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TECHNICAL INFO

304 / 304L  1.4307

 Data Sheet

304 is the most common 18/8 austenitic stainless steel, very widely used in the food, pharmaceutical, breweries and chemical industries. 304 stainless is very popular in the building and domestic appliance sectors. The 304L grade has a reduced carbon content. The lower carbon content will help improve corrosion resistance after welding, and minimise carbide precipitation during the welding operation. As a stainless steel 304 has very good welding characteristics. Though continuous use of 304 stainless as high temperature is not recommended occasional service of 304 stainless up to 870ºC will give good oxidation resistance.

TYPICAL ANALYSIS        

C.

Mn.

P.

S.

Si.

Cr.

Ni.

0.08%

2.00%

0.045%

0.03%

1.00%

18.00-

8.00-

max.

max.

max.

min.

max.

20.00%

10.50%


304L grade limits carbon to 0.03% and increased nickel to 12%

Physical Properties 304
  Temperature    
 

20ºC

200ºC

400ºC

800ºC

Modulus of elasticity

20000

18500

17000

13500

kg/mm        
Specific heat

0.105

0.125

0.135

0.15

kcal/ºC        
Specific electrical resistance

0.7

0.8

1.0

1.15

(resistivity)        
  Mean value for:    
 

20-100ºC

20-200ºC

20-400ºC

20-800ºC

Coefficient of Thermal Expansion

17

17.5

18

19.5

x10-6 per ºC        
Density g/cm3 at 20ºC

7.9

 

   
Scaling temperature ºC

 875ºC

 

   

 

 
     
 
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