Similar Grades:
DIN 1.4542, 17-4PH, S17400
Shape: 
Round, Flat, Square.
Size Range:  
Steel-making Condition: 
EF, EF/EAF+LF+VD, EF/EAF+ESR
Delivery Condition:
Annealed , Quenched + Tempered

Surface Condition: 
Black, Grinded, Peeled, Rough turned, Polished

Features:

2.Immediate delivery
3.Premium quality
4.Reliable service
5.MOQ: 1 Ton
  Chemical Composition(%)  

Mechanical Properties
 
 
Heat Treatment
 
 
 
 
Heat Treatment
Solution treatment (Condition A):Grade 630 stainless steels are heated at 1040°C for 0.5 h, then air-cooled to 30°C. Small sections of these grades can be oil quenched.
Cold Working: Alloy 17-4PH has limited cold forming properties. Cold forming can only be undertaken on plates in the fully annealed condition. Stress corrosion resistance is enhanced by re-aging at the precipitation hardening temperature after cold working.
Hot Forming:Heat uniformly at 1742-2192°F (950-1200°C). A full solution anneal, cooling lower than 76°F (25°C) and aging at the required temperature must occur after
hot forming. The post forming heat treatment should be a function of the desired mechanical properties.
Annealing: 440C stainless steel is annealed at 843-871°C (1550-1600°F) followed by slowly cooling in the furnace.
Hardening: Grade 630 stainless steels are age-hardened at low temperatures to achieve the required mechanical properties. During the process, superficial discoloration occurs followed by shrinkage at 0.10% for condition H1150, and 0.05% for condition H900.
Welding: Alloy 17-4PH can be readily welded by most standard processes including SMAW, GTAW, PAW and GMAW.
Machinability: Alloy 17-4PH can be machined in both the solution treated and
precipitation hardened conditions. Machining characteristics may vary according to the hardness of the
metal. High speed tools are acceptable, but carbide tools are preferred. Standard lubrication should be used. Dimensional changes as a result heat treatment should be taken into account if very stringent tolerances are required.
 
 
Introduction:
Alloy 17-4PH (UNS S17400), Type 630, is a chromium-nickel-copper precipitation hardening martensitic stainless steel with an addition of niobium. 17-4PH combines high strength and hardness with good corrosion resistance.
The alloy is furnished in the solution annealed condition (Condition A). It should not be used at temperatures above 572F (300C) or for cryogenic service. Optimal mechanical properties can be
obtained by subjecting the alloy to age hardening heat treatments. Heat treatment in the 900F (482C) range produces the highest strength.
The corrosion resistance of Alloy 17-4PH is comparable to 304 stainless steel in most environments,
and is generally superior to the 400 series stainless steels. It is used in applications where the combination of moderate corrosion resistance and unusually high strength are required.
Alloy 17-4PH can be easily welded and processed by standard shop fabrication practices.
 
 Contact Information:
FUSHUN SPECIAL STEEL CO., LTD.