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1.4125 / SS440C

440C stainless steel can be forged by heating slowly and uniformly to 1050-1150°C, allowing sufficient time for the steel to become heated through. Ensure not to overheat as this can cause a loss of toughness and ductility.


 

1.4125 X105CrMo17 Z100CD17 X102CrMo
17KU ASTM A276 UNS S44004 AISI AMS


Analysis
Carbon0.95-1.20%Chromium16.00-18.00%
Manganese1.00% maxSulphur0.030% max
Silicon1.00% maxPhosphorous0.040% max
Molybdenum0.75% max


Form of Supply

TISCO Steel are suppliers and stockholders of round bar. Diameters can be sawn to your required lengths as one offs or multiple cut pieces. 440C precision ground steel bar can be supplied, providing a high quality stainless steel ground bar to your required tolerances.





Diameter

Applications

Suitable for applications requiring a combination of excellent wear resistance with moderate corrosion resistance, 440C is commonly used in the oil and gas, marine, food and medical industries. Typical applications are pumps, valve components, bearings, knives, surgical tools, cutlery, bearings and races.


Forging

440C stainless steel can be forged by heating slowly and uniformly to 1050-1150°C, allowing sufficient time for the steel to become heated through. Ensure not to overheat as this can cause a loss of toughness and ductility. Do not forge below 900°C reheating if necessary. After forging cool slowly in furnace or thermoinsulating material, then anneal immediately. Air cooling after forging may cause cracking.


Annealing

To anneal 440C stainless steel, heat uniformly to 840-875°C. Soak and cool very slowly in the furnace.


Hardening

To harden stainless steel 440C heat to 1010-1070°C, fully soak and quench in warm oil or air cool. Be careful not to overheat or full hardness will not be obtained.


Tempering

When tempering 440C a Rockwell hardness of 60HRc can be obtained. Temper for at least one hour. Tempering above 400°C is not recommended as this can cause a reduction in corrosion resistance and impact properties. 

 

Temperature [°C]150200250300350
Hardness [HRc]6059575656

Heat Treatment

Heat treatment temperatures, including rate of heating, cooling and soaking times will vary due to factors such as the shape and size of each stainless steel component. Other considerations during the heat treatment process include the type of furnace, quenching medium and work piece transfer facilities. Please consult your heat treatment provider for full guidance on heat treatment of 440C stainless steel.


Typical Mechanical Properties
Temp
°C
Tensile (UTS)
N/mm²
0.2% Yield
N/mm²
Elongation
(50.8mm) %
Hardness
HRc
Reduction
of Area
201965189625710


(*hardened at 1040°C, oil quenched and tempered at 250°C)


Certification

440C stainless steel grade is available with BS EN 10204 3.1 mill certificate, please request when placing any orders.


Quality Assured Supply

Stainless steel 440B specification is supplied in accordance with our ISO 9001 : 2008 registration.


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