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SAE T7 Details

High-Speed Tool Steel

SAE T7 Standard Download

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T7 Application:High-Speed Tool Steel
Category Type Grade Designations
Grades Tool Steels & Die Steels T7 USA - SAE ,
Chemical composition(mass fraction)(wt.%)
Elements Min.(≥) Max.(≤)
C 0.70 0.75
Si 0.20 0.40
Mn 0.20 0.40
Cr 4.50 5.00
Mo - -
V 1.50 1.80
W 13.50 14.50
Mechanical properties of grade T7
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)
339 (≥) 124 (≥) 32 34 13 Solution and Aging, Annealing, Ausaging, Q+T,etc 313
Physical properties of grade T7
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
971 (≥) 514 (≥) 13 11 42 Solution and Aging, Annealing, Ausaging, Q+T,etc 112
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
846 451 916
T7 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
T72301 AISI USA
Carbon tool steel products which include hot or cold finished bar, plate, sheet, rod, wire, or forgings, which are normally fabricated into tools, dies, or fixtures.
W2-A SAE USA
Carbon tool steel products which include hot or cold finished bar, plate, sheet, rod, wire, or forgings, which are normally fabricated into tools, dies, or fixtures.
T72302 AISI USA
Carbon tool steel products which include hot or cold finished bar, plate, sheet, rod, wire, or forgings, which are normally fabricated into tools, dies, or fixtures.
T72305 AISI USA
Carbon tool steel
Udimet 700 SAE USA
Special Purpose Alloys ("Superalloys")
T7 SAE USA
High-Speed Tool Steel

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