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E4 Application: carbide geological mining tools①
Category Type Steel grade Standard Country
Grades Special Alloy E4 JIS Japan

Chemical composition % of the ladle analysis of grade E4

W(%) Co(%)
87-92 8-13
E4
Hardness quartile HRA: 87
Bending strength frequency/MPa: 1667
Mechanical properties of grade E4
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)
188 (≥) 671 (≥) 23 23 13 Solution and Aging, Annealing, Ausaging, Q+T,etc 214
Physical properties of grade E4
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
622 (≥) 666 (≥) 11 13 11 Solution and Aging, Annealing, Ausaging, Q+T,etc 433
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
581 139 851
E4 Range of products
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
Rene 41 JIS Japan
These products have been used typically for parts requiring high strength up to 1600 °F (871 °C) and oxidation resistance up to 1800 °F (982 °C), but usage is not limited to such applications
A 240 S41008 JIS Japan
Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications
A 473 S41008 JIS Japan
Stainless Steel Forgings
A 554 S41008 JIS Japan
Welded Stainless Steel Mechanical Tubing
A 815 CRS41008 JIS Japan
Wrought Ferritic, Ferritic/Austenitic, and Martensitic Stainless Steel Piping Fittings
A 815 WPS41008 JIS Japan
Wrought Ferritic, Ferritic/Austenitic, and Martensitic Stainless Steel Piping Fittings
S41008 JIS Japan
Martensitic Chromium Stainless Steel (Hardenable by Heat Treatment, Low Carbon)
SA-240 S41008 JIS Japan
Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications
SA-815 CRS41008 JIS Japan
Specification for Wrought Ferritic, Ferritic /Austenitic, and Martensitic Stainless Steel Piping Fittings
SA-815 WPS41008 JIS Japan
Specification for Wrought Ferritic, Ferritic /Austenitic, and Martensitic Stainless Steel Piping Fittings
A 276 S41040 JIS Japan
Stainless Steel Bars and Shapes
S41040 JIS Japan
Martensitic Chromium Stainless Steel with Columbium
A 176 S41050 JIS Japan
Stainless and Heat-Resisting Chromium Steel Plate, Sheet, and Strip
A 240 S41050 JIS Japan
Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications
A 959 S41050 JIS Japan
Standard Guide for Specifying Harmonized Standard Grade Compositions for Wrought Stainless Steels
S41050 JIS Japan
Ferritic Chromium Stainless Steel with Nickel
SA-240 S41050 JIS Japan
Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications
A 565 S41800 JIS Japan
Martensitic Stainless Steel Bars for High-Temperature Service
S41800 JIS Japan
Martensitic Chromium Wolfram Nickel Stainless and Heat Resisting Steel
A 582 S42023 JIS Japan
Standard Specification for Free-Machining Stainless Steel Bars

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