Hot Work Tool Steel Plate/Bar Astms30300 High Speed Tool Steel
JIS A681 H21 Hot Work Tool Round Bar Die Steel Mold Steel
Industry leading 1.2343/H11/SKD61/AISI H11 Hot Work Tool Steel/Flat Bar/Steel Block/Round Bar steel
1.2714 (56NiCrMoV7) belongs to the German standard hot work die steel, the implementation standard: DIN 17350-1980
1.2714 (56NiCrMoV7) steel has a high Cr content and high hardenability. The martensite structure can be obtained by air cooling during quenching. After quenching and tempering, 1.2714 steel has good comprehensive properties, uniform density, high wear resistance and thermal fatigue resistance, and small deformation.
1.International Standard
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DIN 1.2344 Hot Work Tool Steel (also known as AISI H13) is a tool steel grade standardised for hot working. The main feature of this grade is the combination of alloyed elements of Cr, Mo and V, which provides a high wear resistance to thermal shock. It is well known as for its great strength, and heat resistance. It is heavily used for die casting in the cold heading field. The presence of high vanadium in DIN 1.2344 can handle the abrasion at both low and high temperatures. It always provides a uniform and high level of machinability. This tool steel is mostly used for aluminum, magnesium and zinc die casting.
Dimensions
Round: dia.10-700 mm
Flat: 6-120 x 40-1200 mm
Block: 80-600 x 100-1600 mm
Specifications
EAF+LF+VD+(ESR), Hot rolled or Forged, Annealed, Black surface or Machined surface, UT SEP1921 Class3 D/d
Equivalence
| AISI / SAE |
DIN / W.Nr |
JIS |
GB |
| H13 |
1.2344 |
SKD61 |
4Cr5MoSiV1 |
Chemical Composition(%)
| Steel Grade |
C |
Si |
Mn |
P |
S |
Cr |
Mo |
V |
| 1.2344 |
0.35-0.42 |
0.80-1.20 |
0.25-0.50 |
≤ 0.030 |
≤ 0.020 |
4.80-5.50 |
1.20-1.50 |
0.85-1.15 |
| H13 |
0.32-0.45 |
0.80-1.20 |
0.20-0.50 |
≤ 0.030 |
≤ 0.030 |
4.75-5.50 |
1.10-1.75 |
0.80-1.20 |
| SKD61 |
0.32-0.42 |
0.80-1.20 |
0.25-0.50 |
≤ 0.030 |
≤ 0.030 |
4.50-5.50 |
1.00-1.50 |
0.80-1.15 |
Characteristics
1. Air cooling hardened hot work tool steel, most widely used.
2. High toughness Good cold & thermal fatigue resistance.
3. Small distortion, deformation and oxide skin after heat treatment during air cooling.
4. Good resistance from the undermining of fusing Aluminum.
Applications
1. For making aluminum and copper alloy die casting mold when die cavity temperature is below 600°C
2. For making forging die, forging press mold, mold hammer block for fine forging machine uses.
Forging Technique
| Heat Temperature |
Start Forging Temperature |
Finish Forging Temperature |
Cooling Method |
| 1120-1150 °C |
1050-1100 °C |
900-850 °C |
Pit or Sand Cooling |
Heat Treatment
Annealing
750 to 800°C (1382 to 1472°F)
Slow controlled cooling in furnace at a rate of 10 to 20°C/hr (50 to 68°F/hr) down to
approx. 600°C (1112°F), further cooling in air.
Hardness after annealing: max. 235 HB.
Hardening
1020 to 1080°C (1868 to 1976°F)
Oil, salt bath (500 - 550°C / 932-1022°F), air
Holding time after temperature equalization: 15 to 30 minutes.
Obtainable hardness:
52 - 56 HRC in oil or salt bath,
50 - 54 HRC in air.
Stress relieving
600 to 650°C (1112 to 1202°F)
Slow cooling in furnace; intended to relieve stresses set up by extensive machining, or in complex shapes.
After through heating, hold in neutral atmosphere for 1 - 2 hours.
Tempering
Slow heating to tempering temperature immediately after hardening / time in furnace
1 hour for each 20 mm of work piece thickness, but at least 2 hours / cooling in air.
It is recommended to temper at least twice.
A third tempering cycle for the purpose of stress relieving may be advantageous.
1st tempering approx. 30°C (86°F) above maximum secondary hardness.
2nd tempering to desired working hardness.
The tempering chart shows average tempered hardness values.
3rd for stress relieving at a temperature 30 - 50°C (86 to 122°F) be low highest
tempering temperature.
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2.Chermical Compisition(Wt%):
| 1.2714 |
C |
Si |
Mn |
Cr |
Mo |
S |
P |
V |
| 1.40-1.60 |
0.40-0.60 |
0.40-0.60 |
11.0-13.0 |
0.80-1.20 |
≤0.003 |
≤0.003 |
0.20-0.5 |
3.Available Size(mm):
| Flat Bar Size |
Round Bar Size(mm) |
| Thickness |
Width |
Length |
Diameter |
Length |
| 10-500 |
100-1500 |
2000-6000 |
20-500 |
3000-6000 |
4.Product Process:
Electric-Furnace Smelting(EF)→Ladle Furnace(LF)→Vacuum Degassing(VD)→ Argon protected ingot →Multidirectional Forging → (Concave forging →)Normalizing+Hydrogen Diffusion Annealing → Ultrasonic Flaw Detection →Queching+Tempering Prehardened
5Feature:
1.Vacuum degassing refining processing steel purity, suitable for polishing or etch processing plastic mold.
2. In pre-harden state delivery, no need for heat treatment can be directly used for mold processing, shorten the construction.
3. After heat treatment machining and polishing performance is good, the nitriding treatment, can be suitable for chrome plating surface treatment, such as material is the qualitative hardness is uniform (400mm thick), good toughness and good machining performance.
4.Good hardness uniformity and polishing property, good machining properties.
5.Good integral mechanical performance under high temperatures.
6.Good heat-resistance and fatigue-resistance.
7. Pre-hardened to HRC30-36 can be directly used for mold processing, shorten the construction period.
Delivery Time
1) For abundant stock, 7-15 days.
2) For customized products, 15-30 days.
Loading Details:
FAQ:
Q1: What do you do for the control of the quality?
A1: Before loading into the container, our products will all be inspected by ultrasonic inspection. Quality Grade conforms to SEP 1921-84 E/e, D/d, C/c as per customer's request.
Q2:: What are your hot-selling products?
A2: D2/1.2379, H13/1.2344, CR12MOV, DC53, CR8, abundant stock for both plates and rounds. Competitive prices and short lead-time.
Q3: Can we visit your company and factory?
A3: 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.
Q4: Are you a manufacturer or merely a trader?
A4: We are a group of companies and owned manufacturer bases and trading companies. We specialized in plastic mold steel, hot work mold steel, cold work mold steel, alloy steel for mechanical, high-speed steel, etc. All materials are of high quality and competitive price.
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