: : Stainless Steel 316 316L & 316H Alloy

Stainless Steel Grade 316 is the standard molybdenum-bearing grade, second in importance to 304 amongst the austenitic stainless steels. The molybdenum gives 316 better overall corrosion resistant properties than Grade 304, particularly higher resistance to pitting and crevice corrosion in chloride environments. Stainless Steel 316 has excellent forming and welding characteristics. It is readily brake or roll formed into a variety of parts for applications in the industrial, architectural, and transportation fields. Stainless Steel Grade 316 also has outstanding welding characteristics. Post-weld annealing is not required when welding thin sections.

Stainless Steel Grade 316L, the low carbon version of Stainless Steel 316 and is immune from sensitisation (grain boundary carbide precipitation). Thus it is extensively used in heavy gauge welded components (over about 6mm). Stainless Steel Grade 316H, with its higher carbon content has application at elevated temperatures, as does stabilised Stainless Steel grade 316Ti.

The austenitic structure also gives these grades excellent toughness, even down to cryogenic temperatures.

     
Typical compositional ranges for Stainless Steel grade 316 stainless steel are given in the table below.
Grade
C
Mn
Si
P
S
Cr
Mo
Ni
N
316
min
-
-
-
0
-
16.0
2.00
10.0
-
max
0.08
2.0
0.75
.045
.03
18.0
3.00
14.0
0.10
316L
min
-
-
-
-
-
16.0
2.00
10.0
-
max
0.03
2.0
0.75
.045
.03
18.0
3.00
14.0
0.10
316H
min
0.04
0.04
0
-
-
16.0
2.00
10.0
-
max
0.10
0.10
0.75
045
.03
18.0
3.00
14.0
-

Typical mechanical properties for Stainless Steel grade 316 stainless steel are given in the table below.
Grade
Tensile Strength (MPa) min
Yield Strength 0.2% Proof (MPa) min
Elongation (% in 50mm) min
Rockwell B (HR B) max
Brinell (HB) max
316
515
205
40
95
217
316L
485
170
40
95
217
316H
515
205
40
95
217

Stainless Steel 316 Applications


Typical application include:
  • Laboratory benches & equipment.
  • Coastal architectural panelling, railings & trim
  • Boat fittings
  • Heat Exchangers
  • Woven or welded screens for mining, quarrying & water filtration
  • Threaded fasteners
  • Springs
  • Chemical containers, including for transport.

Stainless Steel 316 Physical Properties


Density: 8,000 kg / m3
Elastic Modulus: 193 GPa
Specific Heat: 500 J/kg.K

Stainless Steel 316 Corrosion Resistance

Excellent in a range of atmospheric environments and many corrosive media - generally more resistant than 304. Subject to pitting and crevice corrosion in warm chloride environments, and to stress corrosion cracking above about 60°C. Considered resistant to potable water with up to about 1000mg/L chlorides at ambient temperatures, reducing to about 500mg/L at 60°C.

Stainless Steel 316 is usually regarded as the standard “marine grade stainless steel”, but it is not resistant to warm sea water. In many marine environments 316 does exhibit surface corrosion, usually visible as brown staining. This is particularly associated with crevices and rough surface finish.

Stainless Steel 316 Heat Resistance

Good oxidation resistance in intermittent service to 870°C and in continuous service to 925°C. Continuous use of 316 in the 425-860°C range is not recommended if subsequent aqueous corrosion resistance is important. Grade 316L is more resistant to carbide precipitation and can be used in the above temperature range. Grade 316H has higher strength at elevated temperatures and is sometimes used for structural and pressure-containing applications at temperatures above about 500°C.

Stainless Steel Tensile Strength Chart Stainless Steel Feet per Pound Chart
Stainless Steel Spool Specifications Insulated Stainless Steel
Stainless Steel Resistance Data

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