Grade 430

430 grade stainless steel is available from 0.4mm to 12mm in our stocks. This grade has good oxidation resistance upto 550-600°C. It is used in non-humid conditions, machine accessories, and for decorative purposes.

PHYSICAL PROPERTIES / 430 

All values given are for 20C unless otherwise specified. Units
Density 7 800 kg/m³
Elastic Modulus (Tension) 200 GPa
Specific Heat Capacity 460 J/kg K
Thermal Conductivity: 100°C’de 26,1 W/mK
500°C’de 26,3 W/mK
Electrical Resistivity 600 n m
Mean Co-efficient of
Thermal Expansion: 0 – 100°C 10,4 µm/mK
0 – 315°C 11,0 µm/mK
0 – 538°C 11,4 µm/mK
0 – 700°C 12,1 µm/mK
Melting Range 1425 – 1510°C
Relative Permeability Ferromagnetic

MECHANICAL PROPERTIES

MECHANICAL PROPERTIES AT ROOM TEMPERATURE(ASTM A240)

Tensile Strength 450 MPa min
0,2% Proof Strength 205 MPa min
Elongation 20%< 1,27 mm kalınlık
22%> 1,27 mm kalınlık
Hardness 183 max BHN
Cold Bend 180 over material thickness

 

PROPERTIES AT ELEVATED TEMPERATURES
Values quoted are typical of 430 in the annealedcondition.

These values are given as a guideline and should not be used for design purposes.

SHORT TIME ELEVATED TEMPERATURE TENSILE STRENGTH

Temperature°C 500 600 700 800
Tensile Strength (MPa) 330 205 103 50

CREEP RUPTURE STRENGTH (10 000 HOURS )

Temperature°C 480 540 600 700
Stress (Mpa) 179 90 45 25

MAXIMUM RECOMMENDED SERVICE TEMPERATURE

Temperatures quoted for service in air (i.e. in oxidising conditions):

Continuous        815°C
Intermittent        870°C

Note:430 is subject to embrittlement if used for extended periods in the temperature range of 400-500°C.

CORROSION RESISTANCE
430 has good resistance to a wide variety of corrosive environments including nitric acid and some organic acids. It is generally used for highly polished trim applications in mild atmospheres such as for food processing and dairy equipment. Atmospheric corrosion resistance is good, although in highly polluted or marine environments staining will occur.
Aşağıda 430 için münferit asit ortamlarında iso-korrozyon şemaları sunulmuştur.
FABRICATION
430 has good formability characteristics with useful mechanical properties. Its good ductility allows it to be readily formed by bending and deepdrawing. 430 does not undergo significant work hardenning whwn cold formed.
In order to meet the needs of the market place, Columbus Stainless has developed a deep drawing guality 430. This material designated SX 430 DDQ is suitable for drawn applications such as holloware, sink bowls, etc. To ensure the correct allocation of material, if drawing quality is required, orders must state 430 DDQ. In order to best suit customer’s and use it is imperative that this actual end use is stated when 430 DDQ is ordered.
Being ferritic, 430 is prone to grain growth in the heat affected zone of weldments. As such the tensile, fatigue and toughness properties in the welded condition are poor. 430 should thus not be used for applications where tensile or dynamic loading will be experienced.
430 is generally limited to a combined thickness of 3mm in the welded condition, i.e. for lap joints- this is equivalent to 2 x 1,5 mm thicknesses being welded together. The use of austenitic filler metals such as types 308L, 309L or 316L will improve the ductility of welds to some extent but all welding procedures should nevertheless endeavour to maintain minimum heat inputs.