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A2 Tool Steel

We can produce A2 Tool Steel stainless steel round rods, A2 Tool Steel forging,sheet,coil,and profiledstrip,Deformed steel,flat steel,mould,steel wire,have all specifications. With DuoNian production experience, strict control A2 Tool Steel chemical composition and A2 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.

A2 Tool Steel

BS4659 BA2 is a cold work, air hardening steel/" target="_blank" class="keylink">tool steel, which offers high surface hardness in hardening, good wear resistance, great through hardenability. A2 steel/" target="_blank" class="keylink">tool steel is also characterised by its high dimensional stability after hardening and tempering, high compression resistance and good resistance to tempering.

Typical Analysis
C.	Mn.	Cr.	W.	V.
0.95%	1.25%	0.50%	0.50%	0.20%

Forging:
Heat slowly and uniformly to 700°C. Forge within a range of 1050/1100°C, reheating if necessary. Cool ver y slowly (preferably in a furnace) to avoid setting up stresses.

Annealing:
Heat uniformly to 850°C, equalise, then furnace cool. (Hardness about 215 Brinell). Fully machined tools should be packed during annealing.

Stress Relieving:
If machining operations have been heavy or if the tool has an unbalanced section, remove stresses before hardening by heating up to 675°C, equalise, then cool in furnace to 500°C before slowly cooling in air.

Hardening:
Pre heat to 600/700°C and thoroughly soak. Continue heating to the final hardening temperature of 950/980°C. Allow sufficient time for the component to be heated through. Quench in oil or cool in air.

Martempering:
Martempering is an alternative hardening procedure which may be used when suitable salt bath equipment is available.

Tempering:
Heat uniformly and thoroughly at the selected tempering temperatures and hold for at least one hour per inch of total thickness.

Tempering °C	150	200	250	300	350	400
HRc	62/61	61/60	60/59	659/580	58/57	58/57

Hard Chromium Plating:
After hard chromium plating tempering of A2 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 A2 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 A2 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 A2 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.
Electrode: Hard facing electrode.

C. Repair welding of A2 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 3 hours.
·       Cool in air to approx. 80°C.
·       Heat to tempering temperature. Soaking time 2 hours.
Electrode: Hard facing electrode.

Physical Properties:	Temperature:
	20°C	200°C	400°C
Density (Kg/dm³)	7.75	7.70	7.65
Coefficient of thermal expansion (per °C from 0°C)	-	11.6 x 10-6	11.3 x 10-6
Thermal conductivity (cal/cm.s °C)	62.4 x 10-3	64.8 x 10-3	68.4 x 10-3
Specific heat (cal/g °C)	0.110
Modulus of elasticity:
Kp/mm²	19 370	18 900	17 325
N/mm²	189 900	185 200	169 800

Mechanical properties

A2 Tool Steel Mechanical properties,Our production completely according to the A2 Tool Steel standards to meet the A2 Tool Steel mechanical performance, can also according to the customer request, to meet the requirements of customers of A2 Tool Steel mechanical properties.

Heat treatment

A2 Tool Steel Heat treatment,Our production completely according to the A2 Tool Steel standards to meet the A2 Tool Steel Heat treatment, can also according to the customer request, to meet the requirements of customers of A2 Tool Steel Heat treatment.

Machining

A2 Tool Steel Machining,Our production completely according to the A2 Tool Steel standards to meet the A2 Tool Steel Machining, can also according to the customer request, to meet the requirements of customers of A2 Tool Steel Machining.

Welding performance

A2 Tool Steel Welding performance,Our production completely according to the A2 Tool Steel standards to meet the A2 Tool Steel Welding performance, can also according to the customer request, to meet the requirements of customers of A2 Tool Steel Welding performance.

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