Alloy 400 Stainless Steel Sheet/Plate

1. Thickness:0.1mm - 80mm
Width:800mm - 2,000mm
Length:300mm - 12,000mm

2. Surface:2B/HL/NO.4/8K

3. Grades: Alloy 400

4. PVC film: Novacel(laser cutting)
Nitto(deep drawing)

GAUGE REFERENCE [restabs alignment="osc-tabs-left" responsive="false"] [restab title="Product Overview" active="active"]

Alloy 400 (UNS N04400) is a ductile nickel-copper alloy with resistance to a variety of corrosive conditions. The alloy is most frequently specified in environments ranging from mildly oxidizing through neutral, and in moderately reducing conditions. An additional application area of the material is in marine environments and other nonoxidizing chloride solutions.

The alloy has a long history of use as a corrosion resistant material, dating back to the early twentieth century when it was developed as an attempt to use a high copper content nickel ore. The nickel and copper contents of the ore were in the approximate ratio which is now formally specified for the alloy.

As with commercially pure nickel, Alloy 400 is low in strength in the annealed condition. For this reason, a variety of tempers are used which have the effect of increasing the strength level of the material.


Weight% C Mn P S Si Ai Ni+Co Cu Fe
Alloy 400 0.10 0.50 0.005 0.005 <0.1 0.02 Balance 32.0 1.0


Room Temperature

Yield Strength Ultimate Tensile Strength Elongation% in 2'' Elastic Modules (E)
psi Mpa psi Mpa 51mm psi Mpa
35,000 240 75,000 520 45 26 x 106 180

Hot Rolled

Yield Strength Ultimate Tensile Strength Elongation% in 2'' Elastic Modules (E)
psi Mpa psi Mpa 51mm psi Mpa
45,000 310 80,000 550 30 26 x 106 180

Short Time Elevated Temperature

Test Temperature 0.2% Offset Yiled Strength Ultimate Tensile Strength Percent Elongation
psi Mpa psi Mpa
70 21 31,000 215 82,000 565 48
200 93 30,000 205 80,000 550 47
400 204 26,000 180 75,000 520 45
600 316 25,000 175 73,000 505 46
800 427 23,000 160 70,000 480 48
1000 538 21,000 145 53,000 370 40


  • Marine and chemical processing equipment
  • Valves, pumps, propeller shafts
  • Marine fixtures and fasteners
  • Gasoline and fresh water tanks
  • Process vessels and piping
  • Heat exchangers
[/restab] [restab title="Additional Properties"]


  • Corrosion Resistance
    >>more corrosion resistant than commercially pure Nickel (UNS N02200) under reducing conditions
    >>more resistant than refined copper alloys under oxidizing conditions.
    >>may be considered for use in moderately reducing acids, neutral or alkaline solutions
    >>resistant to most alkalies, salts, organic substances and atmospheric conditions.
    >>considered for cooler alkaline caustic conditions, although high temperature, high stress and high concentrations of caustic have produced caustic stress corrosion cracking in the material.
    >>used in reducing acids like sulfuric and hydrochloric, especially in the absence of aeration and oxidizing species.
  • Heat Treatment
    >>anneal cycle is typically in the 1400° to 1800°F (760° to 980°C) range for short times at temperature.
    >>annealing should be done in an atmosphere as free of sulfur compounds as possible since sulfur will embrittle the material in extended exposure time at the anneal temperature range.
    >>low temperature stress relief may be conducted on cold deformed material by heating to approximately 575°F (300°C) for 1 to 3 hours.
    >>large percentage of alloy is put into service without final heat treatment. This is done to increase the strength of the material.
  • Cold forming
    >>exhibits excellent cold forming characteristics normally associated with chromium nickel stainless steels.
    >>has a lower work hardening rate than Types 301/ 304 stainless steel
    >>can be used in multiple draw forming operations where relatively large amounts of deformation occur between anneals.
  • Welding
    >>may be joined by a variety of processes including gas tungsten-arc, gas metal-arc and shielded metal-arc processes.
    >>cleaning of the joint area is necessary to avoid embrittlement from such sources as lubricants and paints.
    >>material must be free of scale for best welding. Welding procedures for Alloy 400 are similar to those used for austenitic stainless steels.
    >>Neither preheating nor post-weld heat treatment are generally required.
[/restab] [restab title="Surface Finish"]

*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.
[/restab] [restab title="Innovative Technology"]


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.


[/restab] [restab title="Packing"]


Our alloy 400 stainless steel products are packed and labeled according to the regulations and customers’ requests.

stainless-steel-sheet-standardpackageNote: This is Yieh United Corporation’s standard seaworthy packing for stainless steel sheet metal.

stainless-steel-sheet-special-packageNote: This is Yieh United Corporation’s special packing for stainless steel sheet metal (Extra fee is needed).

[/restab] [restab title="FAQ"]


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?

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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