C&N Industiral,huitong limtied is professional pipe,flange and fitting manufacturer,our products approved by PDO, SADARA, SWCC,PDO etc.
We are a professional manufacturer of 254SMO Hex bolts,according to DIN 931,DIN 933, ISO 4014 ,ISO 4017 .
We also supply 254SMO stud bolts ,1.4547 Uns S31254 Stud bolts.
254SMO is an austenitic stainless steel designed for maximum resistance to pitting and crevice corrosion. With high levels of chromium, molybdenum, and nitrogen, 254SMO fasteners are especially suited for high chloride environments such as brackish water seawater pulp mill bleach plants and other high chloride process streams. It is commonly supplied to the ASTM Petrochemical Bolting standard ASTM A193 B8M LCuN & ASTM A194 8M LCuN
ASTM A479 SMO 254 Fasteners Equivalent Grades
| STANDARD | UNS | WERKSTOFF NR. | EN |
| 254 SMO® | S31254 | 1.4547 | X1CrNiMoCuN20-18-7 |
6% Molybdenum Hex bolts/Stud bolts Chemical Composition
| Grade | C | Ni | Si | N | S | Mn | P | Cr | Ce | Fe | |
| SS 254 SMO | min. | – | 17.5 | – | 0.18 | – | – | – | 19.5 | 0.03 | Balance |
| max. | 0.02 | 18.5 | 0.08 | 0.22 | 0.01 | 1.00 | 0.03 | 20.5 | 0.08 | ||
Alloy 254 SMO Nuts and Bolts Mechanical Properties
| Grade | Tensile Strength (MPa) min | Elongation (% in 50mm) min | Yield Strength 0.2% Proof (MPa) min | Hardness | |
| Rockwell B (HR B) max | Brinell (HB) max | ||||
| 254 SMO | 650 | 35 | 300 | 50 | 270 |
Our fasteners product range:
| Type | Stud Bolt | Hex Bolt (full thread, partial thread) | Threaded Rod |
| U-Bolt | Hex Socket Cap Screw | Hex Nut | |
| Flat Washer | Spring Washer | ||
| Size | Stud Bolt | DIN: M6~M100 | ASME: 1/4″~5″ |
| Hex Bolt | DIN: M6~M64 | ASME: 1/2″~2 1/2″ | |
| Finish | Cold galvanizing, Hot-dip Galvanizing, PTFE, Zinc Nickel, Black coating, Plain | ||
| Producing Standard | ASME | ASME B18.2.1 | Hex Bolts |
| ASME B18.2.2 | Hex Nuts | ||
| ASME B18.22.1 | Plain Washers | ||
| DIN | DIN931 | Hex Bolt with partial thread | |
| DIN 933 | Hex Bolt with full thread | ||
| DIN 912 | Hex Socket Cap Screw | ||
| DIN 934 | Hex Nut | ||
| DIN 125 | Plain Washer | ||
| DIN127 | Spring Washer | ||
| DIN 975 | Threaded Rods | ||
| DIN 976 | Stud Bolts | ||
| DN 3570 | U-Bolt | ||
| Material Grade | Stainless Steel | 304/304L, 316/316L, 316Ti, 317/317L, 321, 347/347H, 310, 309, A453 660C,660D, S31254 /254SMO, 904L /1.4539 /N08904, N08367, N08926 / 1.4529 | |
| Duplex Steel | 2205 /S31803, S32750/2507, S32760 | ||
| Nickel Alloy Steel | UNS N02200/Ni 200, UNS N02201 /Ni201, UNS N04400/ Monel 400, UNS N05500/ Monel K500 , UNS N06600/ Inconel 600, UNS N06601/ Inconel 601, UNS N06625/ Inconel 625, UNS N08825/ Incoloy 825, UNS N08800 /Incoloy 800, UNS N08810 /Incoloy 800H , UNS N08811 /Incoloy 800HT, UNS N08020 /Alloy 20, UNS N06002 /Hastelloy X, UNS N06022/ Hastelloy C22, UNS N06200/C2000, UNS N10276/ Hastelloy C276, UNS N10665 /Hastelloy B2, UNS N10675/Hastelloy B3, UNS N08031/ Alloy 31 | ||
| Carbon Steel | Grade 4.8, 5.8, 6.8, 8.8, 10.8, 12.9 | ||
| Alloy Steel | A193 B7, A194 2H, A320 L7, L7M | ||
