profiledstrip,Deformed steel,flat steel,mould,steel wire,have all specifications. With DuoNian production experience, strict control D2 Tool Steel chemical composition and D2 Tool Steel mechanical properties.From casting, forging, steel to hot and cold rolling process, heat treatment, etc, we have the control of professional engineers. We have advanced precision machining equipment, according to the requirements of users machining. in order to achieve the most satisfied with the user requirements.

Production specification

Round bar steel: 1mm to 3500mm
Square-shape steel: 1mm to 4000mm
Plate steel:0.1mm to 4000mm
Width: 10mm to 2500mm
Lenth: We can supply any lenth based on the customer's requirement.
Forging: Shafts with flanks/pipes/tubes/slugs/donuts/cubes/other shapes
Tubings: OD: φ6-1800mm, with wall thickness ranging from 1-35 mm.
Finished goods condition: hot forging/hot rolling + annealing/normalizing + tempering/quenching + tempering/any conditions based on the customer's requirement
Surface conditions: scaled (hot working finish)/ground/rough machining/fine machining/based on the customer's requirement
Furnaces for metallurgical processing: electrode arc + LF/VD/VOD/ESR/Vacuum consumable electrode.
Ultrasonic inspection: 100% ultrasonic inspection for any inperfections or based on the customer's requirementExcellent service for all kinds of industries,with advantages of technologies, equipment and price.
We serve you with our honesty, integrity, and professionality.

D2 Tool Steel

BS4659 BD2 is a high carbon, high chromium, molybdenum, vanadium, air hardening alloy steel/" target="_blank" class="keylink">tool steel which offers good wear resistance, high surface hardness, through hardening properties, dimensional stability and high resistance to tempering effect. D2 steel/" target="_blank" class="keylink">tool steel is also suitable for vacuum hardening.

Typical Analysis
C.	Si.	Cr.	Mo.	V.
1.50%	0.30%	12.00%	0.80%	0.90%

Forging:
Heat slowly and uniformly to 700°C then more rapidly to 900/1040°C. After forging cool slowly.

Annealing:
Anneal at 850°C and slow furnace cool. Hardness after annealing will be approx. 225 brinell.

Hardening:
Pre heat slowly to 750/780°C and thoroughly soak. Continue heating to the final hardening temperature of 1000/1030°C and allow the component to be heated through. Quench in oil or cool in air.

Tempering:
Heat uniformly and thoroughly at the selected tempering temperature and hold for at least one hour per inch of total thickness. Double tempering should be carried out with intermediate cooling to room temperature.

Tempering °C	150	200	250	300	350	400
HRc	62/61	61/60	60/59	57/56	56/55	56/55

Stress Relieving:
If machining operations have been heavy or if the tool has an unbalanced section, remove stresses before hardening by heating up to 700°C, equalise, then cool slowly.

Hard Chromium Plating:
After hard chromium plating tempering of D2 steel/" target="_blank" class="keylink">tool steel is recommended at 180°C for 4 hours to avoid hydrogen embrittlement. Tempering is to be performed immediately after chromium plating.

Welding:
Due to the high risk of crack formation welding of D2 steel/" target="_blank" class="keylink">tool steel should be avoided, if possible. When, howe ver welding is essential, the following serves as a guide:

A.   Welding of soft annealed D2 steel/" target="_blank" class="keylink">tool steel.
·       Preheat to 300 - 500°C
·       Weld at 300-500°C
·       Immediately stress relieve
Electrode: Cr-Mo alloy electrode for welding structural steel.

B.    Welding in connection with hardening of soft annealed D2 steel/" target="_blank" class="keylink">tool steel.
·       Heat to austenitizing temperature.
·       Cool to approx. 500°C
·       Weld at approx. 500°C
·       Cool to approx. 100°C in the same way as at normal hardening, then temper to desired hardness. Double tempering will
     reduce the risk of crack formation.
Electrode: Hard facing electrode.

C.    Repair welding of D2 steel/" target="_blank" class="keylink">tool steel in hardened and tempered condition.
·       Preheat to the tempering temperature (min. 200°C) previously used.
·       Weld at tempering temperature
·     Heat immediately to tempering temperature, but max. 300°C. Soaking time 2 hours.
Electrode: Hard facing electrode.

Physical Properties:	Temperature:
	20°C	200°C	400°C
Density (kg/dm³)	7.70	7.65	7.60
Coefficient of thermal expansion (per °C from 0°C)	-	11.0 x 10-6	10.8 x 10-6
Thermal conductivity (cal/cm.s °C)	40.9 x 10-3	50.4 x 10-3	55.2 x 10-3
Specific heat (cal/g °C)	0.110
Modulus of elasticity:
Kp/mm²	19 700	19 200	17 650
N/mm²	193 000	188 000	173 000

Mechanical properties

D2 Tool Steel Mechanical properties,Our production completely according to the D2 Tool Steel standards to meet the D2 Tool Steel mechanical performance, can also according to the customer request, to meet the requirements of customers of D2 Tool Steel mechanical properties.

Heat treatment

D2 Tool Steel Heat treatment,Our production completely according to the D2 Tool Steel standards to meet the D2 Tool Steel Heat treatment, can also according to the customer request, to meet the requirements of customers of D2 Tool Steel Heat treatment.

Machining

D2 Tool Steel Machining,Our production completely according to the D2 Tool Steel standards to meet the D2 Tool Steel Machining, can also according to the customer request, to meet the requirements of customers of D2 Tool Steel Machining.

Welding performance

D2 Tool Steel Welding performance,Our production completely according to the D2 Tool Steel standards to meet the D2 Tool Steel Welding performance, can also according to the customer request, to meet the requirements of customers of D2 Tool Steel Welding performance.

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