¬ AISI310
» AISI310

Definition :

310 quality is designed to withstand high temperature service. Despite this feature, material softness and weldability are quite good. It can operate continuously at 1150 degrees and does not rust. It can operate intermittently at 1040 degrees. Like other austenitic grades, it has excellent toughness. 
The 310S quality is resistant to high temperatures both in moist and dry environments. The low carbon content of the 310S allows it to withstand temperatures less than 310 does.

 

Chemical Composition :


Quality

C

Mn

Si

P

S

Cr

Mo

Ni

N

310

min.
max.

-
0.25

-
2.00

-
1.50

-
0.045

-
0.030

24.0
26.0

-

19.0
22.0

-

310S

min.
max.

-
0.08

-
2.00

-
1.50

-
0.045

-
0.030

24.0
26.0

-

19.0
22.0

-

 

Corrosion Resistance :

The high chromium (Cr) alloy - normally added for high heat resistance - provides good corrosion resistance in aqueous environments. It provides an excellent corrosion resistance at normal temperatures, and a good resistance to oxidization and carburation in high temperature environments. 
It is resistant to smoky nitric acid at room temperature, and nitric acid at 425 degrees. Corrosion stress breakage is possible, but it is more resistant than 304 and 316.

 

Heat Resistance :

It intermittently provides good resistance to rusting at temperatures ranging from 1040 to 1150 degrees with air temperature. Continuously, it shows good resistance at 1150 degrees. It has a good resistance to heat stress and periodic temperature. It is usually used in the environments with sulfur dioxide gas.
It is not advisable due to continuous carbide sedimentation at temperatures between 425-860 degrees. 

 

Heat Treating (Annealing) :

The annealing temperature is between 1040-1150 degrees and is cooled rapidly for maximum corrosion. This heat treatment is recommended to be repeated in environments which operates at 650 degrees to maintain softness every 1000 hours. It can not be hardened by heat treatment.

 

Mechanic Features :


Quality

Tensile Resistance (MPa) 
min

Yielding Resistance 0.2% Proof
(MPa) 
min

Stretching 
(% in 50mm) min

Hardness

Rockwell B 
(HR B)
max

Brinell 
(HB)
max

310

515

205

40

95

217

310S

515

205

40

95

217

 

 

Physical Features :


Quality

Density
(kg/m3)

Coefficient of Elasticity
(GPa)

Coefficient of thermal expansion : 
(mm/m/°C)

Thermal Conductivity
(W/m.K)

Specific Heat 0-100°C
(J/kg.K)

Electricity resistance
(nW.m)

0-100°C

0-315°C

0-538°C

at 100°C

at 500°C

310/S

7750

200

15.9

16.2

17.0

14.2

18.7

500

720

 

Areas of Use :

Oven parts
Oil burner parts
Carbonization containers
Heat treatment baskets
Heat exchangers
Welding wires and electrodes