1. Thickness:0.1mm - 80mm
Width:800mm - 2,000mm
Length:300mm - 12,000mm
3. Grades: Type 440C Stainless Steel
4. PVC film: Novacel(laser cutting)
5. Standard: ASTM/ASME UNS S44000
- Type 440C Stainless Steel is a high carbon martensitic stainless steel. It has high strength, moderate corrosion resistance, and good hardness and wear resistance. Grade 440C is capable of attaining, after heat treatment, the highest strength, hardness and wear resistance of all the stainless alloys. Its very high carbon content is responsible for these characteristics, which make 440C particularly suited to such applications as ball bearings and valve parts.
STANDARD CHEMICAL COMPOSITION
Type C Mn Si P S Cr Mo Ni N 440C min:0.95
max:1.00 max:1.00 max:0.04 max:0.03 min:16.0
NOMINAL MECHANICAL PROPERTIES
Tempering Temperature(°C) Tensile Strength (MPa) Yield Strength 0.2% Proof (MPa) Elongation (% in 50mm) Hardness Brinell (HB) Impact Charpy V (J) Annealed* 758 448 14 269HB max# - 204 2030 1900 4 59 9 260 1960 1830 4 57 9 316 1860 1740 4 56 9 371 1790 1660 4 56 9 * Annealed properties are typical for Condition A of ASTM A276# Brinel Hardness is ASTM A276 specified maximum for annealed 440A, B and C.
NOMINAL PHYSICAL PROPERTIES
Grade Density (kg/m3) Elastic Modulus (GPa) Mean Coefficient of Thermal Expansion (mm/m/°C) Thermal Conductivity (W/m.K) Specific Heat 0-100°C (J/kg.K) Electrical Resistivity (nW.m) 0-100°C 0-200°C 0-600°C at 100°C at 500°C 440C 7650 200 10.1 10.3 11.7 24.2 - 460 600
APPLICATIONS OF 440C STAINLESS STEEL SHEET/PLATE
- Rolling element bearings
- Valve seats
- High quality knife blades
- Surgical instruments
ADDITIONAL PROPERTIES OF 440C STAINLESS STEEL SHEET/PLATE
- Corrosion Resistance
>>Good resistance to the atmosphere, fresh water, foods, alkalies and mild acids. Best resistance in the hardened and tempered and passivated condition. A smooth polished surface also assists.
>>The corrosion resistance of grade 440C approximates that of grade 304 in many environments.
- Heat Resistance
Not recommended for use in temperatures above the relevant tempering temperature, because of reduction in mechanical properties by over-tempering.
- Heat Treatment
>>Annealing – Full anneal – 850-900°C, slow furnace cool to about 600°C and then air cool. Sub-critical Annealing – 735-785°C and slow furnace cool.
>>Hardening – Heat to 1010-1065°C, followed by quenching in warm oil or air. Oil quenching is necessary for heavy sections. Immediately temper at 150-370°C to obtain a wide variety of hardness values and mechanical properties as indicated in the accompanying table.
>>Tempering in the range 425-565°C is to be avoided because of reduced impact resistance and corrosion resistance. Tempering in the range 590-675°C results in lower hardness (the product become machinable) and high impact resistance.
If welding is necessary pre-heat at 250°C and follow welding with a full anneal. Grade 420 filler will give a high hardness weld (although not as high as the 440C), but 309 or 310 will produce soft welds with higher ductility.
In the annealed condition this grade is relatively easily machined; approximately the same as for high speed steel. Chips are tough and stringy so chip breakers are important. If these grades are hardened machining becomes more difficult and probably impossible.
- Corrosion Resistance
SURFACE FINISH OF 440C 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.
INNOVATIVE TECHNOLOGY of 440C 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 440C STAINLESS STEEL SHEET/PLATE
Our 440C 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.