TP316H stainless steel seamless pipe, also known as 1.4919 stainless steel seamless pipe, is an austenitic chromium-nickel-molybdenum stainless tube, in addition with nitrogen and boron.
They are intended for service at temperatures where creep and stress rupture properties are important. 1.4919 stainless steel seamless pipes have a very good resistance to raised temperature. Compared with 316 stainless, 316H stainless has many advantages, such as heat resistance, acid resistance and corrosion resistance. 316H stainless steel is a higher carbon variant of 316 stainless steel, which makes it more suitable for high temperature environment. The increased carbon content delivers a greater tensile and yield strength.
The austenitic structure of TP316H stainless steel seamless pipe also gives it excellent toughness, even down to cryogenic temperatures. We supply and manufacture 316H pipe with a wide range of size, from 10.0mm to 1219mm. The wall thickness of it ranges from 0.5mm to 100mm. The common length of each pipe is 5.8m, 6.0m, 11.8m, 12m. The maximum length we produce is up to 18m. Sheye Metal can produce TP316H pipes in strict accordance with ASTM, EN, JIS, DIN standard to meet clients’ different requirements.
TP316H stainless steel seamless pipe can be cut to size and pipe with polished finish is also available. Wuxi Cepheus owns advanced production equipments and testing instruments. We can inspect our seamless pipes with 16 channel ultrasonic testing machine, 8 channel ultrasonic flaw detector, double channel ultrasonic flaw detector, eddy current flaw detector, hydrostatic testing machine, or X-ray detector.
A lot of processing services, including punching, painting, beveling, chamfering are all available for us. With technical force, advanced equipment and skilled craftsmanship, Wuxi Cepheus can manufacture 316H pipe and good quality is guaranteed. For metal, we are serious.
| Specification | |
| Size | OD: 10.0 ~ 1219mm; WT: 0.5 ~ 100mm; Length: 5.8m, 6m, 11.8m, 12m, Max.18m |
| Process | Seamless, Cold Drawn, Cold Rolled, Hot Rolled |
| Different Name | 1.4919 Pipe X6CrNiMoB17-12-2 Pipe UNS S31609 Pipe |
| End | PE(Plain End), BE(Beveled End), NPT, BW(Butt Weld End) |
| Surface | Aid Pickling, Polishing, Brushing |
| Standard | ASTM A312, ASTM A213, EN10216-5, DIN 17456, DIN 17458, JIS G3459, JIS G3463 |
| Theoretical Weight(kg/m) | Weight/meter = (OD-WT)*WT*0.02507 Both OD and WT in mm. |
Note:
OD is the specified outside diameter.
WT is the specified wall thickness
Stainless steel pipes shall be pickled free of scale. When bright annealing is used, pickling is not necessary.
Plain ends cut and deburred will be furnished. If threaded ends or ends beveled for welding are desired, give details.
Delivery Conditions
| Type of Condition | Surface Condition | |
| HFD | Hot finished heat treated, descaled | Metallically Clean |
| CFD | Cold finished heat treated, descaled | Metallically Clean |
| CFA | Cold finished bright annealed | Metallically Bright |
| CFG | Cold finished heat treated, ground | Metallically bright-ground, the type and degree of roughness shall be agreed at the time of enquiry and order b |
| CFP | Cold finished heat treated, polished | Metallically bright-ground, the type and degree of roughness shall be agreed at the time of enquiry and order b |
| Note a: Combinations of the different conditions may be agreed at the time of enquiry and order; Note b: The enquiry and the order shall indicate whether the roughness requirement applies on the internal or external tube surface. |
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Chemical Composition
| Element | UNS S31609(316H) % |
Tolerances, % |
| C, max | 0.04 to 0.10 | ±0.01 |
| Mn, max | 2.00 | ±0.04 |
| P, max | 0.045 | ±0.005 |
| S, max | 0.030 | ±0.003 |
| Si, max | 1.00 | ±0.05 |
| Ni | 11.0 to 14.0 | ±0.15 |
| Cr | 16.0 to 18.0 | ±0.20 |
| Mo | 2.00 to 3.00 | ±0.10 |
Mechanical Properties
| Alloy | Temper | Tensile Strength Min, MPa |
Yield Strength, 0.2% Offset, min, MPa |
Elongation in2 in. or 50mm (or 4D), min, % |
| UNS S31609 | Solution Annealed | 515 | 205 | 35 |
Tolerances in Wall Thickness
| NPS Designator | Tolerance, % from Nominal | |
| Over | Under | |
| 1/8 to 2-1/2 incl., all t/D ratios | 20 | 12.5 |
| 3 to 18 inch., t/D up to 5% incl. | 22.5 | 12.5 |
| 3 to 18 inch., t/D＞5% | 15 | 12.5 |
| 20 and larger, welded, all t/D ratios | 17.5 | 12.5 |
| 20 and larger, seamless, t/D up to 5% incl. | 22.5 | 12.5 |
| 20 and larger, seamless, t/D＞5% | 15 | 12.5 |
Note: t = Nominal Wall Thickness; D = Ordered Outside Diameter
Tolerances in Outside Diameter
| NPS Designator | Tolerances in Outside Diameter | |||
| Over | Under | |||
| in. | mm | in. | mm | |
| 1/8 to 1-1/2, incl | 1/64 (0.015) | 0.4 | 1/32 (0.031) | 0.8 |
| Over 1-1/2 to 4, incl | 1/32 (0.031) | 0.8 | 1/32 (0.031) | 0.8 |
| Over 4 to 8, incl | 1/16 (0.062) | 1.6 | 1/32 (0.031) | 0.8 |
| Over 8 to 18, incl | 3/32 (0.093) | 2.4 | 1/32 (0.031) | 0.8 |
| Over 18 to 26, incl | 1/8 (0.125) | 3.2 | 1/32 (0.031) | 0.8 |
| Over 26 to 34, incl | 5/32 (0.156) | 4 | 1/32 (0.031) | 0.8 |
| Over 34 to 48, incl | 3/16 (0.187) | 4.8 | 1/32 (0.031) | 0.8 |
Straightness Tolerances
| Specified OD, in. | Specified Wall Thickness, in. | Maximum Curvature in any 3ft, in. | Maximum Curvature i Total Length, in. |
| Up to 5.0 incl. | Over 3% OD to 0.5, incl. | 0.03 | 0.010 x length, ft |
| Over 5.0 to 8.0, incl. | Over 4% OD to 0.75, incl. | 0.045 | 0.015 x length, ft |
| Over 8.0 to 12.75, incl. | Over 4% OD to 1.0, incl. | 0.06 | 0.020 x length, ft |
EN10216-5 1.4919 Seamless Stainless Steel Pipe Tolerance
Tolerances for Outside Diameter (D) and Wall Thickness (T) of 316H Cold Finished Seamless Stainless Steel Pipe/Tube
| Tolerances on D≤219.1mm | Tolerances on T | ||
| Tolerance Class | Permissible Deviation | Tolerance Class | Permissible Deviation |
| D 3 | ±0.75% or ±0.3mm whichever is the greater | T 3 | ±10% or ±0.2mm whichever is the greater |
| D 4 a | ±0.5% or ±0.1mm whichever is the greater | T 4 a | ±7.5 % or ±0.15mm whichever is the greater |
| Note a : Tolerance class D 4 and T 4 is specified for tubes ordered cold finished | |||
Tolerances for Outside Diameter (D) and Wall Thickness (T)
| Outside Diameter D | Tolerances on D | Tolerances on T | ||
| mm | Tolerance Class | Permissible Deviation | Tolerance Class | Permissible Deviation |
| 30 ≤ D ≤ 219.1 | D 2 | ±1.0% or ±0.5mm whichever is the greater | T 1 | ±15% or ±0.6mm whichever is the greater b |
| T 2 | ±12.5% or ±0.4mm whichever is the greater | |||
| 219.1 ≤ D ≤ 610 | D 1 | ±1.5% or ±0.75mm whichever is the greater a | ＋22.5% -15% C | |
| T 1 | ±15% or ±0.6mm whichever is the greater d | |||
| T 2 | ±12.5% or ±0.4mm whichever is the greater e | |||
| Note a : The tubes shall be ordered with size ends. In the case a permissible deviation of the outside diameter of ±0.6% applied to the tube ends over a length of approx. 100mm. Note b : Applies to tubes with wall thickness T≤0.01 D and T≤4mm. Note c : Applies to tubes with wall thickness T≤0.05D Note d : Applies to tubes with wall thickness T:0.05D ＜T≤0.09D Note e : Applies to tubes with wall thickness T＞0.09D |
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Tolerance on Exact Lengths
| Length L | Tolerance on exact length |
| L ≤ 6000 | + 5 0 |
| 6000 ＜ L ≤ 12000 | + 10 0 |
| L ＞ 12000 | + by agreement 0 |
Tests of 316H Pipe
1.Chemical Analysis (ASTM E345)
2.Mechanical Properties (Tension: ASTM E8)
3.Nondestructive Test
3.1:100% Hydrostatic Test
3.2:According to ASTM A450/A450M
Major Manufacturing Facilities for Stainless Steel Pipe and Fittings
| No. | Equipment Name |
| 1 | Cold Rolled Machine(φ12~711mm) |
| 2 | Hydraulic Pressure Cold Drawing Machine(60T, 100T, 150T, 250T, 500T, 1000T) |
| 3 | Chain Cold Drawing Machine(5T, 10T, 20T, 65T) |
| 4 | Peeling Machine(φ60~160mm) |
| 5 | Piercing Mill(φ60~820mm) |
| 6 | Nature Gas Walking Beam Furnace ≤1250℃ (±10℃) |
| 7 | Nature Gas Solution Annealing Furnace ≤1300℃ (±10℃) |
| 8 | Walking Baking Oven |
| 9 | Bright Annealing Oven (OD6-60mm; WT0.4-5mm) |
| 10 | Four-column Type Hydraulic Press Machine (φ108~1219mm) |
| 11 | Seven-roller Straightening Machine(≤φ711mm) |
| 12 | Vertical Straightening Machine(φ30~120mm) |
| 13 | Plastic Pickling Bath |
| 14 | Lathe & Horizontal Band Sawsφ1000mm Max |
| 15 | CNC Bending Machine(MPa32000KN Bending Length 6000mm & MPa24000KN Bending Length 13500mm) |
| 16 | Welding Machine (φ16*0.5~762*26mm) |
| 17 | 7M Pipe Internal Automatic Welding Machine(OD:355-1500MM; L:1500-12000MM) |
| 18 | Pipe Wall Automatic Vertical Shot Blast Machine (8T/D) |
| 19 | CNC Lathe |
| 20 | NC Flame/Plasma Cutting Machine |
| 21 | Bend Cold Pushing |
| 22 | Three Cold Forming Machine |
| 23 | Stainless Steel Pipe Cold Pushing Machine |
| 24 | The Edge Planning Machine |
| 25 | Tube Electric Beveling Machine |
| 26 | Tube Beveling Machine/Beveling Machine |
| 27 | Chamfering Machine |
| 28 | Metal Circular Saw Cutting Machine/Cutting Machine |
| 29 | CNC Plasma Cutting Machine |
| 30 | Air Plasma Cutting Machine |
| 31 | Rolling Machine |
| 32 | P+T Automatic Plate System |