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Stainless Steel 316

Material: AISI 316, UNS S31600, 1.4401/1.4436
316 stainless steel is created by adding molybdenum and nickel to 304 stainless steel, and belongs to the austenitic stainless steel series. 316 steel has a high temperature resistance of 1200-1300 degrees due to the addition of M0 element. Due to its excellent performance, 316 stainless steel pipes are widely used in medical device manufacturing, pharmaceutical and food industries, chemical industries and other fields.
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What Is 316 Stainless Steel?

316 stainless steel is an austenitic stainless steel, the main components are chromium and nickel, and 2% molybdenum is added. The role of molybdenum is to enhance the corrosion resistance of stainless steel. Therefore, 316 stainless steel has better resistance to corrosive media such as seawater and salt water than 304 stainless steel. 316 steel is also known as SS316.


316 stainless steel contains about 2-3% molybdenum and other alloy elements. It is an upgraded product of 304 stainless steel. Ni, Cr, and MO elements are added to 304 stainless steel. It has a higher density than 304 and has better performance.


Stainless Steel 316, also called UNS S31600, is an austenitic chromium-nickel-molybdenum stainless steel, 1.4436 is a higher version of 1.4401, 1.4436 is a higher alloy of 1.4401. AISI 316 has very good stability against chloric media and non-oxidizing acids than ss 304,  it is usally called marine grade stainless steel.


316 Stainless Steel Composition

Grade

C≤

Mn≤

P≤

S≤

Si≤

Cr

Ni

Mo

N≤

316

0.08

2.0

0.045

0.03

0.75

16.0-18.0

10.0-14.0

2.0-3.0

0.1


SS316 Mechanical Properties

Grade

Tensile, min, ksi[MPa]

Yield, min, ksi[MPa]

Elongation, %(min)

Hardness, HB(max)

316

75【515】

30【205】

40

192


Stainless Steel 316 World Similar Equivalent Grades

STANDARD

WERKSTOFF NR.

UNS

JIS

BS

AFNOR

EN

316

1.4401/1.4436

S31600

SUS316

316S31  / 316S33

Z7CND17‐11‐02

X5CrNiMo17-12-2/X3CrNiMo17-13-3


316 Stainless Steel Properties

  • Corrosion Resistance: Excellent resistance to a wide range of chemicals and environments, significantly better than 304/304L, especially in dilute sulfuric, acetic, phosphoric, and formic acids.

  • Stress Corrosion Cracking: Susceptible to chloride-induced SCC at temperatures above approximately 60°C / 140°F. Not recommended for sustained stress in hot chloride environments.

  • Weldability: Excellent using all standard fusion methods TIG, MIG, SMAW, SAW. 316L is strongly preferred for welded fabrication to prevent sensitization. Post-weld annealing may be needed for maximum corrosion resistance in harsh service.

  • Formability: Easily deep drawn, stretch formed, spun, and bent. Higher strength and work hardening rate than carbon steel require more powerful equipment.

  • Magnetism: Essentially non-magnetic in the annealed state. It can become slightly magnetic due to cold working.


Steel 316 ASTM  Product

Product

Standard

Show

Pipe SMLS & Welded

ASTM A312

316 Stainless Steel Pipe SMLS and Welded

Tube SMLS & Welded

ASTM A269/213

316 Stainless Steel Tube SMLS and Welded

Sheet/Plate

ASTM A240

316 Stainless Steel Sheet Plates

Bar /Rod

ASTM A276/A479

316 Stainless Steel Bars And Rods

Forging /Flange

ASTM A182

316 Stainless Steel Forging And Flanges

BW Fittings

ASTM A403

316 Stainless Steel BW Fittings


Stainless steel 316 Application


  • Chemical and petrochemical processing

  • Food and beverage processing

  • Pharmaceutical and biotechnology industries

  • Water treatment plants and marine

  • Offshore applications


FAQs

Is 316 stainless steel magnetic?
Usually, NO. It is mostly non-magnetic. After cutting or bending, it might show slight magnetism.


What is the difference between 304 and 316 stainless steel?

  1. 316 has molybdenum (about 2-3%). 304 does not.

  2. 316 fights rust better, especially near salt or chemicals (like near the ocean).

  3. 304 costs less and works well for everyday items.


Does 316 stainless steel rust?
It resists rust very well, but it is not rust-proof.

  • It handles air and fresh water very well.

  • Long contact with salt, strong acids, or pollution can cause rust.

  • Regular cleaning helps prevent rust.


Is 316 stainless steel food grade?
Yes.

  • It is widely used for kitchen tools, food equipment, and food surfaces.

  • It resists corrosion and cleans easily.

  • It meets food safety rules (like FDA standards).

  • A product must also be made correctly to be truly "food grade".


About 316 Stainless Steel Standards

ASTM A240 pdf review

ASTM A276 pdf review

ASTM A479 pdf review


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