Specialist in Manufacturing Industrial Steel Fasteners

254 SMO Fasteners

ASTM A479 UNS S31254 254 SMO Fasteners, High Tensile Fasteners, Custom Grade & Size Available At Best Price & Free Sample

Vision Alloys are the leading manufacturer of high integrity 254 SMO Fasteners (e.g. bolts, set screws, stud-bolts, nuts and washers), meeting clients’ exacting demands for critical applications in hostile environments. Whether for offshore (buoyancy and petrochemical), seawater, pump, valve or nuclear, the demands for an exceptional service and supply is never ending. We believe manufacturing bolting in exotic materials is an art form and it is something we have perfected at Vision Alloys.

Our 254 SMO Fasteners product range includes 254 SMO Bolts, Hexagon head bolt, Hexagon head screw, Round head square neck bolt, Hexagon socket head cap screw in full thread and half thread, Hexagon wood screw, Hexagon socket button head screw, Hexagon socket button flange screw, Hexagon socket counter sunk head cap screw in full thread and half thread, square nuts, square weld nuts, hexagon weld nuts, thick nyloc nuts, hexagon flange nuts, threaded rods, dowel screws, Plain / Flat Washer, Spring Washers, Countersunk Washer,Tooth Lock Washer and many more. We provide products as per DIN, ANSI, JIS standards.

254 SMO is an austenitic stainless steel designed for superior pitting and crevice corrosion. 254 SMO is ideal for high-chloride environments because of its high levels of chromium, molybdenum, and nitrogen. 254 SMO is often used where 316L or 317L has failed. 254 SMO is significantly stronger than the common austenitic grades, and it is also characterized by high ductility and impact strength..If we do not have your 254 SMO Fasteners in stock (Inch or Metric) we can have these manufactured to your specification.

254 SMO Fasteners Specification :

Material
Size
Length
Specification

254 SMO

 

M02 to M30

3 mm
to 
200 mm

IS

BS

ASTM

Material:
254 SMO
Standard :

ASTM / ASME SB 479

Grade:

UNS S31254

Type of Fasteners:

Bolts : Bolts stud bolts, hex head bolts, socket hexagon head screw anchor bolts, u-bolts, J bolts, mushroom head square neck bolts, t- head bolts, wing screw, eye bolt, eye bolt, foundation bolts and structural bolts

Washer : Plain washer , plain big & small OD washer , spring lock washer , spring washer heavy duty , tooth washer , star washer , tab washer with one & two tab

Nuts : Hexagon nuts, hexagon coupling nuts, hexagon thin nut, square nut, hexagon castle nuts, self locking nut, hexagon domed cap nuts

Screw : Pan head slotted screws, cheese head slotted screws, countersunk head slotted screws, countersunk raised head slotted screws, pan phillipse head screw, countersunk Phillipse raised head screws, slotted cheese trim head machine screws, socket head allen cap screws, allen countersunk socket head cap screws, socket head shoulder screws, socket head cap screw low head, hexagon socket set screw with flat point, hexagon socket set screws with cone point, hexagon socket set screw with dog point, hexagon socket set screws with dog point, hexagon socket set screws with cup point, imprial socket cap screws.

Other : Threaded rod, as per drawing and customers spec. coating, hot dipped galvanizing, phosphate, Teflon, xylon, zinc, cadmium.

 

In Form of:

Hex, Square, Round , Threading as per Gauge Etc.

Grade Designation :

Standard
UNS
Werkstoff Nr.
EN
SS
AFNOR
254 SMO
S31254
1.4529
X1CrNiMoCuN20-18-7
2378*
Z1 CNDU 20.18.06AZ*

254 SMO Fasteners Composition :

Chemical Composition
Typical compositional ranges for grade 254 SMO Fasteners

Element
Content (%)
Chromium, Cr
55.69
Iron, Fe
20
Nickel, Ni
18
Molybdenum, Mo
6.1
Nitrogen, N
0.20
Carbon, C
0.010

Mechanical Properties
Typical mechanical properties for grade 254 SMO Fasteners

Properties
Metric
Imperial
Tensile strength
680 MPa
98600 psi
Yield strength
300 MPa
43500 psi
Modulus of elasticity
195 GPa
28300 ksi
Shear modulus
75 GPa
10900 ksi
Poisson’s ratio
0.30
0.30
Elongation at break
50 %
50 %
Hardness, Brinell
210
210

Physical Properties
Typical Physical properties for grade 254 SMO Fasteners

Properties
Metric
Imperial
Density
8 g/cm3
0.289 lb/in3

Thermal Properties
Typical Thermal Properties for grade 254 SMO Fasteners

Properties
Metric
Imperial
Thermal expansion co-efficient (@20-100°C/68-212°F)
16.5 µm/m°C
9.17 µin/in°F
Thermal conductivity
14 W/mK
97.2 BTU in/hr.ft².°F

254 SMO Fasteners Surface Coating :

  • Hot Dipped Galvanizing
  • Epoxy Coating
  • Electro Polished
  • Passivation
  • Zinc Plating
  • Chrome Plating
  • Mirror Buffed
  • Teflon Coating
  • Oxidized
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