AISI 4130 Bolts

Nitronic 50 fasteners are manufactured in all types of bolts screws, stud bolts, studs, threaded rods, nuts, washers and custom bolting parts, in metric and imperial sizes. Boltport produced these fasteners from forging stock or bar stock to relevant specifications. Nitronic 50 is alternativaly known as XM-19 and UNS S20910. So often these fasteners are ordered as per their grade equivalents. ASTM A182 FXM-19, A276 & A479 are most commonly specification for producing nitronic 50 fasteners.

NITRONIC 50 Stainless Steel provides a combination of corrosion resistance and strength not found in any other commercial material available in its price range. Also referred as Alloy XM-19 or its UNS Designation S20910. This austenitic stainless has corrosion resistance greater than that provided by Types 316 and 316L, plus approximately twice the yield strength at room temperature. In addition, NITRONIC 50 Stainless has very good mechanical properties at both elevated and sub-zero temperatures. And, unlike many austenitic stainless steels, NITRONIC 50 does not become magnetic when cold worked. Alloy XM-19 or N-50 is a high strength austenitic stainless steel with good corrosion resistant. It has nearly double the yield strength of 304 and 316 stainless steel and has better corrosion resistance than 317L stainless steel.

Chemical Composition

  • Carbon C 0.06% Max
  • Manganese Mn 4.00-6.00% max
  • Sulphur S 0.03% max
  • Phophorous P 0.045% max
  • Silicon Si 1.00% max
  • Nickel Ni 11.5-13.5%
  • Chromium Cr 20.5-23.5%
  • Molybdenum Mo 1.50-3.00%
  • Niobium Nb 0.10-0.30%
  • Vanadium V 0.10-0.30%
  • Nitrogen N 0.20-0.40%
  • Iron Fe Balance

Mechanical Properties

  • Tensile Strength : 900 MPa
  • Yield Strength : 590 MPa
  • Elongation : 35% min
  • Reduction of Area : 55% min
  • Hardness, Brinell : --

Nitronic 50 Grade Equivalent

Designation UNS DIN
XM-19 S20910 1.3964

Nitronic 50 Fastening Products

Nitronic 50 Specifications

Specifications Material Form Products
ASTM A182 Grade FXM-19    
ASTM A240 UNS S20910    
ASTM A276 UNS S20910    
ASTM A479 UNS S20910    

Nitronic 50 Applications

Nitronic 50 fasteners are widely used for bolting pipeline components, instruments & equipments in following sectors.