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ASME 18-8 Type 304 Details

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18-8 Type 304 Application:Steel, corrosion resistant (18-8) plate, sheet and strip

Category Type Grade Microstructure Designations
Grades Stainless Steels 18-8 Type 304 Austenite USA - ASME , MIL-S-5059D - Steel, corrosion resistant (18-8) plate, sheet and strip

Chemical composition(wt.%) of 18-8 Type 304 grade: MIL-S-5059D

Elements Min.(≥) Max.(≤) Similar Remarks
C - 0.08
Si - 1.00
Mn - 2.00
P - 0.045
S - 0.03
Cr 18.0 20.0
Ni 8.00 10.5
N - 0.10

MIL-S-5059D Steel, corrosion resistant (18-8) plate, sheet and strip; Replaced by: SAE AMS 5513; SAE AMS 5910; SAE AMS 5911; SAE AMS 5912; SAE AMS 5913, SAE AMS 5524; SAE AMS 5516; SAE AMS 5517; SAE AMS 5518; SAE AMS 5519; SAE AMS 5901; SAE AMS 5902; SAE AMS 5903; SAE AMS 5904; SAE AMS 5905; SAE AMS 5906; SAE AMS 5907

Replaced by SAE-AMS5513, SAE-AMS5910-5913, SAE-AMS5524, SAE-AMS5516-5519, SAE-AMS5901-5907

Mechanical properties of grade 18-8 Type 304 MIL-S-5059D

Proof strength
Rp0.2 (MPa)
Tensile strength
Rm (MPa)
Impact energy
KV (J)
Elongation at fracture
A (%)
Reduction in cross section on fracture
Z (%)
As-Heat-Treated Condition Brinell hardness (HBW)
113 (≥) 594 (≥) 13 32 33 Solution and Aging, Annealing, Ausaging, Q+T,etc 141

Physical properties of grade 18-8 Type 304 MIL-S-5059D

Property Density
kg/dm3
Temperature T
°C/F
Specific heat
J / kgK
Thermal conductivity
W/mK
Electric resistance
µΩ·cm
Modulus of elasticity
kN/mm2
Expansion rate
895 (≥) 917 (≥) 23 14 31 Solution and Aging, Annealing, Ausaging, Q+T,etc 321
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
514 589 578

18-8 Type 304 - Form of Supply

Product type Products Dimension Processes Deliver Status
Plates / Sheets Plates / Sheets 0.08-200mm(T)*W*L Forging, hot rolling and cold rolling Annealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting
Steel Bar Round Bar, Flat Bar, Square Bar Φ8-1200mm*L Forging, hot rolling and cold rolling, Cast Black, Rough Turning, Shot Blasting,
Coil / Strip Steel Coil /Steel Strip 0.03-16.0x1200mm Cold-Rolled & Hot-Rolled Annealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting
Pipes / Tubes Seamless Pipes/Tubes, Welded Pipes/Tubes OD:6-219mm x WT:0.5-20.0mm Hot extrusion, Cold Drawn, Welded Annealed, Solution and Aging, Q+T, ACID-WASHED

Cross Reference Table(Equivalent Grade)

Grade Standard Country Application
GH3044 GB China
Classification and designation for superalloys and high temperature intermetallic materials
18-8 Type 304 ASME USA
Steel, corrosion resistant (18-8) plate, sheet and strip
304 UNS USA
Steel, Corrosion Resistant, Bars, Wire, Shapes, and Forgings
304 ASTM USA
Steel, Corrosion Resistant, Bars, Wire, Shapes, and Forgings
304 ASME USA
Steel plate, corrosion resistant, austenitic (UNS S30400, S30403, S31600, S34700, and S34800)
A 167 Type 304 SAE USA
Stainless and Heat-Resisting Chromium-Nickel Steel Plate, Sheet, and Strip
A 182 F 304 SAE USA
Standard Specification for Forged or Rolled Alloy and Stainless Steel Pipe Flanges, Forged Fittings, and Valves and Parts for High-Temperature Service
A 213 TP304 SAE USA
Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger Tubes
304 L YB USA
Forged or Rolled Alloy and Stainless Steel Pipe Flanges, Forged Fittings, and Valves and Parts for High-Temperature Service
304L UNS USA
Steel, Corrosion-Resistant, Sheet, Strip, and Plate 19Cr - 9.5Ni (304L) Solution Heat Treated
304L ASME USA
Tubing, steel, corrosion and heat resistant, for aerospace vehicle hydraulic systems assembled by brazing
A 167 Type 304L SAE USA
Stainless and Heat-Resisting Chromium-Nickel Steel Plate, Sheet, and Strip
A 182 F 304L SAE USA
Standard Specification for Forged or Rolled Alloy and Stainless Steel Pipe Flanges, Forged Fittings, and Valves and Parts for High-Temperature Service
A 213 TP304L SAE USA
Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger Tubes
A 240 Type 304L SAE USA
Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications
A 249 TP304L SAE USA
Welded Austenitic Steel Boiler, Superheater, Heat-Exchanger, and Condenser Tubes
A 269 TP304L SAE USA
Seamless and Welded Austenitic Stainless Steel Tubing for General Service
A 270 TP304L SAE USA
Seamless and Welded Austenitic Stainless Steel Sanitary Tubing
A 276 304L SAE USA
Stainless Steel Bars and Shapes
A 314 304L SAE USA
Stainless Steel Billets and Bars for Forging

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