UNS S17400 (17-4 PH, Alloy 630) Stainless Steel

Precipitation-Hardening Stainless Steels

Material conditionhardened (H)

Overview Chemical Composition Mechanical Properties Physical Properties Other Properties

Property Overview

Density7.8g/cm³

Elastic Modulus190GPa

Tensile Strength1140MPa

Yield Strength1060MPa

Brinell Hardness370HB

Maximum Service Temperature850°C

Weight Calculator

Chemical Composition

0 to 0.070%

15 to 17%

3.0 to 5.0%

0 to 1.0%

0 to 0.040%

0 to 0.030%

3.0 to 5.0%

0.15 to 0.45%

70.4 to 78.9%

Mechanical

Elastic (Young's, Tensile) Modulus

190 GPa

Elongation at Break

13 %

Fatigue Strength

600 MPa

Impact Strength: V-Notched Charpy

23 J

Poisson's Ratio

0.28

Reduction in Area

50 %

Shear Modulus

75 GPa

Shear Strength

690 MPa

Tensile Strength: Ultimate (UTS)

1140 MPa

Tensile Strength: Yield (Proof)

1060 MPa

Hardness

Brinell Hardness

370

Rockwell C Hardness

Physical

Density

7.8 g/cm 3

Thermal

Latent Heat of Fusion

280 J/g

Maximum Temperature: Corrosion

450 °C

Maximum Temperature: Mechanical

850 °C

Melting Completion (Liquidus)

1440 °C

Melting Onset (Solidus)

1400 °C

Specific Heat Capacity

480 J/kg-K

Thermal Conductivity

17 W/m-K

Thermal Diffusivity

4.5 mm 2 /s

Thermal Expansion

11 µm/m-K

Thermal Shock Resistance

38 points

Electrical

Electrical Conductivity: Equal Volume

2.3 % IACS

Electrical Conductivity: Equal Weight (Specific)

2.6 % IACS

Calculated

PREN (Pitting Resistance)

Resilience: Ultimate (Unit Rupture Work)

140 MJ/m 3

Resilience: Unit (Modulus of Resilience)

2910 kJ/m 3

Stiffness to Weight: Axial

14 points

Stiffness to Weight: Bending

25 points

Strength to Weight: Axial

41 points

Strength to Weight: Bending

31 points

Environmental

Base Metal Price

14 % relative

Embodied Carbon

2.7 kg CO 2 /kg material

Embodied Energy

39 MJ/kg

Embodied Energy

39 MJ/kg 17 x 10 3 BTU/lb

Embodied Water

130 L/kg

Embodied Water

130 L/kg 16 gal/lb

Registered Designations & Aliases

17-4 PHAlloy 630S17400UNS S17400 (17-4 PH, Alloy 630) Stainless Steel

Standards

ASTM A276 ASTM A276: Standard Specification for Stainless Steel Bars and Shapes

ASTM A564 ASTM A564: Standard Specification for Hot-Rolled and Cold-Finished Age-Hardening Stainless Steel Bars and Shapes

ASTM A564 ASTM A564: Standard Specification for Hot-Rolled and Cold-Finished Age-Hardening Stainless Steel Bars and Shapes Sintering of Advanced Materials: Fundamentals and Processes, Zhigang Zak Fang (editor), 2010 ASTM A276: Standard Specification for Stainless Steel Bars and Shapes Welding Metallurgy and Weldability of Stainless Steels, John C. Lippold and Damian J. Kotecki, 2005 ASTM A959: Standard Guide for Specifying Harmonized Standard Grade Compositions for Wrought Stainless Steels Properties and Selection: Irons, Steels and High Performance Alloys, ASM Handbook vol. 1, ASM International, 1993 Corrosion of Stainless Steels, A. John Sedriks, 1996

ASTM A959 ASTM A959: Standard Guide for Specifying Harmonized Standard Grade Compositions for Wrought Stainless Steels