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SAE L7 Details

Low Alloy Tool Steel

SAE L7 Standard Download

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L7 Application:Low Alloy Tool Steel
Category Type Grade Designations
Grades Tool Steels & Die Steels L7 USA - SAE ,
Chemical composition(mass fraction)(wt.%)
Elements Min.(≥) Max.(≤)
C 0.95 1.05
Si 0.20 0.40
Mn 0.25 0.45
Cr 1.25 1.75
Mo 0.30 0.50
V - -
W - -
Mechanical properties of grade L7
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)
336 (≥) 167 (≥) 43 33 24 Solution and Aging, Annealing, Ausaging, Q+T,etc 341
Physical properties of grade L7
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
457 (≥) 443 (≥) 23 44 44 Solution and Aging, Annealing, Ausaging, Q+T,etc 443
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
667 269 511
L7 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
EVll UNS USA
Steel for exhaust valves
S63011 AISI USA
Steel for exhaust valves
EVl7 UNS USA
Steel for exhaust valves
HEV2 UNS USA
Steel for exhaust valves
N07002 AISI USA
Steel for exhaust valves
L7 SAE USA
Low Alloy Tool Steel

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