17-4PH / 15-5PH / 13-8Mo PH Stainless Steel Round Bars

17-4PH, 15-5PH and 13-8Mo are martensitic precipitation hardening stainless steels that combine high strength, good corrosion resistance and simple heat treatment. Supplied in the solution annealed condition (Condition A), they are machined and then aged at 480 to 620 °C to reach tensile strengths of 930 to 1520 MPa with minimal distortion. 15-5PH is the ferrite-free, remelted version of 17-4PH with better transverse toughness, and 13-8Mo offers the highest strength and fracture toughness of the three.

Nexforge Alloys manufactures and stocks 17-4PH, 15-5PH and 13-8Mo round bars in Condition A and in aged conditions H900, H1025, H1075, H1150 and H1150M as per ASTM A564 / A705, ASME SA564 and AMS 5643, AMS 5659 and AMS 5629. Bars are ground or peeled and certified with chemical, tensile and hardness results.

17-4PH (UNS S17400), 15-5PH (UNS S15500) and 13-8Mo (UNS S13800) round bars from 6 mm to 300 mm diameter, in Condition A or aged H900 to H1150, as per ASTM A564 / AMS 5643 / 5659 / 5629.

17-4PH / 15-5PH / 13-8PH Round Bar Specification

ParameterDetails
Grades17-4PH (S17400, 1.4542, Type 630), 15-5PH (S15500, 1.4545, XM-12), 13-8Mo (S13800, 1.4534, XM-13)
StandardsASTM A564, ASTM A705, ASME SA564, AMS 5643, AMS 5622, AMS 5659, AMS 5629, EN 10088-3
Size Range6 mm to 300 mm diameter
LengthRandom 3 to 6 metres, or cut to length
ConditionSolution annealed (Condition A) or aged H900 / H925 / H1025 / H1075 / H1100 / H1150 / H1150M
Surface FinishPeeled, centreless ground, bright, rough turned
Toleranceh9 / h10 / h11 or as per drawing
TestingChemical, tensile, hardness, impact, macro-etch, UT (AMS 2154) on request
CertificationEN 10204 3.1 mill test certificate

Chemical Composition (% by weight)

Grade (UNS)CMnSiPSCrNiCuMoAlNb + TaNFe
17-4PH (S17400)0.07 max1.00 max1.00 max0.040 max0.030 max15.0 - 17.53.0 - 5.03.0 - 5.0--0.15 - 0.45-Balance
15-5PH (S15500)0.07 max1.00 max1.00 max0.040 max0.030 max14.0 - 15.53.5 - 5.52.5 - 4.5--0.15 - 0.45-Balance
13-8Mo (S13800)0.05 max0.20 max0.10 max0.010 max0.008 max12.25 - 13.257.5 - 8.5-2.00 - 2.500.90 - 1.35-0.010 maxBalance

Mechanical Properties

GradeConditionTensile Strength (min)0.2% Yield Strength (min)Elongation (min)Hardness (min)Density
17-4PH / 15-5PHH9001310 MPa (190 ksi)1170 MPa (170 ksi)10 %40 HRC7.78 g/cm³
17-4PH / 15-5PHH10251070 MPa (155 ksi)1000 MPa (145 ksi)12 %35 HRC7.78 g/cm³
17-4PH / 15-5PHH10751000 MPa (145 ksi)860 MPa (125 ksi)13 %32 HRC7.78 g/cm³
17-4PH / 15-5PHH1150930 MPa (135 ksi)725 MPa (105 ksi)16 %28 HRC7.78 g/cm³
13-8MoH9501520 MPa (220 ksi)1410 MPa (205 ksi)10 %45 HRC7.76 g/cm³
13-8MoH10001410 MPa (205 ksi)1310 MPa (190 ksi)10 %43 HRC7.76 g/cm³
13-8MoH10501240 MPa (180 ksi)1170 MPa (170 ksi)12 %40 HRC7.76 g/cm³

Values are minimum or typical figures as per the referenced standards and are for guidance only. Please refer to the mill test certificate supplied with the material for actual values.

17-4PH / 15-5PH / 13-8PH Round Bar stock
17-4PH / 15-5PH / 13-8PH Round Bar finish

Key Features

  • Strength up to 1520 MPa with a single low temperature ageing treatment
  • Corrosion resistance comparable to 304 in most environments
  • Machinable in Condition A, aged with minimal distortion
  • 15-5PH and 13-8Mo offer superior transverse toughness for critical parts

Applications

  • Aerospace structural parts, actuators, fasteners and landing gear components
  • Pump shafts, impellers and valve components in oil and gas and chemical plants
  • Gears, couplings, spindles and high strength machined parts
  • Nuclear reactor components and turbine blades
  • Paper mill, food processing and firearms components
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