Alloy 316H (UNS S31609) is a high carbon modification of Alloy 316 developed for use in elevated temperature service. The alloy has higher strength at elevated temperatures and is used for structural and pressure vessel applications at temperatures above 932°F (500°C). The higher carbon content of 316H also delivers higher tensile and yield strength than 316/316L and its austenitic structure provides excellent toughness down to cryogenic temperatures.

The corrosion resistance of Alloy 316H is comparable to Alloy316/316L and is superior to Alloy 304/304L in moderately corrosive environments. It is often used in process streams containing chlorides or halides. The alloy resists atmospheric corrosion, as well as, moderately oxidizing and reducing environments. It also resists corrosion in polluted marine conditions.

Alloy 316H is non-magnetic in the annealed condition. It cannot be hardened by heat treatment, however the material will harden due to cold working. It can be easily welded and processed by standard shop fabrication practices.

STANDARDS
INDUSTEEL TRADEMARKS		UNS	ASTM	EURONORMS EN	SUS
316H		S31609	316H	1.4919	SUS 316

Chemical Composition:

Grade		C	Mn	Si	P	S	Cr	Mo	Ni	N
316 H	min. max.	0.04 0.10	– 2.0	– 0.75	– 0.045	– 0.03	16.0 18.0	2.00 3.00	10.0 14.0	0.1

Mechanical Properties

Grade	Tensile Strength (MPa) min	Yield Strength 0.2% Proof (MPa) min	Elongation (% in 50mm) min	Hardness
				Rockwell B (HR B) max	Brinell (HB) max
316 H	515	205	40	95	217

Physical Properties

Grade	Density (kg/m3)	Elastic Modulus (GPa)	Mean Coefficient of Thermal Expansion (μm/m/°C)			Thermal Conductivity (W/m.K)		Specific Heat 0-100°C (J/kg.K)	Electrical Resistivity (nΩ.m)
			0-100°C	0-315°C	0-538°C	at 100°C	at 500°C
316 H	8000	193	15.9	16.2	17.5	16.3	21.5	500	740

Product details:

APPLICATIONS
CHEMICAL INDUSTRIES			PROCESS INDUSTRIES			WATER TREATMENT			STORAGE & TRANSPORTATION
Nitric Acid	Sulfuric Acid	Polymer& otheracids	Fertilisers	Pulp& Paper	Hydrome-tallurgy	Seawater& desalination	Freshwater &Tanks	Waste Water	Chemical Tanks	Cryogenic Tanks	Renewable

POWER GENERATION				OIL & GAS			CONSTRUCTION
Nuclear	Pollution control	Hydroelectric	Renewable	Off & Onshore & production	Refining & Gas processing	Petrochemical	Architecture	Bridges

For more technical details :
(1) Indicative typical values
(2) Indicative typical values for thickness 20 mm at RT for transverse direction
(3) Hardening 496°C (925°F), 4h, air cooling
(4) PREN = Cr + 3.3 Mo + 16N
(5) PRENW = Cr + 3.3(Mo + 0.5W) + 16N
(6) HT: mechanical properties depend on heat treatment