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13-8 Mo (UNS S13800, 1.4534)

Applications

Petrochemical Components, Aircraft Structural parts, Fittings, Fasteners, Valves

Features

  • 13-8 Mo is a martensitic precipitation-hardening stainless steel that conforms to the AMS 5629, AMS 5864 specifications.
  • This material is characterised by excellent strength, corrosion resistance, and toughness at both room and elevated temperatures.
  • 13-8 Mo (UNS S13800) is often used in aerospace, chemical processing, and power generation applications where high strength and corrosion resistance are essential. The material is not particularly easy to work with due to its high strength and toughness, which can make cutting and machining difficult.
  • 13-8 Mo stainless steel is produced by Vacuum Induction Melting (VIM) followed by Vacuum Arc Remelting (VAR).

Material

13-8 Mo / UNS S13800 / W.Nr 1.4534

Physical properties

Density 7.76 g/cm3

Mechanical properties

Condition Tensile Strength, min, MPa Yield Strength, min. (0.2 % offset), min, MPa Elongation in 2 in. or 50 mm (or 4D), % Reduction of Area, min,% Hardness, HRC
H950 1517 1413 10 45 45
H1000 1413 1310 10 50 43
H1025 1276 1207 11 50 41
H1050 1207 1138 12 50 40
H1100 1034 931 14 50 34
H1150 931 621 14 50 30

Round bar

Standard

AMS 5629 / AMS 5864

Chemical composition (Nominal) %

Grade C Mn Si P S Cr
13-8 Mo 0.05 max 0.10 max 0.10 max 0.01 max 0.008 max 12.25-13.25
Ni Al N Mo Fe
7.50-8.50 0.90-1.35 0.010 max 2.00-2.50 Bal

Size range

Product Material DIA Range Length Range
ROUND BAR 13-8 Mo Φ5mm ~ Φ500mm 3000~6000mm

Plate and sheet

Standard

AMS 5629

Chemical composition (Nominal) %

Grade C Mn Si P S Cr
13-8 Mo 0.05 max 0.10 max 0.10 max 0.01 max 0.008 max 12.25-13.25
Ni Al N Mo Fe
7.50-8.50 0.90-1.35 0.0 max 2.00-2.50 Bal

Size range

Product Material WD Range Length Range WT Range
PLATE & SHEET 13-8 Mo 1000~2000mm 2000~6000mm 0.5~150mm