Tianjin Xin Long Hong Ye Iron & Steel Trade Co., Ltd.
Main products:Stainless Steel Pipe,Stainless Steel Sheet,Stainless Steel Bar
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  • Contact Person : Ms. Cao Hong
  • Company Name : Tianjin Xin Long Hong Ye Iron & Steel Trade Co., Ltd.
  • Tel : 86-22-26631188
  • Fax : 86-22-26634488
  • Address : Tianjin,Tianjin,Rm 511, #4, Beichen Mansion, Beichen District, Tianjin, China
  • Country/Region : China
  • Zip : 300400

stainless steel plate

stainless steel plate
Product Detailed
reasonable price and good service

AISI440Cstainless steel plate/sheet  1)high carbon chromium steel  2)max hardness with stainless properties  3) Rockwell C 60

(1)440-C Stainless UNS S44004/GB 9Cr18Mo/AISI 440C/DIN 1.4125/JIS SUS440C

440-C stainless steel is a high carbon chromium steel.

When heat treated 440-C can be hardened to Rockwell C 60 which is the highest hardness of any stainless steel.

 (2)Chemistry Analysis

Carbon

0.95-1.20%

Manganese

1.00%

Phosphorus

0.040%

Sulfur

0.030%

Silicon

1.0%

Chromium

16.00 - 18.00%

Iron

77.98-80.23%

Molybdenum

0.75%

 (3)Heat Treatment

1)Annealing:

typical Heat uniformly, 1550/1600f (843/871c) Soak and cool very slow in furnace, brinell hardness approximately 223. Process anneal, heat uniformly to 1350/1400 (732/760c), air cool brinell hardness aprox 255.

 Before tempering make sure parts are to room temperature after hardening. This will complete the transformation of martensite, which is necessary to prevent non-uniform structures and hardness.

2)Hardening: Heat to 1850/1950f (1010/1066c) soak, quench in warm oil or air cool. Do not over heat, when overheated maximum hardness cannot be obtained. Take care to minimize temperature time at 2000f (1099c) to avoid excessive grain growth. For best corrosion resistance, temper below or around 800f (427c).

3)Tempering: Hardened 1900 f (1038c) oil quench and tempered one hour (1” rd)

Tempering temperature F

Tempering temperature C

Brinell Hardness

300

149

60

400

204

59

500

260

57

600

316

56

700

371

56

800

427

56

 (4)Corrosion Resistance

The following table is for reference only, many factors can affect the corrosive resistance, a corrosion test for each application should be applied.

Phosphoric acid

Restricted

Acetic Acid

Good

Sodium Hydroxide

Moderate

 

 

Salt Spray

Restricted

Nitric Acid

Moderate

Sulfuric Acid

Restricted

Humidity

Good

(5)Typical Room Temperature Tensile Properties

Hardened 1900f (1038c) and oil quenched, tempered 600f (316c)

0.2% Yield Strength

Ultimate Tensile Strength

% Elongation in 2” (50.8mm)

% Reduction of area

Brinell Hardness

ksi

Mpa

ksi

Mpa

 

 

ksi

275

1896

285

1965

2

10

580

(6)Machinability:

440C machines best in the annealed condition. Because of the high carbon it machines like high speed steel. The chips will be tough and string so a chip curler or breaker should be used. If polishing, use care in the tempered condition no to overheat as hardness will be compromised. If polishing is important an individually forged product will polish best.

 (7)Shapes Manufactured:

Flat Bars, Square Bars, Round Bars, Rings, Hollows, Discs, Blocks and special Shapes.

Send us a drawing to see how we can save you material and Machining time!

(8)Applications:

440-C stainless steel was originally used in bearing assembles, including ball bearings and races. It is widely used in cutlery, valve seats, needle valves, ball valves, pump parts, bushings and textile machinery.

stainless steel plate



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