SX
310 Technical Data
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 |
Recommended
Maximum Service Temperature
(Oxidising Conditions)
Continuous
1150oC
Intermittent
1035oC
Thermal
Processing
1. Annealing.
Heat from 1050 to 1150oC and water quench.
This treatment ensures that all carbides are in
solution.
2. 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.
