15-5

15-5

The 15-5 alloy was designed to have greater toughness than 17-4 PH. The 15-5 alloy is martensitic in structure in the annealed condition and is further strengthened by a relatively low temperature heat treatment which precipitates a copper containing phase in the alloy. 15-5 is also referred to as XM-12 in some specifications.

Chemistry

 NiCrMnCuSiCb+TaCPSFe
MIN 3.5 14.0 - 2.5 - 0.15 - - - -
MAX 5.5 15.5 1.0 4.5 1.0 0.45 0.07 0.04 0.03 Balance

Specifications

AMS 5659, AMS 5862, AMS 5862J Type 2
ASME SA 564, ASME SA 693, ASME SA 705
ASTM A 564, ASTM A 693, ASTM A 698, ASTM A 705, ASTM-A564 (XM-12)
BAC 5439 Rev H Class A Type1
BMS 7-240 (Boeing)
BSS7055 Rev A
STD 2154
UNS S15500
W. Nr./EN 1.4545

Inventory

15-5 Flat Bar, 15-5 Plate, 15-5 Round Bar

Common Trade Names

15-5 Stainless, 15-5 PH

Features

  • Precipitation Hardening
  • High Strength
  • Moderate corrosion resistance to 600°F

Applications

  • Aerospace applications
  • Chemical and petrochemical applications
  • Pulp and paper
  • Food processing

Physical Properties

Density: 0.280 lb/inch3
Poisson's Ratio: 0.272
Electrical Resistivity: 589 Ohm-circ mil/ft

Temperature, °F 70 200 800
Coefficient of Thermal Expansion, in/in°F x 10-6 - - 6.3
Thermal Conductivity
Btu • ft/ft2 • hr • °F
- 10.6 -
Modulus of Elasticity,
psi X 106
28.5 - -

* 70°F to indicated temperature.

Mechanical Properties

Minimum Specified Properties, ASTM A 564

Condition H 900 H 1075 H 1150 A
0.2 Offset Yield Strength, ksi 170 125 105 -
Ultimate Tensile Strength, ksi 190 145 135 -
Elongation % in 2" minimum 10 13 16 -
Reduction of Area, % 35 45 50 -
Hardness, Brinell 388 311 277 363 (MAX)