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Summary
SX 310 is a highly alloyed austenitic stainless steel
used for high-temperature applications. The high
chromium and nickel contents give the steel excellent
oxidation resistance as well as high strength at high
temperatures. This grade is also very ductile,
and has good weldability enabling its widespread usage
in many applications.
SX 310S is the low carbon version of SX 310 and is
suggested for applications where sensitisation, and
subsequent corrosion by high temperature gases or
condensates during shutdown may pose a problem.
SX 310 is manufactured in accordance with ASTM A 167
and SX 310S to ASTM A 240.
Typical
Applications
SX 310/310S find wide application in all
high-temperature environments where scaling and
corrosion resistance, as well as high temperature
strength and good creep resistance, are required.
Chemical
Composition
|
SX
|
C
|
Mn
|
P
|
S
|
Si
|
Cr
|
Ni
|
|
310
|
0.25
max
|
2.0
max
|
0.045
max
|
0.030
max
|
1.5
max
|
24.0
- 26.0
|
19.0
- 22.0
|
|
310S
|
0.08
max
|
2.0
max
|
0.045
max
|
0.030
max
|
1.5
max
|
24.0
- 26.0
|
19.0
- 22.0
|
Typical
Properties in the Annealed Condition
The properties quoted in this publication are typical
of mill production and unless indicated should not be
regarded as guaranteed minimum values for
specification purposes.
1.
Mechanical Properties at Room Temperature
|
|
SX
310
|
SX
310S
|
|
|
Typical
|
Minimum
|
Typical
|
Minimum
|
|
Tensile
Strength, MPa
|
625
|
515
|
575
|
515
|
|
Yield
Stress (0.2 % offset), MPa
|
350
|
205
|
290
|
205
|
|
Elongation
(Percent in 50mm)
|
50
|
40
|
50
|
40
|
|
Hardness
(Brinell)
|
172
|
-
|
156
|
-
|
|
Endurance
(fatigue) limit, MPa
|
260
|
-
|
260
|
-
|
2.
Properties at Elevated Temperatures
The values quoted are those for SX 310.
Enquire for data on 310S .
Short
Time Elevated Temperature Tensile Strength
|
Temperature,
oC
|
550
|
650
|
750
|
850
|
950
|
1050
|
|
Tensile
Strength, MPa
|
550
|
430
|
280
|
180
|
90
|
50
|
Creep
data
Stress to develop a creep rate of 1% in the indicated
time at the indicated temperature.
|
Time
|
TemperatureoC
|
550
|
600
|
650
|
700
|
750
|
800
|
|
10
000 h
|
Stress
MPa
|
110
|
90
|
70
|
40
|
30
|
15
|
|
100
000 h
|
Stress
MPa
|
90
|
75
|
50
|
30
|
20
|
10
|
Creep
Rupture Stress
|
Time
|
Temperature
oC
|
600
|
700
|
800
|
900
|
1000
|
|
1
000 h
|
Stress
MPa
|
190
|
110
|
50
|
35
|
15
|
|
10
000 h
|
Stress
MPa
|
170
|
70
|
35
|
20
|
10
|
|
100
000 h
|
Stress
MPa
|
110
|
55
|
25
|
10
|
2
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Recommended
Maximum Service Temperature
(Oxidising Conditions)
Continuous
1150oC
Intermittent
1035oC
Thermal
Processing
-
Annealing.
Heat from 1050 to 1150oC and water
quench. This treatment ensures that all
carbides are in solution.
-
Hot
working
Initial
forging and pressing:- 1150 - 1200oC
Finishing
temperature:- above 950oC
Note:
Soaking times to ensure uniformity of temperature are
up to 12 times that required for the same
thickness of mild steel.
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