1. Thickness:0.1mm - 80mm
Width:800mm - 2,000mm
Length:300mm - 12,000mm
3. Grades: 420
4. PVC film: Novacel(laser cutting)
Type 420 Stainless Steel provides both outstanding corrosion resistance and exceptional wear resistance. To obtain the best possible strength and wear resistance, oil quenching alloy 420 at a temperature between 1800° F and 1950° F. Alloy 420 Stainless Steel is commonly used in dental and surgical instruments, cutlery, plastics molds, pump shafts, steel balls, and numerous hand tool.
Because of its air hardening properties, type 420 Stainless Steel is not often welded, although, it is possible. When weldedwith stainless steel type 420, preheat the steel to a temperature between 300° F and 400° F. After welding, temper the work piece at temperature for two hours. When hot working, it is recommended to gradually raise the temperature to 1400° F and then gradually raise the temperature to anywhere from 2000° F to 2200° F. While working, avoid letting the work temperaturedrop below 1600° F by frequently reheating the steel. To prevent cracking, furnace cool the work piece slowly after working. Any extreme cold forming will cause alloy 420 Stainless Steel to crack, but it can endure minor cold work.
Grade 420 stainless steel is a higher carbon version of 410; like most non-stainless steels it can be hardened by heat treatment. It contains a minimum of 12 per cent chromium, just sufficient to give corrosion resistance properties. It has goodductility in the annealed condition but is capable of being hardened up to Rockwell Hardness 50HRC, the highest hardness of the 12 percent chromium grade. Best corrosion resistance is when the metal is hardened and surface ground or polished.
Related grades to 420 are high carbon high hardness martensitic stainless steel such as the 440 series and also variations to 420 containing molybdenum (for increased corrosion resistance), sulphur (for increased machinability) or vanadium (for higherhardness). A slightly higher carbon version of 420 is the non-standard grade 420C.
Martensitic stainless steel are optimised for high hardness, and other properties are to some degree compromised. Fabrication must be by methods that allow for poor weldability and usually also allow for a final harden and temper heat treatment. Corrosion resistance is lower than the common austenitic grades, and their useful operating temperature range is limited by their loss of ductility at sub-zero temperatures and loss of strength by over-tempering at elevated temperatures.
These properties are specified for bar product in ASTM A276. Similar but not necessarily identical properties are specified for other products such as stainless plate and forging in their respective specifications.
Typical compositional ranges for grade 420 stainless steel are given in table 1.
Table 1. Composition ranges for 420 grade stainless steel
|420||min. max.||0.15 -||- 1.00||- 1.00||- 0.040||- 0.030||12.0~14.0||-||-||-|
Typical mechanical properties for grade 420 stainless steels are given in table 2.
Table 2. Mechanical properties of 420 grade stainless steel
0.2% Proof (MPa)
(% in 50mm)
Charpy V (J)
|Annealed *||655||345||25||241 max||-|
|* Annealed tensile properties are typical for Condition A of ASTM A276;
annealed hardness is the specified maximum.# Due to associated low impact resistance this steel should not be tempered in
the range 425-600°C
Typical physical properties for annealed grade 420 stainless steel are given in table 3.
Table 3. Physical properties of 420 grade stainless steel in the annealed condition
of Thermal Expansion
|0-100°C||0-315°C||0-538°C||at 100°C||at 500°C|
Grade Specification Comparison
Approximate grade comparisons for 420 stainless steels are given in table 4.
Table 4. Grade specifications for 420 grade stainless steel
|Euronorm||Swedish SS||Japanese JIS|
|These comparisons are approximate only. The list is intended as a comparison of functionally similar
materials not as a schedule of contractual equivalents. If exact equivalents are needed original
specifications must be consulted.
Possible Alternative Grades
Possible alternative grades to grade 420 stainless steels are given in table 5.
Table 5. Possible alternative grades to 420 grade stainless steel
|Grade||Why it might be chosen instead of 420|
|410||Only a lower hardened strength is needed.|
|416||High machinability is required, and the lower hardened strength
and lower corrosion resistance of 416 is acceptable.
|440C||A higher hardened strength or hardness than can be obtained from 420 is needed.|
|"specials"||Variations of 420 are available to special order. These offer higher hardness,
corrosion resistance and machinability for particular applications.
Grade 420 has good resistance in the hardened condition to the atmosphere, foods, fresh water and mild alkalies or acids. Corrosion resistance is lower in the annealed condition.
Performance is best with a smooth surface finish. Less corrosion resistant than the austenitic grades and also less than 17% chromium ferritic alloys such as Grade 430; 420 also has slightly lower resistance than grade 410.
This grade is commonly used for cutlery - particularly blades of table knives and for some carving knives and similar. The corrosion resistance is sufficient to resist attack by food and normal washing methods, but prolonged contact with unwashed food residues can result in pitting.
Not recommended for use in temperatures above the relevant tempering temperature, because of reduction in mechanical properties. The scaling temperature is approximately 650°C.
Annealing - Full anneal - 840-900°C, slow furnace cool to 600°C and then air cool.
Process Anneal - 735-785°C and air cool.
Hardening - Heat to 980-1035°C, followed by quenching in oil or air. Oil quenching is necessary for heavy sections. Temper at 150-370°C to obtain a wide variety of hardness values and mechanical properties as indicated in the accompanying table.
The tempering range 425-600°C should be avoided.
Pre-heat to 150-320°C and post-heat at 610-760°C. Grade 420 coated welding rods are recommended for high strength joints, where a post-weld hardening and tempering heat treatment is to be carried out.
If parts are to be used in the "as welded" condition, a ductile joint can be achieved by using Grade 309 filler rod. AS 1554.6 pre-qualifies welding of 420 with Grade 309 rods or electrodes.
In the annealed condition this grade is relatively easily machined, but if hardened to above 30HRC machining becomes more difficult. Free machining grade 416 is a very readily machined alternative.
Typical applications include:
• Knife Blades
• Surgical Instruments
• Needle Valves
• Shear Blades
Value-added Service of Yieh United Stainless Steel Sheet
Every industry has its unique set of stainless steel sheet specifications and needs. We offer many Value Added Services to meet your needs from cut-to-length to hard-to-find materials and special requirements. With over 13 years in the business, our team is professional at finding out solutions to fit your needs.
Let Yieh United Corporation Be Your Partner！
|Stainless Steel Sheet Beveling||We can cut and bevel the edges of stainless steel sheet to prepare for welding or other processing.|
|Stainless SteelSheet Grinding||We can provide grinding service of stainless steel sheet in order to satisfy customers’ flatness requests.|
|Stainless SteelSheet Polishing||Our stainless steel sheet can be polished to a #4 polish, #6 polish,#7polish, or a #8 mirror finish. It can also be polished on one side or two sides.|
|Stainless SteelSheet Perforating||Our perforated stainless steel sheet comes in a selection of hole shapes, pattern sizes, gauges and grades. It has endless applications such as enclosures,partitions, sign panels, guards, screens, and more.|
|Stainless SteelSheet Laser Cutting||Our technologically advanced laser machines provide us with an efficient, high speed and cost effective form of profiling plate metal which ensures a superior clean cut and oxide free finish.|
|Stainless SteelSheet Water Jet Cutting||We offer stainless steel sheet dynamic water jet cutting in order to process complex part geometry.|
|Stainless SteelSheet Embossing||Our stainless steel embossed patterns including basket embossed pattern,diamond pattern or square pattern.|
|Stainless SteelSheet Decorating||We offer various decorative stainless steel sheet, such as stainless steel mirror plate, stainless steel hairline plate,color coated stainless sheet, etched stainless steel plate, vibration finish stainless steel plate, bead blast finish stainless steel plate, stain brush finish stainless steel plate, and more.|
|Stainless Steel Sheet Heatreating & Annealing||We can heatreat 410 and 17-4PH stainless steel plate to change mechanical properties. In some cases, secondary annealing 300 series might be required depending on the application.|
1. Customized Cutting Machine.
2. Cutting and Leveling Machine for cold rolled coils.
3. Noval Cutting and Leveling Machine for Hot Rolled coils.
SURFACE FINISH OF STAINLESS STEEL SHEET/PLATE :
*Not all finishes are available in all alloys - (contact Yieh United Sales for more information)
|#1 Finish||Hot rolled, annealed and pickled.|
|#2D Finish||A uniform, dull silver gray mill finish that is applied to thinner stainless steel coils,the thickness of which has been reduced by cold rolling.|
|#2B Finish||A semi polished surface achieved by finishing with the equivalent of a 80 to 120 grit abrasive. This finish has a pronounced grit line.|
|#3 Finish||A semi polished surface achieved by finishing with the equivalent of a 80 to 120 grit abrasive. This finish has a pronounced grit line.|
|#4 Finish||Also called brushed, directional or satin finish. A is characterized by fine polishing grit lines that are uniform and directional in appearance. The final abrasive used in the process is 150 to 220 grit.|
|#4 Satin Brush Finish||150 to 180 grit finish A fine directional polish, typically used in the washroom accessories industry. Most 3.5″ floppy diskette cover plates have this finish.|
|#6 Finish||Polished finish achieved with the equivalent of a 240 grit abrasive. Finer grit lines and higher reflectivity than a No. 4 finish.|
|#7 Finish||Highly reflective surface obtained with the equivalent of a 320 grit abrasive. Minimal grit lines.|
|No. 8 or True #8 mirror||This is the most reflective mirror finish on the market. All of the polishing, or “grit,” lines from the preliminary polishing operations are removed. The look is that of a glass mirror. Sometimes referred to as a non directional mirror finish, Super 8, No. 9, Perfect No. 10, and even No. 12 mirror.|
|CMP Super #8 mirror||Chemical Mechanical Polished Super #8 mirror finished sheets are guaranteed to be free from any manufacturing defects. This product represents the ultimate in mirror polished stainless steel. It is available as a single-sided or double-sided mirror polished sheet.|
|Hairline finish||80 – 140 grit finish A well defined directional polish. Starting base substrate is a No. 4 finish sheet; these sheets are polished to provide a “continuous long grain” hairline look. A finish which is popular with architects for its aesthetic, it is equally popular with fabricators due to it’s ease of fabrication and finish matching properties after welding operations.|
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INNOVATIVE TECHNOLOGY of STAINLESS STEEL SHEET/PLATE
At Yieh United Corporation, we never stop improving and developing our technologies to go beyond our customer’s expectations. We strive towards these goals to produce reliable products and ensure they can be fully utilized throughout their lifetime.
PACKING FOR STAINLESS STEEL SHEET/PLATE
Stainless steel products are packed and labeled according to the regulations and customers’ requests.
1. What is the minimum order quantity (MOQ)?
- Normally, the MOQ for our stainless steel sheet is 200 Kg. If we have any excess inventory of stainless steel sheet, there’s no MOQ requirement. You can ask us to check when you are interested in purchasing them.
2.What is the payment method?
- For new customers: 30%T/T deposit 70%T/T Before shipment. – For partners and distributors, 30%T/T deposit 70% T/T Against B/L Copy.
3.What is the acceptable currency?
- We accept USD, EUR and RMB.
4.What is the delivery time?
- 5 days in advance.
5.Where is the loading port?
- Normally, our loading ports are Shanghai, Tianjin, and Shenzhen. You can choose anyone of them, or you can select the other ports.
6.What is the delivery term?
- FOB, CIF, CFR, EXW
7.Do you offer free samples?
- Yes, based on our stock status, we will send our customer free samples. The express fee is to be paid by our customers.
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