Silver Tubes manufactures and exports Stainless Steel 316H tubes from our stocking yard in Mumbai, India. Buyers approach us as a stainless steel 316H tube supplier when a line runs hot and the lower carbon grades begin to creep. The 316H grade carries 0.04 to 0.10% carbon, and that carbon is what holds tensile strength together above 500°C. Molybdenum at 2 to 3% covers the corrosion side, including pitting in chloride service. As a stainless steel 316H tubes manufacturer, we supply the grade in seamless and welded form, in outside diameters from 6 mm to 219 mm, with wall thickness cut to drawing. Material conforms to ASTM A213, A249, A269, and matching ASME SA specifications.
Silver Tubes runs as a professionally managed export house built by a young promoter team, and stock depth is where we compete. Our Mumbai warehouse carries every size in our supply scope, so most orders ship immediately instead of waiting on a mill run. Each lot passes an in-house quality check, and we arrange third party inspection whenever your specification calls for it. Customization is routine here: odd lengths, non-standard wall thickness, and mixed grade orders. Pricing stays competitive because we buy and stock in volume. Consignments leave on the committed date, which repeat buyers value most. Contact our desk for a quote against your size and quantity.
Stainless Steel 316H tube is the high carbon variant of the 316 austenitic family. It shares the same base chemistry: 16 to 18% chromium, 10 to 14% nickel, and 2 to 3% molybdenum. Carbon is the only real point of difference. Standard 316 caps carbon at 0.08%, while the H grade holds a controlled band of 0.04 to 0.10%. That extra carbon forms stable carbides inside the grain structure, which is why 316H keeps its creep rupture strength through continuous service at 870°C. Minimum tensile strength sits at 515 MPa against a 205 MPa yield. The grade also specifies a coarser grain size, ASTM No. 6 or coarser, and resists sulfuric acid in process piping.
| Specifications | ASTM A213, A249, A269 / ASME SA213, SA249, SA269 |
| Outside Diameter | 6.00 mm OD up to 914.4 mm OD, Sizes up to 24" NB available Ex-stock, OD Size Steel Tubes available Ex-stock |
| Thickness Range | 0.3mm – 50 mm, SCH 5, SCH10, SCH 40, SCH 80, SCH 80S, SCH 160, SCH XXS, SCH XS |
| Type | Seamless / ERW / Welded / Fabricated / CDW |
| Form | Round Tubes, Square Tubes, Rectangular Tubes, Coiled Tubes, "U" Shape, Pan Cake Coils, Hydraulic Tubes |
| Length | Single Random, Double Random & Required Length |
| End | Plain End, Beveled End, Treaded |
| Outside Finish | 2B, No.4, No.1, No.8 Mirror Finish for Stainless Steel Tubes, Finish as per customer Requirements |
| Delivery Condition | Annealed and Pickled, Polished, Bright Annealed, Cold Drawn |
| EN 10216-5 | EN 10216 316H Seamless Steel Tubes, EN 10216-5 1.4401 Seamless Steel Tube for pressure purposes |
| EN 10217-7 | EN 10217 316H Welded Steel Tubes, Steel EN 10217-7 1.4401 Welded Tube for pressure purposes |
| STANDARD | UNS | WERKSTOFF NR. |
| SS 316H | S31609 | 1.4401 |
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | Fe |
| SS 316H | 0.10 max | 2.0 max | 0.75 max | 0.045 max | 0.030 max | 16.00 - 18.00 | 2.00 - 3.00 | 10.00 - 14.00 | 68.89 min |
| Grade | Tensile Strength | Yield Strength | Elongation |
| SS 316H | Psi – 75000, MPa – 515 | Psi – 30000, MPa – 205 | 35 % |

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Carbon separates the two grades. 316H holds 0.04 to 0.10%; standard 316 caps it at 0.08%.
Yes. The grade runs continuously at 870°C and tolerates 925°C intermittently.
We supply against ASTM A213, A249, A269, and A312, plus equivalent ASME SA grades.
Yes. Our mill produces outside diameters, wall thicknesses, and cut lengths to your drawing.
Yes. Both forms ship from stock. Seamless suits high pressure duty; welded works on lower pressure lines.
Refineries, power plants, petrochemical units, and heat exchanger fabricators order this grade regularly.
Yes. As an SS 316H tube supplier, we ship from Mumbai to the Gulf, Europe, Africa, and the Americas.
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