| Customization: | Available |
|---|---|
| Type: | Steel Bar |
| Standard: | ASTM, AISI, GB, JIS, DIN |
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Chemical Composition (in weight %)
| C | Si | Mn | Cr | Mo | Ni | V | W | Others |
| 0.14 | max. 0.40 | 0.55 | 0.98 | 0.60 | - | - | - | max. Cu = 0.30 |
Description
Alloy special structural steels. Cr-Mo-steels with > 0.35% Mo.
Applications
Precision stamping die.
Precision punching die for wire cutting and punching die for various purposes.
Tools for plastic deformation of difficult-to-machine materials.
Die for cold forging, deep drawing and thread rolling.
other
High-speed punching punch and stainless steel punch.
Stretching die, crimping die, embossing die, wearable plastic forming die.
Factory state: HB230-250
Physical properties (avarage values) at ambient temperature
Modulus of elasticity [103 x N/mm2]: 210
Density [g/cm3]: 7.85
Soft Annealing
Heat to 680-720oC, cool slowly in furnace.
Hardening
Harden from a temperature of 910-940oC followed by oil or air quenching.
Tempering
Tempering temperature: 650-720oC.
hardness value
Take three different locations for each sample to measure the hardness, get the hardness value at each tempering temperature, and integrate the hardness value of each sample. When A2 is tempered at 100 ~ 500 ºC, the hardness value does not change much; The hardness is slightly higher during tempering at 400 ° C. The peak hardness after standard heat treatment is generally around 520 ° C; after tempering at 600 ° C, the hardness drops significantly, and the average HRC hardness value is only 52.4, so the tempering temperature is not suitable. Too high.
Impact toughness
After tempering, the oxidized decarburization layer on the surface of the sample is ground away, and the impact value of each sample at different tempering temperatures is measured. The impact value of each sample is integrated. When DC53 is tempered at 200 ° C, the average impact value reaches 60 J / cm2 or more. When tempered at 500 ºC, the impact toughness is poor, showing a certain high temperature tempering brittleness. Temper above 600 ºC tempering impact toughness is very good, but the hardness is greatly reduced, can not meet the requirements of use.
The experimental results show that the overall tempering stability of A2 is good. In a certain tempering temperature range, the hardness and impact value do not change much; the toughness decreases greatly during tempering at 400 ~ 500 ºC, and the phenomenon of temper brittleness occurs at 600 When tempered at ºC, the toughness of the sample is very high, the impact value reaches 85 J / cm2, but the hardness is greatly reduced. In the production, for some cold work molds with low hardness and wear resistance requirements and high toughness requirements, Use high temperature tempering; cold work molds with high hardness requirements and high toughness, low temperature tempering at about 200 ºC should be used. For other tempering temperatures, hardness and impact values can be calculated using appropriate methods ( Such as interpolation method, function approximation, etc.) prediction, and then verified by experiment. The carbides in the quenched samples are distributed in intermittent thin strips, and the carbides are evenly distributed after tempering at 200 ºC, and there are almost no large blocks in the structure. Carbide, so the toughness is better. From the fracture morphology, the cleavage step of the tempered structure fracture at 200 ºC is far less than that of the quenched sample. The fracture in 5000 times metallography has some small and shallow tough dens, which shows that it has a certain Toughness. After tempering, residual austenite turns Become more fully, the carbides are fine and evenly distributed, which increases the toughness.
Mechanical Properties in Hardened and Tempered Condition
| Diameter in mm | 0.2 % proof stress (N/mm2) | Tensile strength (N/mm2) | Elongation (%) | Impact strength (J) |
| up to 60 | 295 | 440-590 | 20 | 44 |
| 61-90 | 285 | 440-590 | 20 | 44 |
| 91-150 | 275 | 440-590 | 20 | 44 |
0.2 % Proof Stress (N/mm2) vs. Temperature
| 100oC | 150oC | 200oC | 250oC | 300oC | 350oC | 400oC | 450oC | 500oC |
| 260 | 245 | 240 | 230 | 215 | 200 | 190 | 180 | 175 |
| 250 | 240 | 230 | 220 | 205 | 190 | 180 | 170 | 165 |
| 250 | 235 | 220 | 210 | 195 | 180 | 170 | 160 | 155 |
1 % Creep Limit (N/mm2) vs. Temperature (oC)
| Hours | 450oC | 460oC | 480oC | 500oC | 520oC | 540oC | 560oC |
| 10 000 | 245 | 228 | 193 | 157 | 122 | 90 | 64 |
| 100 000 | 191 | 172 | 133 | 98 | 70 | 46 | 30 |
Creep Rapture Strength (N/mm2) vs. Temperature (oC)
| Hours | 450oC | 460oC | 480oC | 500oC | 520oC | 540oC | 560oC |
| 10 000 | 370 | 348 | 304 | 239 | 179 | 129 | 91 |
| 100 000 | 285 | 251 | 190 | 137 | 94 | 61 | 40 |
| 200 000 | 260 | 226 | 167 | 115 | 76 | 50 | 32 |
Forging
Hot forming temperature: 1100-850oC.
Excellent characteristics
(1) The heat treatment hardness of DC53 is higher than that of SKD11:
DC53 high temperature (520-530 ºC) after tempering can reach 62-63HRC high hardness, therefore, the strength and wear resistance of DC53 can exert its performance more than SKD11
(2) The toughness is twice as high as SKD11:
Among the tool steels for cold working, DC53 has the highest toughness, so it can prevent cracking and chipping of tools and molds.
Cracks and cracks appear, increasing the service life;
(3) DC53 can improve the huge carbide of SKD11:
The size of DC53's huge carbides is improved to less than 1/3 of SKD11, so it can prevent the chipping (Chipping) that causes mold damage.
Practical features
(1) Machinability and abrasion are better than SKD11, so the tool life is longer and the number of processing hours is less.
(2) The quench hardening energy is higher than SKD11, so it can improve the defect of insufficient hardness during vacuum heat treatment.
(3) The high temperature tempering can reduce the residual stress and eliminate the residual austenitic iron, which can prevent the cracking and deformation of the wire cutting process.
(4) The surface hardness after surface hardening is higher than that of SKD11, so the performance of the mold can be improved.
(5) Since the preheating and postheating temperatures are lower than SKD11, the repair welding operation is relatively simple.
Machinability
No data.
Forms manufactured: Please see the Dimensional Sales Program.
Disclaimer
The information and data presented herein are typical or average values and are not a guarantee of maximum or minimum values. Applications specifically suggested for material described herein are made solely for the purpose of illustration to enable the reader to make his own evaluation and are not intended as warranties, either express or implied, of fitness for these or other puposes. There is no representation that the recipient of this literature will receive updated editions as the become available.
What we can offer?
We offer a wide range of steel products in a wide variety of dimensions and executions, acc.to the common international specifications or customerized.
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
Quality Assurance:
Below inspection will be done in the production.
(1) ray detection---RT;
(2) ultrasonic testing---UT;
(3) Magnetic Particle Testing-MT;
(4) penetration testing-PT;
(5) eddy current flaw detection-ET
Our Company:
Bozhong Group Mainly supply in forms of coil, sheet, plate, rod, bar, tube, pipe, beam, angle, flange, wire, strip, channel, etc., with various varieties, wide range of dimensions, high purity, stable chemical composition, high dimensional accuracy and excellent surface quality. The products are mainly used in the fields of industries such as automobile engineering, railway transportation, aviation, aerospace, machinery, petrochemical, energy, environmental protection, offshore, chemical, oil & gas, military, power plant, nuclear power, pressure vessel, boiler equipment, mold manufacture, etc.
Our Team:
Our Service For You
Pre-sale Service
1. Sample can be offered with sample charge and courier fee by buyer's side.
2. We have full stock,and can deliver within short time.Many styles for your choices.
3. OEM and ODM order are accepted, Any kind of logo printing or design are available.
4. Good Quality + Factory Price + Quick Response + Reliable Service, is what we are trying best to offer you
5. All of our products are produce by our professional workman and we have our high-work-effect foreign trade team, you can totally believe our service.
6. We have 8 year experience of design, manufacture and sell lingerie, we cherish every order from our honor.
After you choose
1. We will count cheapest shipping cost and make invoice to you at once.
2. Check quality again, then send out to you at 1-2 working day after your payment,
3. Email you the tracking no, and help to chase the parcels until it arrive you.
After-sale choose
1. We are very glad that customer give us some suggestion for price and products.
2. If any question,please contact with us freely by E-mail or Telephone.
FAQ:
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 don'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 you provide a sample for our testing before confirm the order?
A: Yes. We can provide sample to you for approval before you place an order to us. Free sample is available if we have stock.
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.
contact:
Name: Alicia Liu
Derect Line: 021-67897511
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