316H stainless steel is a higher carbon version of 316 type, it is a variant of 316, 316H has between 0.04 and 0.1% carbon content making it suitable for use in elevated temperatures applications, the expanded carbon content gives greater tensile and yield strength, 316H possesses the Austenitic structure enable to obtain excellent toughness, even down to low temperatures.
Chemical Composition
The chemical composition of stainless steel 316H is generally composed of 16 to 18% chromium, 10 to 14% nickel, 2 to 3% molybdenum, and a percentage of 0.04 to 0.10% carbon, improving its thermal stability and creep resistance. However, due to the high carbon content, it is prone to sensitization which makes welding joints vulnerable to corrosion.
| Grade | C | Si | Mn | P | S | Cr | Mo | Ni |
|---|---|---|---|---|---|---|---|---|
| 316H | 0.04 – 0.10 | 0.75 | 2.00 | 0.045 | 0.030 | 16.00 – 18.00 | 2.00 – 3.00 | 10.00 – 14.00 |
Mechanical Properties
| Grade | Proof Stress 0.2% (MPa) | Tensile Strength (MPa) | Elongation A5(%) | Hardness Max HB | Hardness Max HRB |
|---|---|---|---|---|---|
| 316H | 205 | 515 | 40 | 217 | 95 |
316H Stainless Steel Characteristics
- Higher carbon content
- Greater tensile yield strength
- Applied in high temperatures
- Maybe fragile to carbide precipitation when welding
- Greater short and long-term creep strength
Difference Between Stainless Steel 316, 316L, 316H, 316Ti
316 is a basic molybdenum-based grade, 316L, 316H, and 316Ti are variant grades, and they all belong to Austenitic stainless steel.
Stainless Steel Grade 316L is a low-carbon variant of 316 and has similar properties to 316 type and better resistance to intergranular corrosion.
Stainless Steel 316Ti is Titanium addition of 316 steel, the added Titanium increases corrosion resistance, enhances resistance to pitting chloride ion solutions, and gives expanded strength at high temperatures, 316H can be also used in high temperatures, but it is vulnerable, 316Ti may can avoid that situation.
Their chemical composition and mechanical properties are also different shown below.
| Grade | C (Max) | Si (Max) | P (Max) | S (Max) | Mn (Max) | Cr | Ni | Mo |
|---|---|---|---|---|---|---|---|---|
| 316 | 0.08 | 0.75 | 0.045 | 0.030 | 2.0 | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 |
| 316L | 0.03 | 0.75 | 0.045 | 0.030 | 2.0 | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 |
| 316H | 0.04-0.10 | 0.75 | 0.045 | 0.030 | 2.0 | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 |
| 316Ti | 0.08 | 1.0 | 0.040 | 0.030 | 2.0 | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 |
| Grade | Tensile Strength (Ksi) | 0.2% Yield Strength (Ksi) | Elongation% In 2 Inches |
|---|---|---|---|
| 316 / 316H / 316Ti | 75 | 30 | 40 |
| 316L | 70 | 25 | 40 |
Forms Available
- Tube
- Pipe
- Fittings
- Flanges
- Special Sections
- Sheet
- Plate
- Flat Bar
- Round Bar
- Hollow Bar