AISI 310/310S Stainless Steel Composition,Properties

What is AISI 310 Stainless Steel (UNS S31000)?

AISI 310 stainless steel is a high chromium nickel austenitic stainless steel with a high carbon content. It has excellent mechanical properties, high temperature oxidation resistance and heat resistance.

Type 310S is a low carbon version of SS 310, 310H is to obtain the best creep strength and creep rupture strength. 310Cb is added with niobium to maximize the stability of carbides, prevent sensitization, and improve weldability and high temperature creep strength.

 

 

 

1.Grade 310/310S stainless steel is a high-chromium, high-nickel austenitic alloy. Grade 310 has a maximum carbon content of 0.25%, while 310S is a low-carbon variant (with a maximum carbon content of 0.08%), designed specifically for high-temperature environments. Both types of stainless steel exhibit excellent oxidation resistance, maintaining structural stability even at continuous operating temperatures up to 1095°C (2000°F) and short-term exposure to temperatures as high as 1150°C (2100°F), making them ideal for applications such as furnace components, heat exchangers, and industrial ovens. However, their resistance to chloride-induced pitting is weaker compared to molybdenum-containing grades like 316.

 

2.In terms of mechanical properties, they offer high tensile strength (minimum 515 MPa) and good ductility. Due to its lower carbon content, 310S boasts excellent weldability and resistance to sensitization during welding, thereby reducing the risk of intergranular corrosion.

 

310 Stainless Steel Chemical Composition

Type 310 Stainless Steel Chemical Composition, %
ASTM Standard	AISI (UNS)	C, ≤	Si, ≤	Mn, ≤	P, ≤	S, ≤	Cr	Ni	Other Elements
ASTM A240/A240M; ASTM A276/A276M; ASTM A314; ASTM A167; ASTM A479/A479M ASTM A580/A580M; ASTM A473; ASTM A959 SAE J405;	310 (UNS S31000)	0.25	1.50	2.00	0.045	0.03	24.0-26.0	19.0-22.0	–
	310S (UNS S31008)	0.08	1.50	2.00	0.045	0.03	24.0-26.0	19.0-22.0	–
	310H (UNS S31009)	0.04-0.10	0.75 (1.00)	2.00	0.045	0.03	24.0-26.0	19.0-22.0	–
	310Cb (UNS S31040)	0.08	1.5	2.00	0.045	0.03	24.0-26.0	19.0-22.0	Nb, 10×C-1.10
	310HCb (UNS S31041)	0.04-0.10	0.75	2.00	0.045	0.03	24.0-26.0	19.0-22.0	Nb, 10×C-1.10

 

AISI 310 Grade Stainless Steel Mechanical Properties

ASTM A240 Type 310  plate Mechanical Properties
ASTM	AISI (UNS)	Tensile Strength, Mpa (ksi), ≥	0.2% Yield Strength, Mpa (ksi), ≥	Elongation in 2 in. (50 mm), %, ≥	Brinell Hardness, HB, ≤	Rockwell Hardness, HRB, ≤
ASTM A240/A240M	310S, 310H, 310Cb, 310HCb	515 (75)	205 (30)	40	217	95

ASTM A276 Type 310 bar Mechanical Properties
ASTM	AISI	Tensile Strength, Mpa (ksi), ≥	0.2% Yield Strength, Mpa (ksi), ≥	Elongation in 2 in. (50 mm), %, ≥	Reduction of Area, %, ≥	Conditions
ASTM A276/A276M	310, 310S, 310Cb	515 (75)	205 (30)	40	50	Annealed, Hot finished, All dia.
		620 (90)	310 (45)	30	40	Annealed, Cold finished, Dia ≤ 1/2 in (12.7mm)
		515 (75)	205 (30)	30	40	Annealed, Cold finished, Dia > 1/2 in (12.7mm)

Type 310 Stainless Steel Heat Resistance

Maximum service temperatures in air
AISI type	Intermittent service	Continuous service
310	1035 °C (1895 °F)	1150 °C (2100 °F)

 

What is the difference between AISI 310 and 310S?
310 plate contains no more than 0.25% carbon, while 310S contains at most 0.08% carbon. 310H stainless steel is comprised of between 0.04% and 0.1% carbon. 310, 310S, and 310H stainless steel plates all contain 2.0% manganese, 0.045% phosphorous, and 0.30% sulfur.

 

What is the difference between 310 and 316L stainless steel?
Compared to 316L, 310S stainless steel has better corrosion resistance in salt water because it contains more chromium and nickel. The corrosion layer thickness for 310S and 316L is 1.613μm and 2.903μm, respectively, equivalent to 0.499μm/year and 1.460μm/year.