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17-4 PH (UNS S17400, 1.4548)

Applications

Motor Shafts, Aircraft Structural parts, Valve Stems, Gears

Features

  • The 17-4 PH is a martensitic precipitation-hardening stainless steel with excellent corrosion resistance and outstanding mechanical properties. Conforming to the stringent AMS 5604, AMS 5622, and AMS 5643 specifications, this alloy is meticulously engineered to meet the most demanding industrial requirements.
  • The exceptional corrosion resistance of the 17-4 PH alloy stems from its carefully crafted chemical composition, blending chromium, nickel, and copper in precise proportions, this unique formulation imbues the material with an unrivaled ability to withstand a broad spectrum of corrosive environments.
  • Moreover, the alloy’s precipitation hardening capabilities allow for precise control over its mechanical properties, through a carefully controlled heat treatment process, 17-4 PH can achieve remarkable strength and hardness levels while maintaining excellent toughness and ductility.

Standard

AMS 5604 / AMS 5622 / AMS 5643

Material

17-4 PH / UNS S17400 / W.Nr 1.4548

Chemical composition (Nominal) %

Grade C Mn Si P S Cr
17-4 PH 0.07 max 1.00 max 1.00 max 0.040 max 0.030 max 15.00-17.50
Ni Nb Cu Mo Fe
3.00-5.00 5xC%-0.45 3.00-5.00 0.50 max Bal

Physical properties

Density 7.74 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, HB Hardness, HRC
H900 1310 1172 10 40 388-444 40-47
H925 1172 1069 10 44 375-429 38-45
H1025 1069 1000 12 45 331-401 34-42
H1075 1000 862 13 45 311-375 31-38
H1100 965 793 14 45 302-363 30-37
H1150 931 724 16 50 277-352 28-37

Round bar

Size range

Product Material WD Range Length Range
ROUND BAR 17-4 PH Φ5mm ~ Φ500mm 3000~6000mm

Plate and sheet

Size range

Product Material WD Range Length Range WT Range
PLATE & SHEET 17-4 PH 1000~2000mm 2000~6000mm 0.5~150mm