Production Description:
1. Steel Grade: AISI 420 Mat. No. 1.4021 DIN X20cr13
2. Product name: AISI 420 Mat. No. 1.4021 DIN X20cr13 Chromium Steel Bar
3. Length: 3000-12000mm or as required
4. Diameter: 3-2000mm
Steel AISI420 (Mat.No. 1.4021, DIN X20Cr13, AISI 420)
Designation by Standards
| Brand Name |
Ravne No. |
Mat. No. |
DIN |
EN |
AISI |
| AISI420 |
905 |
1.4021 |
X20Cr13 |
X20Cr13 |
420 |
Chemical Composition (in weight %)
| C |
Si |
Mn |
Cr |
Mo |
Ni |
V |
W |
Others |
| 0.20 |
max. 1.0 |
max. 1.50 |
13.0 |
- |
- |
- |
- |
- |
Description
This alloy is a general purpose heat treatable chromium steel which is a popular cutlery grade. Martensitic stainless steel.
Applications
Dental and surgical instruments, cutlery, pump shafts, plastic molds and dies, steel balls, and various hand tools, pump components, shafts, turbine blades, pressing dies for tablets, glass and plastics processing tools.
Physical properties (avarage values) at ambient temperature
Modulus of elasticity [103 x N/mm2]: 216
Density [g/cm3]: 7.73
Thermal conductivity [W/m.K]: 30.0
Electric resistivity [Ohm mm2/m]: 0.60
Specific heat capacity[J/g.K]: 0.46
Coefficient of Linear Thermal Expansion 10-6 oC-1
| 20-100oC |
20-200oC |
20-300oC |
20-400oC |
20-500oC |
| 10.5 |
11.0 |
11.5 |
12.0 |
12.0 |
Modulus of Elasticity [103 N/mm2]
| 20oC |
200oC |
400oC |
| 216 |
205 |
190 |
Continuous Cooling Transformation (CCT) Diagram
Click the image to enlarge the diagram.
Soft Annealing
Heat to 730-810oC, air cooling. Structure is ferrite with spherical carbides.
Hardening
Harden from a temperature of 950-1050oC followed by oil, air quenching.
Tempering
Tempering temperature: 650-750oC. Transformation structure with ferrite.
Mechanical Properties at Room Temperature
| Size range mm |
Heat treatment condition |
0.2 % proof stress (N/mm2) |
Tensile strength (N/mm2) |
Elongation (%) |
Notch impact energy (ISO-V) (J) |
Hardness HB max. |
| d<=160 |
Q+T 700 |
500 |
700-850 |
13 |
25 |
230 |
| d<=160 |
Q+T 800 |
600 |
800-950 |
12 |
20 |
230 |
0.2 % Proof Stress (N/mm2) at Elevated Temperatures
| Condition |
100oC |
150oC |
200oC |
250oC |
300oC |
350oC |
400oC |
| Q+T 700 |
460 |
445 |
430 |
415 |
395 |
365 |
330 |
| Q+T 800 |
515 |
495 |
475 |
460 |
440 |
405 |
355 |
Diagram Tempering Temperature - Mechanical Properties
Click the image to enlarge the diagram.
Forging
Hot forming temperature: 1100-850oC.
Machinability
Similar to machining some of the high carbon tool steel, this alloy has tough, stringy chip build-up.
Embittlemnt: It must be in mind that the temperature range between 425 and 525oC must be avoided owing to embritllement at 475oC.
Corrosion Resistance
420 is resistant to the atmosphere, fresh water, dilute acids and alkalis and fruit and vegetable juices.
Welding
Not commonly welded due to its air hardening characteristics. Welding may be performed after preheating to 149-204oC with post weld tempering at temperature for 2 hours. Filler metal should be AWS E/ER420.
Company Information
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, ilitary, power plant, nuclear power, pressure vessel, boiler equipment, mold manufacture, etc.
steel coil
l steel plate
l steel sheet
l steel bar/rod
steel round bar
steel flat bar
steel square bar
l steel pipe/tube ( welded or seamless )
steel round pipes
steel square pipes
steel welded tubes
steel seamless tubes
l steel strip
l steel beam
l steel angle
l steel channel
l steel flange
l Steel wire
Bozhong Group can supply a variety of structural steel, high-strength steel, wear-resistant steel plate, boiler and pressure vessel steel, marine engineering and stainless steel plate in the thick steel and various European standard bars and pipes and profiles.Our global sales and service network throughout all around the world to ensure that the goods reach the customer in the shortest time.
We can follow your drawings and requirements, to provide you with oxygen cutting, plasma cutting and laser cutting and other processing services. You can also perform ultrasonic testing in accordance with EN10160 standard, EN10164 standard test Z15, Z25, Z35, weld bending detection, PWHT detection,etc.
We have ISO9001: 2000 quality management system certification, and obtain the quality certification from all the well-known certification company, including TuV / LRS / GL / CE and so on.
Special steel includes as below:
Boiler and pressure vessel steel
Pipeline steel
Bridge steel
Nuclear power steel
Structural steel
Die steel
High strength steel
Abrasion resistant steel
Weathering, corrosion resistant and fire resistant steel
High rise building steel
Shipbuilding and offshore engineering steel
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.
Customer Visiting:
Warmly welcome! Pick up your phone and Call us!
Send us the inquiry here!
We will reply you at the first time.
){kind=link}