316 Stainless Steel Seamless Pipes & Tubes

Stainless Steel 316 is the standard molybdenum-bearing grade, second in importance to SS 304 amongst the austenitic stainless steels. The molybdenum gives SS 316 better overall corrosion resistant properties than Stainless Steel 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. SS 316 also has outstanding welding characteristics. Post-weld annealing is not required when welding thin sections. SS 316L, the low carbon version of SS 316 and is immune from sensitisation (grain boundary carbide precipitation).SS 316H, with its higher carbon content has application at elevated temperatures, same as SS 316Ti which is a Titanium stabilised grade .SS 316N is nitrogen enhanced with greater strength than SS 316.
316 Stainless Steel Pipes and Tubes
Product Range
316 Stainless Steel Pipes and Tubes
Specifications:
ASTM A/ASME SA213/A249/A269/A312/A358 CL. I to V ASTM A789/A790
316 Stainless Steel Pipes and Tubes
Sizes (Seamless):
1/2” NB - 16” NB
316 Stainless Steel Pipes and Tubes
Sizes (ERW): 1/2”
NB - 24” NB
316 Stainless Steel Pipes and Tubes
Sizes (EFW): 6”
NB - 100” NB
316 Stainless Steel Pipes and Tubes Wall
Thickness
available:
Schedule 5S - Schedule XXS (heavier on request)
NACE MR0175, H2 SERVICE, OXYGEN SERVICE, CRYO SERVICE, etc.

All Pipes is manufactured and inspected/tested to the relevant standards including ASTM, ASME and API etc.
Type 316 Stainless Steel has excellent welding
and deep drawing
characteristics - it is easy to fabricate, easy to clean and aesthetically
pleasing to the eye. The steel is common throughout industry particularly in food processing as the material is not susceptible to corrosion from acids found in common foodstuffs. As a consequence, such steel is ideal for items such as sinks, work surfaces, preparation areas and refrigerators. It is also a perfect material for use in the pharmaceutical industry for environments such as clean rooms. Grade 316 can also be found in heat exchangers, chemical containers, pipelines and throughout the brewing industry. It can be used as a fabricated material where high temperature petroleum gases or steam production gases are stored such as pressure vessels. It can even be found extensively in the construction industry where the material is used for cosmetic purposes such as building fascias. 316 plate and pipes have similar properties and in certain cases are stocked with Dual Certification, where it is concluded that each item has properties and a composition which comply with both steel types. Grade 316H cannot be included in this equation due to the steel's higher carbon content which is intended for use in elevated temperature applications. |
316 Stainless Steel Pipes and Tubes
Composition
Typical compositional ranges for grade 316 stainless steels are given in table 1.
Table 1. Composition ranges for 316 grade stainless steel
Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | |
---|---|---|---|---|---|---|---|---|---|---|
316 | min. | - | - | - | - | - | 18.0 | - | 8.0 | - |
max. | 0.08 | 2.0 | 0.75 | 0.045 | 0.030 | 20.0 | 10.5 | 0.10 | ||
316 | min. | - | - | - | - | - | 18.0 | - | 8.0 | - |
max. | 0.030 | 2.0 | 0.75 | 0.045 | 0.030 | 20.0 | 12.0 | 0.10 | ||
316H | min. | 0.04 | - | - | - | - | 18.0 | - | 8.0 | - |
max. | 0.10 | 2.0 | 0.75 | 0.045 | 0.030 | 20.0 | 10.5 |
316 Stainless Steel Pipes and Tubes
Mechanical
Properties
Typical mechanical properties for grade 316 stainless steels are given in table 2.
Grade | Tensile
Strength (MPa) min |
YieldStrength 0.2% Proof (MPa) min |
Elongation (%in 50mm) min |
Hardness
|
|
Rockwell B (HR B) max | Brinell (HB) max | ||||
316 | 515 | 205 | 40 | 92 | 201 |
316 | 485 | 170 | 40 | 92 | 201 |
316H | 515 | 205 | 40 | 92 | 201 |
316H also has a requirement for a grain size of ASTM No 7 or coarser. |

Typical physical properties for annealed grade 316 stainless steels are given in table 3.
Table 3. Physical properties of 316 grade stainless steel in the annealed condition
Grade | Density (kg/m3) | Elastic Modulus (GPa) | Mean Coefficient of Thermal Expansion (m/m/0C) | Thermal Conductivity (W/m.K) | Specific Heat 0-1000C (J/kg.K) | Electrical Resistivity (n.m) | |||
---|---|---|---|---|---|---|---|---|---|
0-1000C | 0-3150C | 0-5380C | at 1000C | at 5000C | |||||
316/L/H | 8000 | 193 | 17.2 | 17.8 | 18.4 | 16.2 | 21.5 | 500 | 720 |

Approximate grade comparisons for 316 stainless steels are given in table 4.
Table 4. Grade specifications for 316 grade stainless steel
Grade | UNS No | Old British | Euronorm | Swedish SS | Japanese JIS | ||
BS | En | No | Name | ||||
316 | S31600 | 316S31 | 58E | 1.4301 | X5CrNi18-10 | 2332 | SUS 316 |
316 | S31603 | 316S11 | - | 1.4306 | X2CrNi19-11 | 2352 | SUS 316 |
316H | S31609 | 316S51 | - | 1.4948 | X6CrNi18-11 | - | - |
These comparisons are approximate only. The list is intended as
a comparison of
functionally similar materials not as a schedule of contractual
equivalents. If
exact equivalents are needed original specifications must be consulted.
|
316 Stainless Steel Pipes and Tubes
Corrosion
Resistance
Excellent in a wide range of atmospheric environments and many
corrosive media.
Subject to pitting and crevice corrosion in warm chloride environments, and to
stress corrosion
cracking above about 600C. Considered resistant to potable water with up to
about 200mg/L chlorides
at ambient temperatures, reducing to about 150mg/L at 600C.
|

Good oxidation resistance in intermittent service to 8700C and
in continuous
service to 9250C. Continuous use of 316 in the 425-8600C range is not
recommended if subsequent
aqueous corrosion resistance is important. Grade 316 is more resistant to
carbide precipitation and
can be heated into the above temperature range.
Grade 316H has higher strength at elevated temperatures so is often used for structural and pressure-containing applications at temperatures above about 5000C and up to about 8000C. 316H will become sensitised in the temperature range of 425-8600C; this is not a problem for high temperature applications, but will result in reduced aqueous corrosion resistance. |

Solution Treatment (Annealing) - Heat to 1010-11200C and cool rapidly. These grades cannot be hardened by thermaltreatment. |