Alloy 310S

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An austenitic chromium-nickel grade, Alloy 310S (1.4845) displays excellent oxidation resistance up to 1094°C

Alloy 310S (1.4845) displays excellent resistance to oxidation under mildly cyclic conditions. As a result of its high chromium and nickel content, Alloy 310S has good resistance to sulphidation and other forms of hot corrosion.

Inventory

Product forms	Size range from	Size range to
Alloy 310S pipe	0.5 in	4 in	GET A QUOTE
Alloy 310S round bar	8 mm	57.15 mm	GET A QUOTE
Alloy 310S sheet & plate	1.2 mm	50.8 mm	GET A QUOTE

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Pipe

Round Bar

Sheet & Plate

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Chemical Analysis

%	Cr	Ni	C	Si	Mn	P	S	Mo	Cu	Fe
Min	24	19	-	-	-	-	-	-	-	-
Max	26	22	0.08	0.75	2	0.045	0.03	0.75	0.5	Balance

Applications

Perfect for applications in the Thermal Processing industry

Alloy 310S can be used in a variety of applications, here are just a few examples:

Flare tips
Fluidized bed coal combustors
Radiant tubes
Tube hangers for petroleum refining and steam boilers
Coal gasifier internal components
Thermowells and refractory anchor bolts
Burners, combustion chambers
Retorts, muffles, annealing covers
Cryogenic structures

About Alloy 310S

Alloy 310S is widely used in moderately carburizing atmospheres such as those encountered in petrochemical environments. The more severely carburizing atmospheres of industrial heat treating furnaces require RA330® or RA333®. Alloy 310S is not suggested for the severe thermal shock of repeated liquid quenching.

The grain size and carbon content meets both 310S and 310H requirements. Alloy 310S is often used at cryogenic temperatures, with excellent toughness and low magnetic permeability. Alloy 310S has good machinability and is readily fabricated.

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Properties

Density:: 7.86 g/cm³
Melting range:: 1354 – 1401.7 °C

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Mechanical & Physical Properties

Mechanical & Physical Properties	21.1 °C	537.8 °C	648.9 °C	760 °C	871.1 °C	982 °C	1093 °C
Ultimate Tensile Strength/ MPa	551.6	467.5	373	242	131.7	-	-
0.2% Yield Strength/ MPa	241.3	143.4	142.7	133.1	84.1	-	-
Elongation %	52	47	43	46	48	-	-
Minimum Creep 0.0001% per hr/ MPa	-	-	102.7	22.8	7.6	1.9	-
10,000 hr Rupture Strength / MPa	-	-	99.3	31	10.3	4.6	-
Coefficient of Thermal Expansion µm/m⁰C	-	17.1	17.6	18.1	18.3	18.5	19.1
Thermal Conductivity/kcal/(hr.m.°C)	11.3	20.2	22.6	25	27.4	29.8	-
Modulus of Elasticity/ x10⁵ MPa	2	1.59	1.5	1.41	1.32	-	-

Mechanical & Physical Properties

Mechanical & Physical Properties	21.1 °C	537.8 °C	648.9 °C	760 °C	871.1 °C	982 °C	1093 °C
Ultimate Tensile Strength/ MPa	551.6	467.5	373	242	131.7	-	-
0.2% Yield Strength/ MPa	241.3	143.4	142.7	133.1	84.1	-	-
Elongation %	52	47	43	46	48	-	-
Minimum Creep 0.0001% per hr/ MPa	-	-	102.7	22.8	7.6	1.9	-
10,000 hr Rupture Strength / MPa	-	-	99.3	31	10.3	4.6	-
Coefficient of Thermal Expansion µm/m⁰C	-	17.1	17.6	18.1	18.3	18.5	19.1
Thermal Conductivity/kcal/(hr.m.°C)	11.3	20.2	22.6	25	27.4	29.8	-
Modulus of Elasticity/ x10⁵ MPa	2	1.59	1.5	1.41	1.32	-	-

Specifications

UNS Number:: S31008, S31009
W.Nr.Number:: 1.4845
Standards:: ASTM A240, A276, A312, A479, AMS 5521, 5651

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FAQs & Resources

What is stainless steel?

Stainless steel is the generic name of different grades of steels (containing low carbon and iron), used primarily because of their corrosion resistance. All stainless steels share a minimum percentage of 10.5% chromium element. Chromium (Cr), usually a deciding factor, nickel and molybdenum are commonly added to steels to improve their corrosion resistant and make them ‘stainless’. Most of the stainless steel grades will have a UNS number that start off with letter ‘S’ such as UNS S32100 (Alloy 321) and UNS S31008/S31009 (Alloy 310/310S).

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