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Stainless Steel 316L

Material: 316L, UNS S31603, 1.4404, 1.4435

316L stainless steel is a low carbon austenitic chromium-nickel-molybdenum stainless steel. 1.4435 is used as a medical grade stainless steel due to its excellent resistance to various corrosions. It is a highly alloyed variant of 1.4404. AISI 316L is more resistant to carbide precipitation and has good oxidation resistance at temperatures up to 870°C in intermittent operation and up to 925°C in continuous operation.

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Stainless Steel 316L Introduction:

316L is a variant of 316 stainless steel, belonging to low carbon austenitic chromium-nickel-molybdenum stainless steel. The main difference is that the carbon content is lower, usually not more than 0.03%, reducing the risk of intergranular corrosion during welding. Due to the reduced carbon content, 316L can still maintain good corrosion resistance after welding. In addition, 316L shows better corrosion resistance after heat treatment.

SAE 316L grade stainless steel, also known as A4 stainless steel or marine grade stainless steel, is the second most common austenitic stainless steel after 304/A2 stainless steel. Since 316L has a lower carbon content than 316, it has better resistance to intergranular corrosion and is the best choice for high corrosion and high temperature applications.

316L Stainless steel Chemical Composition

Grade	C≤	Mn≤	P≤	S≤	Si≤	Cr	Mo	N≤	Ni
316L	0.03	2.0	0.045	0.03	0.75	16.0-18.0	2.00-3.00	0.1	10.0-14.0

Stainless Steel 316L Mechanical Properties

316L Tensile Strength: 485MPa
316L Yield Strength: 170MPa
316L Elongation: 40%
316L Hardness: 217HB

316L Physical Properties

Density: 7.98 g/cm³

Melting point range: 1375~1450 ℃

Resistivity: 73-74 μΩ·cm

Specific heat capacity: 0.502 J/(g·K) (20℃)2 / 0.45 J/(g·K)

Elastic modulus: 193 GPa

Thermal Properties

Properties	Value
Average thermal expansion coefficient	15.9 μm/m·℃ (0-100℃)
	16.2 μm/m·℃ (0-315℃)
	17.5 μm/m·℃ (0-538℃)
Thermal conductivity	16.3 W/m·K (100℃)
Thermal conductivity	21.5 W/m·K (500℃)
Thermal conductivity (W/(m·K))	15.1 (100℃) / 18.4 (300℃) / 20.9 (500℃)

Stainless Steel 316L Equivalent Grades

WERKSTOFF NR.: 1.4404 / 1.4435
UNS: S31603
JIS: SUS316L
BS: 316S11 / 316S13
GOST: 03Ch17N14M3 / 03Ch17N14M2
AFNOR: Z3CND17-11-02 / Z3CND18-14-03
EN: X2CrNiMo17-12-2 / X2CrNiMo18-14-3

316L Stainless Steel Standard And Products

Products	Standard	Show
316L SMLS and Welded Pipe	ASTM A312
316L SMLS and Welded Tube	ASTM A269/ASTM A213
316L Sheet And Plate	ASTM A240
316L Bars/Rods	ASTM A276/A479
316L Forging/Flanges	ASTM A182
316L BW Fittings	ASTM A403