Product : AISI 630 Stainless Steel
Kategori : Martensitic Precipitation Hardening Stainless Steel
Standard: AISI
Grades : 630
Equivalents
AISI | JIS | UNS | No | Euronorm | China GB | BS |
630 | SUS 630 | S17400 | 1.4542 | X5CrNiCuNb16-4 | 0Cr17Ni4Cu4Nb | – |
631 | SUS 631 | S17700 | 1.4568 | X7CrNiAl17-7 | – | 460S52 |
AISI 630
Availability
Roundbar
Chemical Composition (%)
C | Si | Mn | P | S | Cr | Ni | Cu | Nb | Mo |
0.04 Max | 0.40 Max | 0.80 Max | 0.040 Max | 0.030 Max | 15.00-17.50 | 3.00-5.00 | 3.00-5.00 | 0.15-0.45 | 0.50 Max |
PREN (%Cr+3.3%Mo+16%N) ≥17 |
Mechanical Properties
Heat treatment | YS 0.2% N/mm_ |
UTS N.mm_ |
YS 0.2% ksi |
UTS ksi |
EI% | ||||||
Min. | Typ. | Min. | Typ. | Min. | Typ. | Min. | Typ. | Min. | Typ. | ||
A | 1070 | 1207 | 1170 | 1310 | 155 | 175 | 170 | 190 | 8 | 14 | |
B | 790 | 931 | 965 | 1034 | 115 | 135 | 140 | 150 | 10 | 17 |
A: hardening 496°C (925°F) – 4 hours – air cooling
B: hardening 593°C (1100°F) – 4 hours – air cooling
2 examples of heat treatments that may be applied.
Tensile strength at delivery form approx 800-110 N/mm2
Very high yield strength up to 1100-1300 MPa (160-190 ksi) can be achieved.
Elevated temperature properties
Minimum guaranteed values following EN 10088 hot rolled plates.
The EN guaranteed values are valid for a thickness from 3/16″ up to 3″.
Temperature °C Temperature °F |
100 212 |
150 302 |
200 392 |
250 482 |
300 572 |
|
YS 0.2% | N/mm_ | 730 | 710 | 690 | 670 | 650 |
ksi | 106 | 103 | 100 | 97 | 95 |
Heat treatment : hardening 590°C (1094°F) – 4 hours – air cooling.
1 example of heat treatments that may be applied
Impact Values
Minimum guaranteed values following ASTM A693 hot rolled plates.
The ASTM guaranteed values are valid for a thickness from 3/16″ up to 3″.
Heat treatment | KV transverse | |
J | ft.lbf | |
Hardening 593°C (1100°F) – 4 hours – air cooling | 20 | 15 |
Hardness
Minimum guaranteed values following ASTM A693 hot rolled plates.
The ASTM guaranteed values are valid for a thickness from 3/16″ up to 3″.
Heat treatment | Hardness | |
Rockwell | Brinell | |
Hardening 496°C (925°F) – 4 hours – air cooling | C38 | 375 |
Hardening 593°C (1100°F) – 4 hours – air cooling | C29 | 293 |
Corrosion Resistance
Stainless AISI 630 withstands corrosive attacks better than any of the standard hardenable stainless steels and is comparable to type 304 in most media.
If there are potential risks of stress corrosion cracking, the higher aging temperatures then must be selected over 550°C (1022°F), preferably 590°C (1094°F). 550°C-1022°F is the optimum tempering temperature in chloride media.
590°C-1094°F is the optimum tempering temperature in H2S media.
AISI630 is subject to crevice or pitting attack if exposed to stagnant seawater for any length of time.
It is corrosion resistant in some chemical, petroleum, paper, dairy and food processing industries (equivalent to 304L grade).
Physical Properties
Have been obtained after hardening 480°C (896°F) – 1 hour – air cooling.
Interval Temperature °C |
Thermal expansion ax10-6°C-1 |
°C | °F | Thermal conductivity (W.m-1.K-1) |
Young modulus (GPa) |
0-100 | 10.8 | 20 | 68 | 14 | 197 |
0-200 | 11 | 100 | 212 | 16 | 193 |
0-300 | 11.3 | 200 | 392 | 18.5 | 186 |
0-400 | 11.6 | 300 | 572 | 20 | 180 |
0-500 | 12 | 400 | 752 | 22 | 175 |
500 | 932 | 23 | 170 |
Properties (Room temp) | 17-4PH | |
Resistivity (µ_.cm) | 80 | |
Specific heat (J.kg-1.K-1) | 460 | |
Tension modulus (GPa) | 77 | |
Density kg/m3 (.28 lbs/in3) | 7800 |
Heat Treatment
Hardening condition P800 or P930 has to be solution annealed before hardening Max obtainable hardness 44 HRC (for more details please turn over)
Martensitic transformation
Indicative values
Ms : 130°C (266°F)
Mf : 30°C (86°F)
Solution annealing
1050°C +/-25°C (1925°F+ /-50°F) – 30 min up to 1 hour.
air cooling / oil quenching below 25°C (76°F)
Tempering
The highest mechanical properties are obtained with the following heat treatment: 480°C (896°F) – 1 hour – air cooling.
Higher ductilities are obtained when using higher aging temperatures up to 620°C (1148°F).
Applications
Offshore (foils, helicopter deck platforms, etc.)
Food industry
Pulp and paper industry.
Aerospace (turbine blades, etc.)
Mechanical components
Nuclear waste barrel
Parts used in Chemical process
Parts used in Mechanical process
Aircraft & gas turbines
Paper mills & oil fields
Referensi:
http://www.sandmeyersteel.com/17-4PH-spec.html
http://www.quantumalloys.com/data/ground/cro17-4.html
http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/20070034041
http://www.sciencedirect.com
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