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Cold Work Tool Steel Bar / Rod AISI A2 / DIN EN X100CrMoV5 1.2363 High Strength

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Cold Work Tool Steel Bar / Rod AISI A2 / DIN EN X100CrMoV5 1.2363 High Strength

Brand Name : UST
Model Number : ASTM A2
Certification : ISO 9001:2008
Place of Origin : MAINLAND CHINA
MOQ : 3 Metric tons
Payment Terms : L/C, T/T, D/A, D/P
Supply Ability : 1000 Metric Tons per Month
Delivery Time : 15-35 days
Packaging Details : In standard export packing and seaworthy material with rectangular shape bundle, covered with tarpaulin, in ontainers or in bulk, or upon request
Matrial : Tool Steel
Standard : GB, ASTM, DIN,JIS
Grade : A2 / 1.2363
Diameter : 20-1000mm
Length : Below 16 meters
Shape : Round bar
Techniques : Cold drawn; Hot rolled; Cold rolled; Forged
Surface : Black, Bright, Polished, Peeled, or upon request
Processing : Annealed or Quenched and tempered provided
End : Beveled, plain end as required
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AISI A2 / DIN EN X100CrMoV5 1.2363 Cold-Work Tool Steel Bar / Rod


AISI A2 tool steel is one of ‘A’ group cold works steel in ASTM A681 standard. A2 Tool Steel is a versatile, air hardening chromium alloy tool steel that replaces O1 tool steel when safer hardening, less distortion and increased wear resistance are required. AISI type A2 steel is intermediate in wear resistance between O1 oil-hardening tool steel and D2 high-carbon, high-chromium tool steel.

Characteristics of A2 tool steel include:

  • Good machinability,
  • High compressive strength,
  • High dimensional stability after hardening and tempering.
  • Good hardenability, very good non-deforming properties, deep hardening,
  • Good wear resistance


AISI A2 tool steel takes a place between AISI O1 and AISI D2, offering an excellent combination of good wear resistance and toughness. It may be regarded, therefore, as a“universal” cold work steel.

Typical Applications for AISI/ASTM A2 steels materials: Blanking dies, block and ring gauges, coining, cold forming, cold trimming and forming dies, cold shears, rolls, knurls and knurling tools, machine parts, mandrels, punches and punch plates, reamers, shear and slitter blades, stamping dies and threading tapes.

Steel Grade1.2363ApplicationTool steel, Mold Steel
ShapeRound BarStandardGB, ASTM, DIN,JIS
DimensionΦ20-1000 mm; length below 16mSurfaceBlack, Bright, Polished, Peeled
TechniqueCold drawn; Hot rolled; ForgedUltrasonic Test100% UT Passed


Diameter (mm)
Cold drawn10-100
Hot Rolled20-280
Hot Forged130-1000


- HOT rolled; Cold rolled; Forged; Cold Drawn

- Heat Treatment: Untreated, Annealing, N+T, Q+T

- Smelting: EAF+LF+VD (+ESR)

- Surface Finish: Black, Rough Machined, Peeled, Turned or as per given requirements

- UT 100% passed

- Cutting service provided

- Third Party inspection is acceptable (SGS, BV etc.)



















Mechanical Properties

Hardness, Rockwell C (as air-hardened (63-65 HRC average), 60-62 HRC at 205°C, 59-61 HRC at 260°C, 58-60 HRC at 315°C, 57-59 HRC at 370°C and 425°C and 480°C, 56-58 HRC at 540°C, 50-52 HRC at 595°C, 42-44 HRC at 650°C)6464
Bulk modulus (typical for steels)140 GPa20300 ksi
Machinability (based on carbon tool steel)65%65%
Shear modulus78.0 GPa11300 ksi
Poisson’s ratio0.27-0.300.27-0.30
Elastic modulus190-210 GPa27557-30457 ksi


Forging of AISI A2 Tool Steel

Heating A2 steel for forging must be done slowly and uniformly. Heat the steel A2 slowly to 700°C then more rapidly to 1050-1100°C. Avoid working below 899°C(1650°F). After forging cool very slowly in lime, mica, dry ashes or furnace. AISI A2 steel should always be annealed after forging.

AISI A2 Tool Steel Heat Treatment

  • Stress relieving

Heat slowly to 670-700°C, soak for a minimum of two hours per 25mm of section then cool down in the furnace.

  • Annealing

To prevent decarburization use a controlled atmosphere furnace or pack in a sealed container using some inert material. To anneal A2 tool steel for lowest hardness, heat slowly to 899°C(1650°F) and hold at this temperature for about two hours per inch of greatest cross-section. Cool steel A2 at a rate of 20°F (10°C) per hour to 650°C (1200°F) and reheat to 732°C (1350°F); hold 3 hours per inch of greatest cross-section; furnace cool at 20 degrees per hour to 593°C (1100°F); then furnace-cool to 482°C (900°F) and air-cool.

  • Hardening

Preheating temperature: 1200–1380°F (650–750°C). Austenitizing temperature: 1700 –1780°F (925–970°C) but usually 1720–1760°F (940–960°C).

  • Tempering

Heat uniformly and thoroughly to the desired temperature and hold for 25 minutes per cm of thickness. Tool steel A2 can be double tempering, after intermediate cooling to room temperature. Temper at 200°C for a balance of hardness and strength or 350°C where strength is more important than hardness. A minimum holding time of 2 hours per inch of greatest cross-section should be used.

  • Quenching

Martempering bath or fluidized bed at 360–430°F (180–220°C) or 840–1020°F (450–550°C) then cool in air/ Circulating air or atmosphere/ Vacuum furnace with overpressure of gas at cooling/ Oil (only for small and uncomplicated tools)

  • Nitriding

Nitriding will give a hard diffused surface layer which is very resistant to wear and erosion, and also increases corrosion resistance. Nitriding AISI A2 steels in ammonia gas at a temperature of 975°F (525°C) gives a A2 steel surface hardness of approx. 1000 HV1. 2 hours nitrocarburizing treatment at 1060°F (570°C) gives a surface hardness of approx. 900 HV1. The case depth having this hardness will be 0.0004–0.0008″ (10–20 µm).


A. Welding in order to harden the soft annealed tool steel A2

  • Heat to austenitizing temperature
  • Cool to approx. 500°C (932°F)
  • Weld at approx. 500°C (932°F)
  • Cool to approx. 100°C (212°F)
  • Hard facing electrode

B. Repair welding of A2 tool steels in hardened and tempered condition

  • Preheat to the tempering temperature (min. 200°C) (392°F)
  • Weld at tempering temperature
  • Heat immediately to tempering temperature, but max. 300°C (572°F). Soak the steels for 3 hours
  • Cool in air to approx. 80°C (176°F)
  • Heat to tempering temperature. Soak for 2 hours
  • Hard facing electrode

C. Welding of soft annealed tool steel A2

  • Preheat to 300-500°C (572-932°F)
  • Weld at 300-500°C (572-932°F)
  • Stress relieve immediately.
  • Cr-Mo alloy electrode for welding structural steel

What we can offer?

-We offer a wide range of steel products in a wide variety of dimensions and executions, according to the common international specifications or customize.

-Machining and heat treatment are available.

-Also, we advise you in choosing the right materials.

Shape Available

  • Solid round bar
  • Flat bar
  • Square bar
  • Hexagon bar
  • Block
  • Plate
  • Sheet
  • Wire rod
  • Strip

Our Advantages

  • High mechanical property and quenching, enable the surface share equal hardness after deal with it
  • Good polishing and low roughness
  • Making the heat-treatment to harden condition before using it
  • Competitive price
  • Fast production lead-time
  • All the material are inspected with 3 times to meet the highly standards
  • Pure steel quality & stable quality to be guarantee



Available Size:
-Round: Dia. 20-1000 mm
-Flat: T. 10-120 mm x W. 60-810 mm
-Block: T. 80-1200 mm x W. 100-1600 mm


1. Both T/T and L/C will be acceptable

2. Trade Terms: FOB, CIF, CFR

3. The delivery will be in 10-15 days if have stock; For customized items, the delivery will be negotiated by both parties

4. Shipping by sea freight from Shanghai Port (PRC) for Bulk orders, by airfreight or express for samples


Shanghai Unite Steel Trading Co., Ltd

We are committed to integrate engineering steel resources in china and serve the global engineering steel market. Our company has more than 15 years of experience in steel researching, production, managing and sales. And our team mostly are based on and worked in national famous steel enterprise.

In the aspect of resources and information, we have established cooperative and stronger relationship with nearly hundred enterprises, either state-owned or private owned in china.

What’s more, we have built long, deep and close business relationship with dozens of steel company, Sharing and holding equities with several steel enterprises. Because of the close cooperation with steel companies and our pioneering spirit, which can ensure us stay at the top competition, and ensure our customers get what they really want!


Q: Are you a manufacturer or merely a trader?
A: We are group of companies and owned manufacturer bases and trading company. We specialized in special steel which include alloy structural steel and carbon steel and stainless steel, etc. All material are with high quality and competitive price.

Q: How do you guarantee the quality of your product?
A: Firstly, we can provide the certificates from the third party, such as TUV, CE, if you need. Secondly, we have a complete set of inspection system and every process is checked by QC. Quality is the lifeline of enterprise survival.

Q: Delivery time?
A: We have ready stock for most of material grades in our warehouse. If the material doesn't have stock, the delivery lead time is about 5-30 days after receiving your prepayment or firm order.

Q: What is the payment term?
A: T/T or L/C.

Q: Can we visit your company and factory?
A: Yes, warmly welcome! We can book the hotel for you before you come to China and arrange our driver to our airport to pick you up when you come.


We are happy to answer your questions and make you an offer for these and other materials. Contact us now for more information.

Product Tags:

tool steel rod


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