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1.4301 
Material No.1.4301
EN symbol X5CrNi18-10
AISI/SAE304
UNSS 30400
AFNORZ7CN 18-09
B.S.304 S15 – 304 S31
StandardsEN 10088-3

Description

The most popular stainless steel has an economic balance of alloying elements to ensure its good cold
formability, corrosion resistance, toughness and good mechanical properties with no excessive workhardening. It performs well in unpolluted atmospheres but can tarnish or lightly rust in damp atmospheres around some industrial and on/offshore locations. The steel has been used extensively for potable water tubing and in fresh feedwater systems where precautions are taken to avoid crevice attack under deposits,etc. Performance in aerated seawater is not good without  adequate galvanic or cathodic protection. Stability and toughness at cryogenic temperatures is high.

The stainless austenitic chromium-nickel steel 1.4301 shows good corrosion resistance (particularly in natural environmental media and in the absence of considerable chlorine and salt concentrations and sea water) and weldability. Application with acids have to be checked individually. However, after welding 1.4301 is not stable to intergranular corrosion. Good polishing and deep drawing property. It is used in the crude oil industry, chemical industry, petrochemical industry, automobile industry.

 

Chemical composition (%)

 CMnPSSiNiCrMoTiNb
TP3040.08 2.00 0.045 0.030 1.00 8-10.518-20    
SUS3040.08 2.00 0.040 0.030 1.00 8-11.018-20    
1.4301 X5CrNi18-100.07 2.00 0.040 0.015 1.00 8-10.517-19.5  0.11  

 

Special characteristics

Temperature rangeDensity kg/dm³Hardness (HB)
Due to an inclination to precipitate chromium carbides, application temperatures of 450°C-850°C have to be tested carefully (DIN EN 10088-3)7,9160-190

 

Welding filler for welded pipe & tube

AWS 5.4 AWS E308/308L-16  

ASME SFA 5.4 UNSW30813

Electrode/filler rod 1.4316 (308L), 1.4302, 1.4551

Main fields of application(depending on the specific conditions of use)

crude oil industry, chemical industry, petrochemical industry, construction industry, food industry