254 SMO tubing is a super-austenitic stainless steel alloy designed for use in extremely harsh environments, particularly where chlorides, seawater, or high-stress conditions come into play. ([Alleima][1]) It’s recognized under standards like UNS S31254 and EN 1.4547. ([Alleima][1]) Thanks to its unique alloying, it boasts significantly better resistance to pitting, crevice corrosion, and stress-corrosion cracking compared to standard 300-series stainless steel. ([pacstainless.com][2])
| ASTM Specification | ASTM A312/ASME SA312, ASTM A213/ ASME SA213 |
|---|---|
| Standard | EN, DIN, AISI, AMS, SAE, DTD, DS, NF, JIS, ASME, ASTM, GB, TOCT |
| Seamless Tube Size | 3.35 milimeter To 101.6 milimeter OD |
| Size of Seamless Pipe | Wall thickness.: 0.05- 20 milimeter, 4 – 219 milimeter |
| Size of Welded Pipe | 5.0 to 1219.02 milimeter |
| size of EFW Pipe | 5.0 to 1219.02 milimeter |
| Welded Tube Size | 6.35 milimeter To 152 milimeter OD |
| Bwg & Swg | 18 Swg., 14 20 Swg., Swg. Swg., 12 16 Swg., 10 Swg. |
| Value Added Service | Expansion and Draw as per needed Length and Size, , Polish (Comilimeterercial and Electro), Machining, Annealed & Pickled Bending Etc. |
| Pipe Schedule | STD, SCH120, SCH20, SCH10S, SCH30, SCH40, SCH140, SCH40S, SCH160, XS, SCH60, SCH5, SCH10, SCH80, XXS, SCH80 |
| Tubing wall thickness | 0.020″ –0.220″, (custom wall thicknesses available) |
| Finish | AP (Annealed & Pickled), BA (Bright & Annealed), NO.1, 2B, Polished, MF, HL, NO.4, Mirror finish, BA, 8K etc |
| End | Plain End, Beveled End, Treaded Pipe, Screwed ends |
| Length | Standard & Cut length , Single Random, Double Random Pipe |
| SMO 254 | C | Ni | Cr | Mn | Mo | Fe | Si | S | Cu | P |
| 0.002 maximum | 17.05 to 18.05 | 19.05 to 20.05 | 1 maximum | 6 to 6.05 | to | 0.08 maximum | 0.001 maximum | 0.05 to 1 | 0.003 maximum |
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This alloy contains high levels of chromium (~19.5-20.5%), nickel (~17.5-18.5%), molybdenum (~6.0-6.5%), and nitrogen (~0.18-0.25%). ([silver-tubes.com][3]) It has a very low carbon content (≤ 0.02%) to boost its corrosion resistance. ([ashtapadoverseas.com][4]) In terms of mechanical properties, one supplier lists the tensile strength in the annealed state at around 690-830 MPa (approximately 100-120 ksi) with a minimum elongation of about 35%. ([elgiloy.com][5]) The typical yield strength is around 300 MPa or more. ([aesteiron.com][6]) Its density is roughly 8.0 g/cm³. ([elgiloy.com][5]) Notably, this alloy is recognized for its excellent weldability and formability, even with its high alloy content. ([pacstainless.com][2])
Mbemba Stainless is a leading supplier, and stockist of high-quality stainless steel 254 tubing in Kinshasa, Congo. Our products are widely used in various applications, and we are committed to delivering excellent service, resulting in high customer satisfaction. Our unique finishing techniques further distinguish us in the stainless steel industry. We are dedicated to consistently providing superior products and effectively meeting our customer’s needs.
Thanks to its outstanding corrosion resistance and strength, 254 SMO tubing finds its way into demanding applications across various industries:
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