Specs: 310S(1.4845)Cr-Ni

Alloy 310/310S (UNS S31000/S31008) austenitic stainless steel pipe is typically used for elevated temperature applications. Its high chromium and nickel content provides comparable corrosion resistance, superior resistance to oxidation, and the retention of a larger fraction of room temperature strength than the common austenitic Alloy 304.

General Properties
Chemical Composition
Aqueous Corrosion Resistance
Physical Properties
Typical Short-Term Mechanical Properties
Elevated Temperature Oxidation Resistance
Heat Treatment
Fabrication Characteristics
Application
Welding
Other Forms of Degradation

310 Stainless Steel Tube | 310 Stainless Steel Pipe
304 | 304L | 304H| 316/316L| 316Ti| 317L| 321/321H | 309S | 310S | 347/347H| S32205/S31803| S32750| 904L

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Physical Properties of 310S/310H Alloys in the Annealed Condition

			Tensile Strength			Yield Strength
Alloy	UNS Designation	Spec.	psi	MPa	ksi	psi	MPa	ksi	Elongation in 2 inches (min.) %	Grain Size Req.	Maximum Hardness	Modulus of Elasticity (x106 psi)	Mean Coefficient of Thermal Expansion (IN./IN./°F x 10-6)	Thermal Conductivity(BTU-in/ft2-h-°F)
310S	S31008	A249, A312	75,000	515	75	30,000	205	30	35	—	90 Rb	29.0	9.2	116
310H	S31009	A249, A312	75,000	515	75	30,000	205	30	35	6 or coarser	90 Rb	29.0	9.2	116

Composition of 310S/310H stainless steel pipe

Grade	310S	310H
UNS Designation	S31008	S31009
Carbon (C) Max.	0.08	0.04– 0.10
Manganese (Mn) Max.	2.00	2.00
Phosphorous (P) Max.	0.045	0.045
Sulphur (S) Max.	0.030	0.030
Silicon (Si) Max.	1.00	1.00
Chromium (Cr)	24.0–26.0	24.0–26.0
Nickel (Ni)	19.0–22.0	19.0–22.0
Molybdenum (Mo)	—	—
Nitrogen (N)	—	—
Iron (Fe)	Bal.	Bal.
Other Elements	—	—

310S/310H Product Range

Alloy	UNS Designation	Werkstoff NR.	Specifications*
310S	S31008	1.4845	A/SA249, A/SA312
310H	S31009	—	A/SA249, A/SA312

*Note: The specifications noted including ASTM, ASME, or other applicable authorities are correct at the time of publication. Other specifications may apply for use of these materials in different applications.

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Principal Design Features  The strength of this alloy is a combination of good strength and corrosion resistance in temperatures up to 2100^oF (1149^oC). Due to its relatively high chromium and nickel content it is superior in most environments to 304 or 309 stainless. 

Applications  Oven linings, boiler baffles, kilns, lead pots, radiant tubes, annealing covers, saggers, burners, combustion tubes, refractory anchor bolts, fire box sheets, furnace components and other high temperature containers. 

Machinability  This alloy machines similarly to type 304 stainless. Its chips are stringy and it will work harden rapidly. It is necessary to keep the tool cutting at all times and use chip breakers. 

Welding  Most of the austenitic stainless steels can be readily welded using fusion or resistance methods. Oxyacetylene welding is not recommended. Filler metal should be AWS E/ER 310. 

Hot Working  Most common hot work methods can be successfully performed after uniform heating to 2150 F (1177 C). Do not forge below 1800 F (982 C). Rapid cooling is required to maximize corrosion resistance. 

Cold Working  Although this alloy has a high work hardening rate, it can be drawn, headed, upset, and stamped. Full annealing is required after cold work to remove internal stress. 

Annealing  1900-2050 F (1038-1121 C) water quench. 

Principal Design Features  The strength of this alloy is a combination of good strength and corrosion resistance in temperatures up to 2100 F (1149 C). Due to its relatively high chromium and nickel content it is superior in most environments to 304 or 309 stainless. 

Hardening  This alloy does not respond to heat treatment. Cold work will cause an increase in both hardness and strength.