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Carpenter Custom 630 (17-Cr-4Ni) Precipitation Hardening Stainless Steel, Condition H 900 (Age-Hardened 482°C/1hr/AC)
Categories: Metal; Ferrous Metal; Stainless Steel; Precipitation Hardening Stainless; T S10000 Series Stainless Steel
Material Notes: Data provided by Carpenter Technology Corporation.

Custom 630 (17Cr-4Ni) is a martensitic precipitation/age-hardening stainless steel offering high strength and hardness along with excellent corrosion resistance. It has good fabricating characteristics and can be age hardened by a single-step, low temperature treatment. It has been used for a variety of applications including oil field valve parts, chemical process equipment, aircraft fittings, fasteners, pump shafts, nuclear reactor components, gears, paper mill equipment, missile fittings, and jet engine parts. Project 70® stainless Custom 630 is an improved machinability modification.
Key Words: AISI 630; UNS S17400; 17-4PH, 17/4PH, 17-4 PH, Precipitation Hardening PH Stainless Steel, 17-4
Vendors: Visit metalmen for your metals needs. Products include special chemistry, tight tolerances, custom tempers, odd dimensions/forms, and small quantities. Phone 1-800-767-9494.

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Physical PropertiesOriginal ValueComments
Density 7.80 g/cc
 
Mechanical PropertiesOriginal ValueComments
Hardness, Brinell 420
Hardness, Knoop 450Estimated from Rockwell C
Hardness, Rockwell C 44
Hardness, Vickers 430Estimated from Rockwell C
Tensile Strength, Ultimate 1365 MPa
 793 MPa
@Temperature 538 °C
 952 MPa
@Temperature 482 °C
 1103 MPa
@Temperature 427 °C
 1186 MPa
@Temperature 316 °C
Tensile Strength, Yield 1262 MPa
@Strain 0.2 %
 643 MPa
@Strain 0.2 %,
Temperature 538 °C
 814 MPa
@Strain 0.2 %,
Temperature 482 °C
 910 MPa
@Strain 0.2 %,
Temperature 427 °C
 1000 MPa
@Strain 0.2 %,
Temperature 316 °C
Elongation at Break 15 %In 50 mm
 13 %
@Temperature 427 °C		In 50 mm
 13 %
@Temperature 316 °C		In 50 mm
 13 %
@Temperature 482 °C		In 50 mm
 17 %
@Temperature 538 °C
Reduction of Area 52 %
 46 %
@Temperature 316 °C
 51 %
@Temperature 427 °C
 52 %
@Temperature 538 °C
 55 %
@Temperature 482 °C
Modulus of Elasticity 197 GPa
Poissons Ratio 0.272
Shear Modulus 77.4 GPaCalculated
Charpy Impact 21.0 JV-notch
 
Electrical PropertiesOriginal ValueComments
Electrical Resistivity 0.0000770 ohm-cm
 
Thermal PropertiesOriginal ValueComments
CTE, linear 10.8 µm/m-°C
@Temperature 21.0 - 93.0 °C
 11.3 µm/m-°C
@Temperature 21.0 - 316 °C
 11.7 µm/m-°C
@Temperature 21.0 - 427 °C
Specific Heat Capacity 0.419 J/g-°C
@Temperature 0.000 - 100 °C		condition H 900
Thermal Conductivity 17.9 W/m-K
@Temperature 149 °C		condition H 900
 22.6 W/m-K
@Temperature 482 °C		condition H 900
 
Component Elements PropertiesOriginal ValueComments
Carbon, C <= 0.070 %
Chromium, Cr 15 - 17.5 %
Copper, Cu 3.0 - 5.0 %
Iron, Fe 73 %as remainder
Manganese, Mn <= 1.0 %
Nb + Ta 0.15 - 0.45 %
Nickel, Ni 3.0 - 5.0 %
Niobium, Nb (Columbium, Cb) <= 0.45 %
Phosphorus, P <= 0.040 %
Silicon, Si <= 1.0 %
Sulfur, S <= 0.030 %
Tantalum, Ta <= 0.45 %

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NCARH5 / 15772




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