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
Savoy Piping Inc. supplies 304H — 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
304H (UNS S30409): 18Cr-8Ni high carbon (C typically 0.04–0.10%). Mechanical 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.
304H vs 321H/347H: stabilised grades resist polythionic / sensitization issues better in some refinery cycles — follow the materials engineer.
| Choose | When | Watch-outs |
|---|---|---|
| A312 seamless pipe | Process piping NPS + schedule | State seamless vs welded |
| A213 / A269 tube | HX / instrument OD×wall | Do not mix pipe schedules casually |
| SS hub | Browse related grades | Confirm dual-cert on MTC |
304H stainless — form: A312 pipe / A213 tube / A269 tube Size: ____ Wall/Sch: ____ Qty: ____ MTC: 3.1/3.2 Destination: ____
Email sales@savoypipinginc.com with destination and any IBR / NACE / TPI notes.
| 304H Stainless Steel Pipe & Tubes Specification | ASTM A269, ASTM A213, ASTM A312, ASME SA269, ASME SA213, ASME SA312 |
| 304H Stainless Steel Pipe & Tubes Grades | 304H pipe & tube forms (A312 / A213 / A269 / A358 as ordered) |
| 304H Stainless Steel Pipe & Tubes Type | Seamless / Welded / ERW / EFW / Cold Draw / Hot Finish / Cold Finish |
| 304H Stainless Steel Pipe & Tubes Outer Diameter Size | Seamless - 1/2" NB TO 18" NB Welded / ERW- 1" NB TO 16" NB EFW - 8" NB TO 110" NB |
| 304H Stainless Steel Pipe & Tubes Wall Thickness | Schedule 10 to Schedule 160 (3 mm to 100 mm Thickness) |
| 304H Stainless Steel Pipe & Tubes Length | 01 Meter to 12.5 Meters, Single Random Length, Double Random Length And Customize Size. |
| 304H Stainless Steel Pipe & Tubes Ends | Plain Ends / Beveled Ends |
| 304H Stainless Steel Pipe & Tubes Delivery Conditions | As Rolled, Formed, Stress Relieved, Annealed, Hardened, Tempered, Cold Draw |
| 304H Stainless Steel Pipe & Tubes Coating | Electropolish, Mechanical Polish, Satin Finish, PassivateD |
| 304H Stainless Steel Pipe & Tubes 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 |
| 304H Stainless Steel Pipe & Tubes Dimension | All Pipes Is Manufactured and Inspected / Tested to the Relevant standards includingASTM And ASME |
| 304H Stainless Steel Pipe & Tubes Value Added Services | Draw / Expansion / Machining / Sand Blasting / Shot Blasting / Heat Treatment |
| 304H Stainless Steel Pipe & Tubes Packaging | Loose / Bundle / Wooden Pallet / Wooden box-a / Plastic Cloth Wraps / Plastic End Caps / Beveled Protector |
| 304H Stainless Steel Pipe & Tubes 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 |
| 304H Stainless Steel Pipe & Tubes 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. | |||||||
The grade 304H steel can be made into plates, sheets, and coils to be used in the following:
304H (UNS S30409) is the higher-carbon 18/8 grade for elevated-temperature strength where 304L would be under-specified. Chemistry: 18Cr-8Ni high carbon (C typically 0.04–0.10%).
Pipe A312 / A358 EFW; tube A213 / A269 (and A249 welded where specified).
strength levels per SA-312 for TP304H — confirm PO; intended for elevated-temperature service
304H vs 321H/347H: stabilised grades resist polythionic / sensitization issues better in some refinery cycles — follow the materials engineer.
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.