Product \ Round \ Austenitics \ 1.4305

1.4305

INT

X8CrNiS18-9

1.4305 round stainless steel is popularly known as 303 grade stainless steel. Grade 303 is the easiest to machine among all austenitic stainless steel grades.

The workable nature of the 303 grade is due to the presence of Sulfur in the steel composition. While sulfur improves machining, it also causes a decrease in corrosion resistance and a slight decrease in toughness. The corrosion resistance of 303 stainless steel is lower than that of 304. Toughness is still excellent as with other austenitic grades.

The property data given in this document is typical for bar products in EN 10088-3: 2005. ASTM or other standards may cover products sold. It is reasonable to expect the specifications in these standards to be similar, but not necessarily the same as those given in this datasheet.

 

Electrical Properties

Electrical Resistance

0.72 x10 ^ -6 Ω .m

Hardness HB

Max 230

Magnetic susceptibility

-

 

Process Properties

Machinability

Very good

Hot Forming

good

Cold Forming

low

 

Thermal Recovery

Softening Annealing

1010-1120 ℃

30 min

Specific Thermal Capacity W / m.K

15

 

The 1.4306 / 304L round stainless steel grade also corresponds to the following designations:

UNS S30300

BS 303S31

EN 58M

 

Machinability

303 stainless steel has excellent machinability. Machining can be improved by following the following rules: Cutting edges must be kept sharp. Blind edges cause over processing to harden. The cuts should be light but deep enough to prevent hardening by getting on the metal surface. Chip breakers should be used to keep chips away from work. The low thermal conductivity of austenitic alloys causes heat to concentrate at the cutting edges. This means that coolants and lubricants are required and must be used in large quantities.

 

Weldability

The addition of sulfur found in 303 stainless steel causes poor weldability. If 303 needs to be welded, recommended filler rods or electrodes are 308L and 309 grade stainless steels. Welds should be annealed for maximum corrosion resistance.

  Dimensions  mm
X8CrNiS18-9      

 

Chemical Composition

Grade C Cr P Mn S Ni Si

1.4305

0.10 max

19.00 max

0.040 max

2.00 max 0.015 max 10.00 max

0.75

 

Physical Properties

Main application areas are in chemical and petrochemical industry, seawater desalination

 

Mechanical Properties

Yoğunluk

g/cm3

Isı geçirgenliği J/kg K Termal iletkenlik W/m K

Elektriksel direnç miktarı

Ω mm2/m

7.9

500 15

0.73

 

Sertlik HB 30

≤  HB

0.2%Akma dayanımı R ≥

 N/ mm2

Gerilme direnci R N/ mm2

Uzama A ≥ %

Elastisite Modülü kN/mm2

215

175

460-680

45/35

200