430 1.4016 Stainless Steel

430 1.4016 Stainless Steel

430 1.4016 Stainless Steel Type 430 stainless steel is one of the most widely used of the “non-hardenable” ferritic stainless steels. It combines good corrosion resistance with heat and oxidation resistance up to 1500°F. Stainless is created by extracting chromite from underground mines. The...
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430 1.4016 Stainless Steel

Type 430 stainless steel is one of the most widely used of the “non-hardenable” ferritic stainless steels. It combines good corrosion resistance with heat and oxidation resistance up to 1500°F.


Stainless is created by extracting chromite from underground mines. The chromite is crushed to produce a chromite concentrate. The chromite concentrate is melted in an electric furnace with other raw materials (iron ore, manganese, nickel, etc.) use for the specific stainless type.


After melting the material is formed into slabs and sent to a hot rolling mill. The rolling mill reduces the thickness of the steel and is cooled by water. The now coil is transferred to a cold rolling mill.


When the material arrives at the cold rolling mill it is covered in black scale. It is sent through an annealing and pickling line to remove the scale.


Chemical Compositions

Element% Present (in product form)

C, H, P

L

Carbon (C)

≤0.08

≤0.08

Silicon (Si)

≤1.00

≤1.00

Manganese (Mn)

≤1.00

≤1.00

Phosphorous (P)

≤0.040

≤0.040

Sulfur (S)

≤0.015

≤0.0301)

Chromium (Cr)

16.00 - 18.00

16.00 - 18.00

Iron (Fe)

Balance

Balance


Minimum values of the 0.2 %-Yield strength of ferritic steels at elevated temperatures

ProductHeat Treatment Condition0.2 %-Yield strength at the temperature °C
100150200250300350400
C, H, P, LAnnealed220215210205200195190


Reference data on some physical properties

Density at 20°C kg/m3
7,700
Modulus of Elasticity kN/mm2 at

20°C

220

200°C

210

400°C

195

500°C

-

Thermal Conductivity W/m K at 20°C


25

Specific Thermal Capacity at 20°C J/kg K


460

Electrical Resistivity at 20°C Ω mm2 /m


0.60


Mean linear thermal expansion coefficient 10-6 K-1 between 20°C and

100°C10.5

200°C

11.0

300°C

11.5

400°C

12.0

500°C

12.0


Processing

Cold forming with low amount of deformation is easily feasible above room temperature. Sharp chamfers parallel to the direction of rolling have to be avoided. Sheets with greater thicknesses and/or higher amount of deformation should be preheated up to 200 - 400 °C. If applicable, a hot forming at 700 - 900 °C can be necessary. 


The corrosion resistance is affected by annealing colors, which occur after hot forming or welding, or scalings. These have to be removed by pickling (pickling solution), grinding or sand blasting. It is only allowed to use iron-free tools for these workings. Machining does not differ from machining of non-alloy carbon steels with comparable or corresponding strength.


Remark

According to DIN EN 10095, appendix D material 1.4016 is deemed to be heat resisting.


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