Where is 316L preferred over 316?

In welded structures, especially for thick sections and applications requiring long-term corrosion resistance.

Is 316L weaker than 316?

Its tensile strength is slightly lower, but its c orrosion resistance in welded conditions is superior.

What is the main difference between 316 and 316L?

316L has lower carbon, which reduces the risk of carbide precipitation and improves weldability.

Stainless Steel 316L

Material Type：Metal
Material Name：Stainless Steel 316L
Alternative Names：UNS S31603 | EN 1.4404 | ASTM A240
Process Compatibility：CNC Milling, CNC Turning, Welding, Forming

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Description

316L is the low-carbon version of Stainless Steel 316. With a maximum carbon content of 0.03%, it minimizes carbide precipitation during welding, making it more resistant to intergranular corrosion. It retains the same superior resistance to chlorides and harsh chemicals as 316, while being especially useful for heavy-welded structures in marine and chemical industries.

Lead Time:	< 10 days
Wall Thickness:	0.75 mm
Tolerances:	±0.005″ (±0.125mm)
Max Part Size:	200 cm x 80 cm x 100 cm

Classification of Metal Performance Parameters

Mechanical Properties	Ultimate Tensile Strength	485
	Yield Strength	170
	Young’s Modulus / Elasticity	200
	Elongation at Break	40
	Hardness	HB 150
	Fatigue Strength	170
Physical Properties	Density	8
	Corrosion Resistance	Excellent
	Magnetism	Non-magnetic
	Weldability	Good
	Impact Toughness	High
Thermal Properties	Maximum Service Temperature	870
	Thermal Expansion Coefficient	16
	Thermal Conductivity	16.2
	Creep Resistance	Moderate
Electrical Properties	Electrical Resistivity	74
	Electrical Conductivity	2.5
	Dielectric Strength	N/A
Processing & Surface Treatment	Machinability	Fair
	Surface Finish Compatibility	Good
	Formability	Good
Special Properties	Biocompatibility	Yes
	Flame Retardancy	Yes
	UV Resistance	High
	Recyclability	Yes

Introduction to Stainless Steel 316L

What

Stainless Steel 316L (UNS S31603) is a molybdenum-bearing austenitic stainless steel with reduced carbon content compared to 316. The low carbon improves its weldability and resistance to sensitization, especially in thick welded sections where post-weld heat treatment is impractical. It maintains excellent resistance to pitting, crevice corrosion, and chlorides, making it highly reliable for long-term service in aggressive environments such as seawater and chemical plants.

Advantages

Better resistance to intergranular corrosion after welding compared to 316
Excellent chloride corrosion resistance
Good strength, ductility, and formability
Suitable for hygienic and medical-grade applications

Applications

Marine equipment and coastal structures
Chemical and pharmaceutical processing equipment
Medical implants and surgical tools
Storage tanks for aggressive chemicals

FAQ

Q Where is 316L preferred over 316?

A
In welded structures, especially for thick sections and applications requiring long-term corrosion resistance.
Q Is 316L weaker than 316?

A
Its tensile strength is slightly lower, but its c orrosion resistance in welded conditions is superior.
Q What is the main difference between 316 and 316L?

A
316L has lower carbon, which reduces the risk of carbide precipitation and improves weldability.

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Stainless Steel 316L

Introduction to Stainless Steel 316L

FAQ

Q Where is 316L preferred over 316?

Q Is 316L weaker than 316?

Q What is the main difference between 316 and 316L?

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