Alloy 17-4PH (UNS S17400), Type 630, is a chromium-nickel-copper precipitation-hardening martensitic stainless steel with an addition of niobium. 17-4PH stainless steel combines high strength and hardness with good corrosion resistance.
HT PIPE provide stainless steel 17-4PH bars, stainless steel round bars supplier in China. ss 17-4PH round bar, S17400 stainless steel hollow bar, ss 630 flat bar, 1.4542 round bar, 17-4ph stainless steel rod supplier, exporter.
Stainless steel 17-4PH FeaturesHigh tensile strength and hardness to 600°F
Corrosion resistant
Excellent oxidation resistance to about 1100°F
Creep-rupture strength to 900°F
Stainless steel 17-4PH Bar Chemical Composition
| Grade |
C |
Si |
Mn |
P |
S |
Cr |
Ni |
Cb + Ta |
Cu |
| AISI 630 |
0.07 |
1.0 max |
1.0 max |
0.04 |
0.03 |
15.0 - 17.5 |
3.0 -5.0 |
0.15 - 0.45 |
3.0 - 5.0 |
UNS N17400 Stainless steel Bar Physical Properties
| Density |
Specific Heat |
0.280 lbs/in3
7.75 g/cm3 |
0.11 BTU/lb-°F @ 70°F)
460 J/kg-°C @ 20°C) |
| Modulus of Elasticity |
Thermal Conductivity 212°F (100°C) |
28.5 x 106 psi
196 GPa |
10.6 BTU/hr/ft2/ft/°F
18.3 W/m-°K |
| Melting Range |
Electrical Resistivity |
2560 – 2625°F
1404 – 1440°C |
29.5 Microhm-in at 75°C
75 Microhm-cm at 24°C |
1.4542 17-4PH stainless steel bar Mechanical Properties
| HEAT TREATMENT |
Y.S. 0.2% |
UTS |
Elongation % |
| MPa |
ksi |
MPa |
ksi |
Hardening 496 ºC (925 ºF)
4 hours — air cooling |
Min. |
1070 |
155 |
1170 |
170 |
8 |
| Typ. |
1207 |
175 |
1310 |
190 |
14 |
Hardening 593 ºC (1100 ºF)
4 hours — air cooling |
Min. |
790 |
115 |
965 |
140 |
10 |
| Typ. |
931 |
135 |
1034 |
150 |
17 |
ApplicationsGate valves
Chemical processing equipment
Firearms production
Pump shafts, gears, plungers
Valve stems, balls, bushings, seats
Fasteners
| ASTM A564 /ASME SA564 |
Standard Specification for Hot-Rolled and Cold-Finished Age-Hardening Stainless Steel Bars and Shapes |
| Material Grade |
UNS S17400 |
UNS S17700 |
UNS S15700 |
UNS S35500 |
UNS S17600 |
| UNS S15500 |
UNS S13800 |
UNS S45500 |
UNS S45503 |
UNS S45000 |
| UNS S46500 |
|
|
|
|
| Size |
5~500mm |
| Length |
As per clients' requirements. |
| Surface |
Bright or Black |
| Application |
Foodstuff, gas, metallurgy, biology, electron, chemical, petroleum, boilers, nuclear, energy, construction field, ships building industry, war and electricity industry, boiler heat exchanger, machiner and hardware fields and medical equipment, fertilizer, etc. |
| Packing |
Standard export sea-worthy packing |
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