316H Stainless Steel
316H is a high-carbon austenitic stainless steel grade, a modified version of UNS S31600. Its chemical composition specifies 16.0-18.0% Cr, 10.0-14.0% Ni, 2.0-3.0% Mo, with carbon controlled between 0.04-0.10%—exceeding standard 316’s 0.08% maximum.
This intentional carbon elevation enhances high-temperature creep resistance and rupture strength, critical for sustained service at 650-870°C. It maintains excellent pitting and crevice corrosion resistance in chloride environments, inherited from 316’s molybdenum addition.
Chemical Composition
|
C |
Si |
Mn |
P |
S |
Cr |
Ni |
Mo |
|
|
Min |
0.04 |
- |
- |
- |
- |
16 |
10 |
2 |
|
Max |
0.1 |
1 |
2 |
0.045 |
0.03 |
18 |
14 |
3 |
Material Properties
|
Density |
Melting Point |
Minimum Mechanical Properties at Room Temperature |
||
|
Tensile Strength |
Yield Strength |
Elongation |
||
|
g/cm3 |
℃ |
Rm N/mm2 |
Rp0.2 N/mm2 |
A5% |
|
8 |
1375~1425 |
515 |
205 |
40% |
Feature
Specially optimized for high-temperature service conditions, this material significantly enhances elevated-temperature strength and creep resistance through controlled carbon content, while maintaining the fundamental corrosion resistance of the 316 series.
Applications
Energy & Thermal Systems: Supercritical boiler tubes, cracking furnace tubes (long-term service below 800°C).
Petrochemical Equipment: High-temperature/pressure reactors, hydrogenation unit components.
Special Load-Bearing Parts: Aircraft engine fasteners, hot-working molds.
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