Delivering High Quality Stainless Steel and Alloy Piping Products — Pipes, Tubes, Fittings, Flanges and more for Global Industries.
sales@savoypipinginc.com
Delivering High Quality Stainless Steel and Alloy Piping Products — Pipes, Tubes, Fittings, Flanges and more for Global Industries.
sales@savoypipinginc.com
| Choose | When | Watch-outs |
|---|---|---|
| 304H | Elevated-temperature carbon-controlled austenitic | Do not dual-cert casually with 304L |
| 304 | General service | Lower intentional carbon than H |
| 304L | As-welded corrosion service | Not for H-grade creep duty |
ASTM A312 / ASME SA312 TP304H seamless pipe NPS/OD: ____ Sch/wall: ____ Length: ____ Qty: ____ Ends: PE/BE MTC: 3.1/3.2 Extras: ____ Destination: ____
Email sales@savoypipinginc.com with destination and any IBR / NACE / TPI notes.
Savoy Piping Inc. supplies ASTM A312 TP304H seamless pipe — the higher-carbon 18/8 grade for elevated-temperature strength where 304L would be under-specified.
Grade hub · A312 Seamless · A312 Welded · A213 · A269 · A358 EFW · SS hub · A312 Welded twin
Also see: Stainless steel pipe & tube hub · Seamless pipe · Buttweld fittings · Flanges.
304H pipe to A312/SA312 for general corrosive service. Strength guide: strength levels per SA-312 for TP304H — confirm PO; intended for elevated-temperature service.
Use 304H only when the design temperature / code calls for H-grade carbon. Do not dual-cert confuse with 304L stock for creep service.
| ASTM A312 TP304H Stainless Steel Seamless Pipes Specification | ASTM A269, ASTM A213, ASTM A312, ASME SA269, ASME SA213, ASME SA312 |
| ASTM A312 TP304H Stainless Steel Seamless Pipes Grades | ASTM A312 / ASME SA312 TP304H (UNS S30409) |
| ASTM A312 TP304H Stainless Steel Seamless Pipes Type | Seamless / Welded / ERW / EFW / Cold Draw / Hot Finish / Cold Finish |
| ASTM A312 TP304H Stainless Steel Seamless Pipes Outer Diameter Size | Seamless - 1/2" NB TO 18" NB Welded / ERW- 1" NB TO 16" NB EFW - 8" NB TO 110" NB |
| ASTM A312 TP304H Stainless Steel Seamless Pipes Wall Thickness | Schedule 10 to Schedule 160 (3 mm to 100 mm Thickness) |
| ASTM A312 TP304H Stainless Steel Seamless Pipes Length | 01 Meter to 12.5 Meters, Single Random Length, Double Random Length And Customize Size. |
| ASTM A312 TP304H Stainless Steel Seamless Pipes Ends | Plain Ends / Beveled Ends |
| ASTM A312 TP304H Stainless Steel Seamless Pipes Delivery Conditions | As Rolled, Formed, Stress Relieved, Annealed, Hardened, Tempered, Cold Draw |
| ASTM A312 TP304H Stainless Steel Seamless Pipes Coating | Electropolish, Mechanical Polish, Satin Finish, Passivated |
| ASTM A312 TP304H Stainless Steel Seamless Pipes Other Testing | Product Analysis, Transverse Tension Test, Flattening Test, Etching Test, Radiograph HIC Examination, Stabilizing Heat Treatment, Intergranular Corrosion Test, Weld Decay Test, Magnetic Particle Detection, Grain Size Test, NACE 0175, Dual Grade, PWHT (POST WELD HEAT TREATMENT), Flare Test, Bend Test, Hardness Test, Tensile Test etc |
| ASTM A312 TP304H Stainless Steel Seamless Pipes Dimension | All Pipes Is Manufactured and Inspected / Tested to the Relevant standards including ASTM And ASME |
| ASTM A312 TP304H Stainless Steel Seamless Pipes Value Added Services | Draw / Expansion / Machining / Sand Blasting / Shot Blasting / Heat Treatment / Annealed / Bright Annealed |
| ASTM A312 TP304H Stainless Steel Seamless Pipes Packaging | Loose / Bundle / Wooden Pallet / Wooden box-a / Plastic Cloth Wraps / Plastic End Caps / Beveled Protector |
| ASTM A312 TP304H Stainless Steel Seamless Pipes Shipment & Transportation | By Road - Truck / Train, By Sea - Break-bulk Conventional Vessel / FCL (Full Container Load) / LCL (Less Container Load) / 20 Feet Container / 40 Feet Container / 4 Feet Container / High Cube Container / Open Top Container, By Air - Freighter Civil Passenger and Cargo Planes |
| ASTM A312 TP304H Stainless Steel Seamless Pipes Material Test Certificate | Manufacturer Test Certificate As Per EN10204 3.1, 3.2 / Laboratory Test Certificate From NABL Approved Lab. / Under Third Party Inspection Agency Like SGS, TUV, DNV, LLOYDS, ABS ETC |
The chemical composition of grade 304H Stainless Steel is outlined in the following table
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | |
| 304 | min. | - | - | - | - | - | 18.0 | - | 8.0 | - |
| max. | 0.08 | 2.0 | 1.00 | 0.045 | 0.030 | 20.0 | 11.0 | 0.10 | ||
| 304L | min. | - | - | - | - | - | 18.0 | - | 8.0 | - |
| max. | 0.035 | 2.0 | 1.00 | 0.045 | 0.030 | 20.0 | 12.0 | 0.10 | ||
| 304H | min. | 0.04 | - | - | - | - | 18.0 | - | 8.0 | - |
| max. | 0.10 | 2.0 | 1.00 | 0.045 | 0.030 | 20.0 | 11.0 | |||
The Mechanical Properties of grade 304H Stainless Steel are displayed in the following table.
| Grade | Tensile Strength (MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) min | Hardness | |
| Rockwell B (HR B) max | Brinell (HB) max | ||||
| 304 | 515 | 205 | 40 | 92 | 201 |
| 304L | 485 | 170 | 40 | 92 | 201 |
| 304H | 515 | 205 | 40 | 92 | 201 |
| 304H also has a requirement for a grain size of ASTM No 7 or coarser. | |||||
Physical properties of 304H grade stainless steel in the annealed condition
Grade |
Density (kg/m3) | Elastic Modulus (GPa) | Mean Coefficient of Thermal Expansion (μm/m/°C) | Thermal Conductivity (W/m.K) | Specific Heat 0-100°C (J/kg.K) | Electrical Resistivity (nΩ.m) | |||
| 0-100°C | 0-315°C | 0-538°C | at 100°C | at 500°C | |||||
| 304/L/H | 8000 | 193 | 17.2 | 17.8 | 18.4 | 16.2 | 21.5 | 500 | 720 |
Grade specifications for 304H grade stainless steel
| Grade | UNS No | Old British | Euronorm | Swedish SS | Japanese JIS | ||
| BS | En | No | Name | ||||
| 304 | S30400 | 304S31 | 58E | 1.4301 | X5CrNi18-10 | 2332 | SUS 304 |
| 304L | S30403 | 304S11 | - | 1.4306 | X2CrNi19-11 | 2352 | SUS 304L |
| 304H | S30409 | 304S51 | - | 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. | |||||||
| Nominal Pipe Size | Outside Diameter | Schedule 5 S | Schedule 10 S | Schedule 20 S | Schedule 40 S | Schedule 80 S | Schedule 160 S | XXS | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| mm | inch | mm | WT mm | WEIGHT (KGM) | WT mm | WEIGHT (KGM) | WT mm | WEIGHT (KGM) | WT mm | WEIGHT (KGM) | WT mm | WEIGHT (KGM) | WT mm | WEIGHT (KGM) | WT mm | WEIGHT (KGM) |
| 3 | 1/8 | 10.3 | 1.2 | 0.20 | 1.24 | 0.28 | 1.5 | 0.33 | 1.73 | 0.37 | 2.41 | 0.47 | - | - | - | - |
| 6 | 1/4 | 13.7 | 1.2 | 0.37 | 1.65 | 0.49 | 2.00 | 0.58 | 2.24 | 0.630 | 3.02 | 0.80 | - | - | - | - |
| 10 | 3/8 | 17.1 | 1.2 | 0.47 | 1.65 | 0.63 | 2.00 | 0.74 | 2.31 | 0.840 | 3.20 | 1.10 | - | - | - | - |
| 15 | 1/2 | 21.3 | 1.65 | 0.80 | 2.11 | 1.00 | 2.30 | 1.07 | 2.77 | 1.27 | 3.73 | 1.62 | 4.75 | 1.94 | 7.47 | 2.55 |
| 20 | 3/4 | 26.7 | 1.65 | 1.03 | 2.11 | 1.28 | 2.55 | 1.52 | 2.87 | 1.69 | 3.91 | 2.20 | 5.56 | 2.9 | 7.82 | 3.64 |
| 25 | 1 | 33.4 | 1.65 | 1.30 | 2.77 | 2.09 | 2.55 | 1.94 | 3.38 | 2.50 | 4.55 | 3.24 | 6.35 | 4.24 | 9.09 | 5.4 |
| 32 | 1.1/4 | 42.2 | 1.65 | 1.65 | 2.77 | 2.70 | 3.00 | 2.9 | 3.56 | 3.39 | 4.85 | 4.47 | 6.35 | 5.61 | 9.70 | 7.77 |
| 40 | 1.1/2 | 48.3 | 1.65 | 1.91 | 2.77 | 3.11 | 3.00 | 3.55 | 3.68 | 4.05 | 5.08 | 5.41 | 7.14 | 7.25 | 11.1 | 10.18 |
| 50 | 2 | 60.3 | 1.65 | 2.40 | 2.77 | 3.93 | 3.00 | 4.24 | 3.91 | 5.44 | 5.54 | 7.48 | 8.74 | 11.11 | 11.07 | 13.44 |
| 65 | 2.1/2 | 73.0 | 2.11 | 3.69 | 3.05 | 5.26 | 4.00 | 6.81 | 5.16 | 8.63 | 7.01 | 11.41 | 9.53 | 14.91 | 14.02 | 20.39 |
| 80 | 3 | 88.9 | 2.11 | 4.51 | 3.05 | 6.4 | 4.00 | 8.37 | 5.49 | 11.29 | 7.62 | 15.27 | 11.1 | 21.30 | 15.24 | 27.68 |
| 100 | 4 | 114.3 | 2.11 | 5.84 | 3.05 | 8.36 | 4.50 | 12.18 | 6.02 | 16.07 | 8.56 | 22.32 | 13.49 | 33.54 | 17.12 | 41.03 |
| 125 | 5 | 141.3 | 2.77 | 9.47 | 3.40 | 11.57 | 5.00 | 16.80 | 6.55 | 21.8 | 9.53 | 30.97 | 15.88 | 49.11 | 19.05 | 57.43 |
| 150 | 6 | 168.3 | 2.77 | 11.32 | 3.40 | 13.84 | 6.35 | 25.36 | 7.11 | 28.26 | 10.97 | 42.56 | 18.25 | 67.53 | 21.95 | 79.22 |
| 200 | 8 | 219.1 | 2.77 | 14.79 | 3.76 | 19.96 | 6.35 | 33.31 | 8.18 | 42.55 | 12.7 | 64.64 | 23.01 | 111.27 | 22.23 | 107.92 |
| 250 | 10 | 273.1 | 3.40 | 22.63 | 4.19 | 27.78 | 6.35 | 41.77 | 9.27 | 60.31 | 12.7 | 96.01 | 28.58 | 172.33 | 25.40 | 155.15 |
| 300 | 12 | 323.8 | 3.96 | 31.25 | 4.57 | 36.00 | 6.35 | 49.7 | 9.53 | 73.88 | 12.7 | 132.05 | 33.32 | 238.76 | 25.40 | 186.97 |
| 350 | 14 | 355.6 | 3.96 | 34.36 | 4.78 | 41.3 | 7.92 | 67.80 | 11.13 | 94.59 | ||||||
| 400 | 16 | 406.4 | 4.19 | 41.56 | 4.78 | 47.29 | 7.92 | 77.83 | 12.7 | 123.30 | ||||||
| 40 | 18 | 47.2 | 4.19 | 46.81 | 4.78 | 53.26 | 7.92 | 87.71 | 14.27 | 155.80 | ||||||
| 500 | 20 | 508.0 | 4.78 | 59.25 | 5.54 | 68.61 | 9.53 | 117.14 | 15.09 | 183.42 | ||||||
| 600 | 24 | 610.0s | 5.54s | 82.47 | 6.35 | 94.4 | 9.53 | 141.12 | 17.48 | 255.41 | ||||||
The grade 304H steel can be made into plates, sheets, and coils to be used in the following:
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A312 TP304H is austenitic stainless seamless pipe, UNS S30409, for corrosive and high-temperature service as specified.
This page is the seamless product form. Welded/ERW is listed on the twin page when the PO allows.
18Cr-8Ni high carbon (C typically 0.04–0.10%)
EN 10204 3.1 MTC standard; 3.2 and TPI on request.
We supply this product for domestic and export projects with MTC (EN 10204 3.1 standard; 3.2 / TPI on request). Include destination, Incoterms and inspection needs on the RFQ.