1

Corrosion resistance

(1) Stainless steel 316L 2%~3% molybdenum, which has good resistance to chloride ion corrosion and is suitable for seawater environment.

(2) When stainless steel 316L is exposed to air or in contact with oxygen-containing media (such as water), a passivation film will naturally form on its surface. It can remain stable, thus providing better corrosion resistance.

2

Good Mechanical Properties

(1) Elongation ≥30%, suitable for complex forming processes.

(2) Low yield strength, easy to process.

(3) stainless steel 316L has high tensile strength ≥485 MPa and yield strength ≥170 MPa.

3

Pressure Adaptability

Stainless Steel 316L valves can withstand the pressure resistance requirements of various pipelines such as low pressure, medium pressure, high pressure and ultra-high pressure on ships.

Conventional applications: Low pressure system (≤PN16/Class 150): 1.6 MPa; medium and high pressure system (PN40/Class 300): 4.0~5.0 MPa; forged steel 316L valves can reach PN100/Class 600 (above 10.0 MPa).

4

Temperature Adaptability

Stainless steel 316L valves can withstand ultra-low temperature, normal temperature, medium temperature and high temperature working temperature, usually suitable for the range of -200°C to 500°C, suitable for steam, oil, cold water, hot water and other media (note that it is not suitable for the medium concentrated sulfuric acid).

5

Environment Adaptability

Stainless steel 316L has good corrosion resistance and resistance to stress corrosion cracking, and is suitable for marine environments and humid environments.

4

Welding Performance

Stainless steel 316L has good welding performance. Welders can use arc welding, argon arc welding, etc., and no annealing treatment is required after welding, which reduces manufacturing and maintenance costs.

6

Widely Used in the Marine Field

Stainless steel 316L is widely used in shipbuilding for hulls, superstructures, cooling and fuel piping systems, deck equipment, ventilation equipment, etc. Its corrosion resistance and reliability have been verified by long-term practice.

7

Cost

Compared with brass, stainless steel 316L has moderate cost.

UNS

S31603

Standard

ASTM A959-2004

Standard Guide for Specifying Harmonized Standard Grade Compositions for Wrought Stainless Steels

Classification

Austenitic stainless steel

Performance

Strength/corrosion resistance/ low temperature toughness/ forging weldability

Description

316L stainless steel is commonly used in heat exchangers for pulp and papermaking equipment, dyeing equipment, film washing equipment, pipelines, materials for the exterior of buildings in coastal areas, and bracelets and cases of high-end watches. Equipment for use in seawater, production equipment for chemicals, dyes, papermaking, oxalic acid, fertilizers, etc.; photography, food industry, coastal facilities, ropes, CD rods, bolts, nuts.

316L is a molybdenum-containing stainless steel. Due to the molybdenum content in the steel, the overall performance of this steel is better than that of 310 and 304 stainless steel. Under high temperature conditions, when the concentration of sulfuric acid is lower than 15% or higher than 85%, 316L stainless steel has a wide range of uses. 316L stainless steel also has good resistance to chloride erosion, so it is usually used in marine environments.

The maximum carbon content of 316L stainless steel is 0.03, which can be used in applications where annealing cannot be performed after welding and maximum corrosion resistance is required.

316L stainless steel has good oxidation resistance in intermittent use below 1600 degrees and continuous use below 700 degrees. It is best not to continuously work in the range of 800-1575 degrees. 316L stainless steel, but when 316L stainless steel is used continuously outside this temperature range, the stainless steel has good heat resistance. 316L stainless steel has better resistance to carbide precipitation than 316 stainless steel, and the above temperature range can be used.

Solution annealing is carried out in the temperature range of 1010-1150 degrees, and then rapidly cooled. 316L stainless steel cannot be hardened by overheating.

316L stainless steel has good welding performance. It can be welded by all standard welding methods. When welding, 316Cb, 316L or 309Cb stainless steel filler rods or electrodes can be used for welding according to the purpose. For the best corrosion resistance, the welded section of 316 stainless steel needs to be annealed after welding. If 316L stainless steel is used, post-weld annealing is not required.

Tensile strength (Mpa) 485 MIN Yield strength (Mpa) 170 MIN Elongation (%) 30 MIN Area reduction (%) 40 MIN The density of 316L stainless steel is 7.93 g/cm3. The hardness is HRB<90 HV<200 HBS<187

Maximum value

-

-

-

-

-

16

10

2

Minimum value

0.13

1

2

0.045

0.03

18

14

3