Product Description
Steel 17-4 PH Stainless Steel is a martensitic precipitation- hardening steel that provides an outstanding combination of high strength, corrosion resistance, good mechanical properties at temperatures up to 600 °F (316 °C), toughness in both ba metal a nd welds, and short-time, low-temperature heat treatments that minimize warpage and scaling.
*ASTM A693 requirements call for Niobium plus Tantalum = 0.15 - 0.45.
AVAILABLE FORMS
Steel 17-4 PH Stainless Steel is produced in sheet and strip thickness from 0.015 – 0.125 in. (0.38 – 3.18 mm). In the forms, the alloy is supplied in Condition A, ready for fabrication and subquent hardening by the ur. Since the material transforms to martensite on cooling to room temperature, flatness requirements should be considered and discusd as part of the order.
SPECIFICATIONS
The following specifications are listed without revision indications. Contact ASTM Headquarters for latest ASTM revision. For AMS revision, contact AMS Division of SAE.whores
AMS 5604 Sheet, Strip and Plate ASTM A693 Plate, Sheet and Strip
三年级上册英语视频(Listed as Grade 630 - UNS S17400)
The values shown in this bulletin were established in U.S. customary units. The metric equivalents may be approximate.
Standard Heat Treatments
As supplied from the mill in Condition A, Steel 17-4 PH Stainless Steel can be heat treated at a varie
ty of temperatures to develop a wide range of properties. Eight standard heat treatments have been developed. The following chart outlines the times and temperatures required.
This alloy exhibits uful mechanical properties in Condition A. Tests conducted at an expod marine atmosphere on a 80 ft. (24.4 m) lot, 82 ft. (25 m) from the waterline, show excellent stress corrosion
resistance. Condition A material has been ud successfully in numerous applications. The hardness and tensile properties fall within the range of tho for Conditions H 1100 and H 1150.
However, in critical applications, the alloy is ud in the precipitation- hardened condition, rather than Condition A. Heat treating to the hardened condition, especially at the higher end of the temperature range, stress relieves the structure and may provide more reliable resistance to stress corrosion cracking than in Condition A.
TABLE 1 – STANDARD HEAT TREATMENTS
taxerCondition A Solution Treated at 1900 °F ± 25 °F (1038 °C ± 14 °C) or Air cool below 90 °F (32 °C).
H 900900 °F (482 °C)1Air
H 925925 °F (496 °C)4Air
H 10251025 °F (551 °C)4Air
H 10751075 °F (580 °C)4Air
H 11001100 °F (593 °C)4Air
H 11501150 °F (621 °C)4Air
H 1150 + 11501150 °F (621 °C)
1150 °F (621 °C)
made4
followed by
4
Air
Air
H 1150-M
1400 °F (760 °C)
1150 °F (621 °C)
2
followed by
4grandparents
Air
Air
Mechanical Properties
Steel 17-4 PH Stainless Steel provides excellent mechanical properties. For applications requiring high strength and hardness plus corrosion resistance, this alloy is an outstanding choice.
In addition, it is more cost effective than many high-nickel, non-ferrous alloys.
TABLE 2 – TYPICAL MECHANICAL PROPERTIES
UTS, ksi. (MPa)160(1103)200(1379)190(1310)170(1172)165(1138)150(1034)137(945)
0.2% YS, ksi. (MPa)115(793)185(1275)175(1207)165(1138)160(1103)130(896)111(765)
Elongation,
刺猬的英文
59910111217 % in 2" (50.8 mm)
Rockwell Hardness, C35454338373331 TABLE 3 – PROPERTIES ACCEPTABLE FOR MATERIAL SPECIFICATION*
UTS, ksi. (MPa)185 max.(1276)190 min.(1310)170 min.(1172)155 min.(1069)145 min.(1000)140 min.(965)135 min.(931)
0.2% YS, ksi. (MPa)160 max.(1103)170 min.(1172)155 min.(1069)145 min.(1000)125 min.(862)115 min.(790)105 min.(724)
Elongation,
3 min. 5 min. 5 min. 5 min. 5 min. 5 min.8 min.
% in 2" (50.8 mm)
Rockwell Hardness, C38 max.40 – 4838 – 4635 – 4331 – 4031 – 4028 – 38
*Sheets and strip.
TABLE 4 – PIN BEARING PROPERTIES OF SHEET*
H 925273 (1882)304 (2096)308 (2124)401 (2765)190 (1310)191 (1317)
H 1025242 (1669)270 (1862)288 (1986)359 (2475)172 (1186)172 (1186)
H 1100233 (1606)257 (1772)262 (1806)337 (2324)160 (1103)160 (1103)
H 1150203 (1400)234 (1613)236 (1627)313 (2158)146 (1007)150 (1034)
A211 (1455)226 (1558)276 (1903)296 (2041)158 (1089)158 (1089)
*Average of duplicate tests on one heat of 0.065 in. (1.65 mm) sheet material.
** Offt equals 2% of pin diameter.
陕西培训
*** Yield equals ultimate tensile strengths due to rounding.jealous是什么意思
†e/D = Distance from edge of specimen to edge of hole + hole diameter.宵禁令是什么意思
Mechanical Properties
ELEVATED TEMPERATURE PROPERTIES
Mechanical properties of Steel 17-4 PH Stainless Steel Condition
H 1150 after long-time exposure at elevated temperatures are shown in Table 4. When tested at room temperature after exposure, a slight loss of toughness and gain in strength can be noted. However, H 1150 properties can be restored by heat treating at 1150 °F (621 °C) for four hours after original exposure. By taking advantage of this re-aging treatment, the rvice life of parts expod at elevated temperature to 750 °F (339 °C) can be extended indefinitely.
intenElevated temperature properties for short-time exposures were determined for Conditions H 900 and H 1150. Specimens were heated rapidly by resistance methods and reached exposure temperatures within two conds. Specimens were then held at temperature for the times indicated and tested both at exposure temperature and at room temperature. (See Tables 6, 7 and 8).
TABLE 5 –EFFECT OF ELEVATED TEMPERATURE EXPOSURE ON MECHANICAL PROPERTIES –CONDITION H 1150
*Re-aged at 1150 °F (621 °C) for 4 hours after exposure.
Mechanical Properties
TABLE 6 – EFFECT OF SHORT-TIME ELEVATED TEMPERATURE EXPOSURE ON MECHANICAL PROPERTIES – CONDITION H 900 TESTED AT ROOM TEMPERATURE
Control Sample: UTS, 215. 9 ksi. (1489 MPa)
0.2% YS,196 ksi. (1352 MPa)
Elong., % in 2" (50.8 mm) – 8.5
TABLE 7 –EFFECT OF SHORT-TIME EXPOSURE AT 1400 °F (760 °C) ON MECHANICAL PROPERTIES – CONDITION H 1150
Control Sample: UTS, 157 ksi. (1082 MPa)
0.2% YS, 143 ksi. (986 MPa)
Elong., % in 2" (50.8 mm) – 12.0
