316H Stainless Steel Seamless Pipes & Tubes

The components in the 316H grade are produced in seamless, welded, and ERW configurations. 316HH Stainless Steel Seamless Tube is a high-strength grade that is designed without any welds or seams as hot steel billets are passed through the extruded metal to form a single piece metal tube. The versatile ASTM A312 TP316HH Seamless Pipe is slightly expensive in comparison to welded pipes of this grade due to the material used in producing them. However, these pipes are widely preferred for use in applications across difficult terrain. The 316HH welded Stainless Steel pipe is produced as sheets or strips are welded in place to shape the pipe. These pipes are preferred in low to moderate pressure systems but are cheaper in comparison to seamless pipe grades. A SS 316HH ERW Pipe is manufactured as metal is rolled and welded longitudinally without the need for filler metal using high voltage electric current. These pipes are reliable and very durable for long periods. If you have any queries or questions about the 316HH Stainless Steel Tubing or our products, get in touch with us for more information..
316H Stainless Steel Pipes and Tubes
Product Range
316H Stainless Steel Pipes and Tubes
Specifications:
ASTM A/ASME SA213/A249/A269/A312/A358 CL. I to V ASTM A789/A790
316H Stainless Steel Pipes and Tubes
Sizes (Seamless):
1/2” NB - 16” NB
316H Stainless Steel Pipes and Tubes
Sizes (ERW): 1/2”
NB - 24” NB
316H Stainless Steel Pipes and Tubes
Sizes (EFW): 6”
NB - 100” NB
316H 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 316H 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 316H 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. 316H 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 316HH cannot be included in this equation due to the steel's higher carbon content which is intended for use in elevated temperature applications. |
316H Stainless Steel Pipes and Tubes
Composition
Typical compositional ranges for grade 316H stainless steels are given in table 1.
Table 1. Composition ranges for 316H grade stainless steel
Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | |
---|---|---|---|---|---|---|---|---|---|---|
316H | min. | - | - | - | - | - | 18.0 | - | 8.0 | - |
max. | 0.08 | 2.0 | 0.75 | 0.045 | 0.030 | 20.0 | 10.5 | 0.10 | ||
316H | min. | - | - | - | - | - | 18.0 | - | 8.0 | - |
max. | 0.030 | 2.0 | 0.75 | 0.045 | 0.030 | 20.0 | 12.0 | 0.10 | ||
316HH | min. | 0.04 | - | - | - | - | 18.0 | - | 8.0 | - |
max. | 0.10 | 2.0 | 0.75 | 0.045 | 0.030 | 20.0 | 10.5 |
316H Stainless Steel Pipes and Tubes
Mechanical
Properties
Typical mechanical properties for grade 316H 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 | ||||
316H | 515 | 205 | 40 | 92 | 201 |
316H | 485 | 170 | 40 | 92 | 201 |
316HH | 515 | 205 | 40 | 92 | 201 |
316HH also has a requirement for a grain size of ASTM No 7 or coarser. |

Typical physical properties for annealed grade 316H stainless steels are given in table 3.
Table 3. Physical properties of 316H 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 | |||||
316H/L/H | 8000 | 193 | 17.2 | 17.8 | 18.4 | 16.2 | 21.5 | 500 | 720 |

Approximate grade comparisons for 316H stainless steels are given in table 4.
Table 4. Grade specifications for 316H grade stainless steel
Grade | UNS No | Old British | Euronorm | Swedish SS | Japanese JIS | ||
BS | En | No | Name | ||||
316H | S316H00 | 316HS31 | 58E | 1.4301 | X5CrNi18-10 | 2332 | SUS 316H |
316H | S316H03 | 316HS11 | - | 1.4306 | X2CrNi19-11 | 2352 | SUS 316H |
316HH | S316H09 | 316HS51 | - | 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.
|
316H 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 316H in the 425-8600C range is not
recommended if subsequent
aqueous corrosion resistance is important. Grade 316H is more resistant to
carbide precipitation and
can be heated into the above temperature range.
Grade 316HH 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. 316HH 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. |