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AISI 440B stainless steel, AISI 440B stainless steel supplier

AISI 440B stainless steel is a high carbon martensitic stainless steel containing good strength, moderate corrosion resistance and ability to obtain and maintain wear resistance and excellent resistance. AISI 440B stainless steel is commonly used in the oil, gas, marine, food and medical industries. Typical applications include valve components, knives, bearings, surgical tools and cutlery.
Chemical composition of AISI 440B stainless steel Max (%):

Grade

C

Mn

Si

P

S

Cr

Mo

440B

0.75-0.95

1.00

1.00

0.040

0.030

16.00-18.00

0.75

AISI 440B stainless steel Mechanical properties:

Tempering Temperature (°C)

Tensile Strength (MPa)

Yield Strength 0.2% Proof (MPa)

Elongation (% in 50mm)

Hardness Rockwell (HR C)

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

 

AISI 440B stainless steel can be slightly cold worked by common cold working methods. Welding is not generally recommended for AISI 440B stainless steel as it tends to harden in air. If this steel grade is welded the recommended temperature is 260°C (500°F) and for the post weld treatment the recommended temperature is 732-760°C (1350-1400°F).