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SAE L4 Details

Low Alloy Tool Steel

SAE L4 Standard Download

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L4 Application:Low Alloy Tool Steel
Category Type Grade Designations
Grades Tool Steels & Die Steels L4 USA - SAE ,
Chemical composition(mass fraction)(wt.%)
Elements Min.(≥) Max.(≤)
C 0.90 1.10
Si 0.10 0.40
Mn 0.50 0.70
Cr 1.45 1.55
Mo - -
V 0.20 0.30
W - -
Mechanical properties of grade L4
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)
294 (≥) 366 (≥) 22 12 31 Solution and Aging, Annealing, Ausaging, Q+T,etc 231
Physical properties of grade L4
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
698 (≥) 619 (≥) 33 23 22 Solution and Aging, Annealing, Ausaging, Q+T,etc 322
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
241 185 348
L4 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
EVl4 UNS USA
Steel for exhaust valves
15X17AΓl4 GOST Russia
Russia GOCT standard stainless steel and heat resistant steel steel grade and chemical composition
12X17P9AHl4 GOST Russia
Russia GOCT standard stainless steel and heat resistant steel steel grade and chemical composition
L4 SAE USA
Low Alloy Tool Steel

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