Gear Steel And Bearing Steel

ASTM A756 440C Steel Bar

ASTM A756 440C Steel Bar
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Product Details

ASTM A756 specification covers the requirements for chromium-carbon bearing quality stainless steel to be used in the manufacture of anti-friction bearings. Grade 440C is a type of Martensitic stainless steel containing 16-18% Cr. It provides strong rust resistance, high temperature resistance and dimensional stability, can be used as corrosion resistant high temperature bearing steel.

 

Standards: ASTM A 756

Size: 3.3mm - 260mm

Surface treatment: Polished, rolled 


The Equivalent Standards:

DIN

ASTM

JIS

GB

1.4125

440C

SUS 440C

9Cr18Mo

 

Chemical composition:

C

Si

Mn

Cr

Ni

S

P

0.95 - 1.2

1.0

1.0

16.0-18.0

0.75

≤0.03

≤0.04

 

Maximum Hardness:

Hot-rolled-annealed   bars

255   HB

Cold-drawn-annealed   bars

255   HB

Tubes annealed-cold-drawn bars

As   agreed upon between the purchaser and the manufacturer

 

Heat treatment

1) Annealing, slow cooling at 800 ~ 920℃;

2) Quenching,1010 ~ 1070℃ oil cooling;

3) Tempering,100 ~ 180℃ fast cooling.


Applications

The 440C can be used to manufacture bearing parts that work in corrosive and non-lubricated environments with strong oxidation. It can also be used to make surgical knives, scissors, nozzles, bearings, etc. 440C is also applicable to the production of seawater, river water, nitric acid, steam and Marine corrosive media bearing, such as ships, submersible pump components in the bearing, petroleum and chemical machinery, Marine instruments bearing.

 

World iron&steel is a professional supplier of alloy steel rods and bars. We manufacture and distribute high quality 440C steel round bar for bearing application in accordance with standards ASTM A756, specified delivery conditions and final customer specifications for industrial and commercial applications. Special sizes of steel bars and delivery issues can be further negotiated and we provide a wide range of solutions for purchasing departments to select alternative grades, contact us today!


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