17-4 PH Condition A

17-4 PH is a chromium-nickel grade of stainless that may be hardened by a single low temperature precipitation-hardening heat treatment. Excellent mechanical properties at a high strength level may be obtained by such treatment. Scaling and distortion is minimized. 17-4 PH should not be used in the solution treated condition. The strength and corrosion resistance properties of 17-4 hold up well is service temperatures up to 800° F. Fabrication techniques for this steel is similar to those established for the regular stainless grades. 17-4 machines well, has excellent welding characteristics, and forges easily. The combination of good mechanical and processing properties makes this grade adaptable to a wide range of uses.-Online

ANALYSIS

Carbon (C)

Max

Manganese (Mn)

Max

Silicon (Si)

Max

Chromium (Cr)Nickel (Ni)Copper (Cu)Phosphorus (P)

Max

Sulfur (S)

Max

0.0711165-17.53-53-50.040.3

17-4 stainless generally conforms to ASTM A564 Type 630 AMS 5643

MECHANICAL PROPERTIES

ConditionTensile Strength (PSI)Yield Strength (PSI)Shear Strength (PSI)Elongation in 2" Hardness
A (annealed)150,000110,000104034
H900 (hardened at 900° F)200,000185,000145044
H1150 (hardened at 1150° F)145,000125,000196033

The above values are average and may be considered as representative of 17-4 stainless

APPLICATIONS

17-4 is used where high strength and good corrosion resistance are required, as well as for applications requiring high fatigue strength, good resistance to galling, seizing and stress corrosion. Suitable for intricate parts requiring extensive machining and welding, and/or where distortion in conventional heat treatment is a problem. The corrosion resistance of 17-4 is superior to that of hardenable straight chromium grades such as 416. It approaches the corrosion resistance of the non-magnetic chromium-nickel grades. Corrosion resisting properties will be affected by such conditions as surface finish and aging heat treatment. Common applications include uses in aircraft and gas turbines, nuclear reactors, paper mills, oil field industry, and chemical process components.

MACHINEABILITY AND WELDABILITY

Machinability in the annealed condition is rated at 48% of B1112. Average cutting speed 80 ft/min. 17-4 is readily weldable by all the conventional processes. Preheating and post-heating practices used for the standard hardenable stainless grades are not required. 17-4 can be forged between 2050°-2150° F. Do not forge below 1850° F. Forgings are air cooled to 90° F or lower.

HEAT TREATING

Condition H 900° - 900° F for 1 hour, air cool. Rockwell C 44 average
Condition H1025°- 1025° F for 4 hours, air cool. Rockwell C 38 average
Condition H1150°- 1150° F for 4 hours, air cool. Rockwell C 33 average
Annealing (Condition A)
The annealing (solution treatment) temperature is 1900° F, followed by air cooling. Maximum Brinell hardness at mid-radius is 363.

TOLERANCES

ROUND (drawn, smooth turned, or ground)

size (inches)

OVER

UNDER

.044 to 5/16, incl

0.001

0.001

5/16 to 1/2, excl

0.0015

0.0015

1/2 to 1, excl

0.002

0.002

1 to 1-1/2, excl

0.0025

0.0025

1-1/2 to 4, incl

0.003

0.003

4-1/8 to 4-1/2, incl

0.005

0.005

4-9/16 to 6, incl

0.008

0.008

                                                                             

SPEEDY METALS ITEMS

5/32" {A} Rd 17-4 Precipitation Hardening (Type 630) Stainless Steel 3/16" {A} Rd 17-4 Precipitation Hardening (Type 630) Stainless Steel 1/4" {A} Rd 17-4 Precipitation Hardening (Type 630) Stainless Steel
5/16" {A} Rd 17-4 Precipitation Hardening (Type 630) Stainless Steel 3/8" {A} Rd 17-4 Precipitation Hardening (Type 630) Stainless Steel 7/16" {A} Rd 17-4 Precipitation Hardening (Type 630) Stainless Steel
1/2" {A} Rd 17-4 Precipitation Hardening (Type 630) Stainless Steel 5/8" {A} Rd 17-4 Precipitation Hardening (Type 630) Stainless Steel 3/4" {A} Rd 17-4 Precipitation Hardening (Type 630) Stainless Steel
7/8" {A} Rd 17-4 Precipitation Hardening (Type 630) Stainless Steel 1" {A} Rd 17-4 Precipitation Hardening (Type 630) Stainless Steel 1-1/8" {A} Rd 17-4 Precipitation Hardening (Type 630) Stainless Steel
1-1/4" {A} Rd 17-4 Precipitation Hardening (Type 630) Stainless Steel 1-3/8" {A} Rd 17-4 Precipitation Hardening (Type 630) Stainless Steel 1-1/2" {A} Rd 17-4 Precipitation Hardening (Type 630) Stainless Steel
1-3/4" {A} Rd 17-4 Precipitation Hardening (Type 630) Stainless Steel 2" {A} Rd 17-4 Precipitation Hardening (Type 630) Stainless Steel 2-1/4" {A} Rd 17-4 Precipitation Hardening (Type 630) Stainless Steel
2-1/2" {A} Rd 17-4 Precipitation Hardening (Type 630) Stainless Steel 2-3/4" {A} Rd 17-4 Precipitation Hardening (Type 630) Stainless Steel 3" {A} Rd 17-4 Precipitation Hardening (Type 630) Stainless Steel
3-1/4" {A} Rd 17-4 Precipitation Hardening (Type 630) Stainless Steel 3-1/2" {A} Rd 17-4 Precipitation Hardening (Type 630) Stainless Steel 3-3/4" {A} Rd 17-4 Precipitation Hardening (Type 630) Stainless Steel
4" {A} Rd 17-4 Precipitation Hardening (Type 630) Stainless Steel 4-1/4" {A} Rd 17-4 Precipitation Hardening (Type 630) Stainless Steel 4-1/2" {A} Rd 17-4 Precipitation Hardening (Type 630) Stainless Steel
4-3/4" {A} Rd 17-4 Precipitation Hardening (Type 630) Stainless Steel 5" {A} Rd 17-4 Precipitation Hardening (Type 630) Stainless Steel 5-1/4" {A} Rd 17-4 Precipitation Hardening (Type 630) Stainless Steel
5-1/2" {A} Rd 17-4 Precipitation Hardening (Type 630) Stainless Steel 5-3/4" {A} Rd 17-4 Precipitation Hardening (Type 630) Stainless Steel 6" {A} Rd 17-4 Precipitation Hardening (Type 630) Stainless Steel
6-1/4" {A} Rd 17-4 Precipitation Hardening (Type 630) Stainless Steel 6-1/2" {A} Rd 17-4 Precipitation Hardening (Type 630) Stainless Steel 6-3/4" {A} Rd 17-4 Precipitation Hardening (Type 630) Stainless Steel
7" {A} Rd 17-4 Precipitation Hardening (Type 630) Stainless Steel 7-1/2" {A} Rd 17-4 Precipitation Hardening (Type 630) Stainless Steel 8" {A} Rd 17-4 Precipitation Hardening (Type 630) Stainless Steel
9" {A} Rd 17-4 Precipitation Hardening (Type 630) Stainless Steel 10" {A} Rd 17-4 Precipitation Hardening (Type 630) Stainless Steel 11" {A} Rd 17-4 Precipitation Hardening (Type 630) Stainless Steel
12" {A} Rd 17-4 Precipitation Hardening (Type 630) Stainless Steel