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R44 Application:Structural steel
Category Type Steel grade Standard Country
Grades Special Alloy R44 STAS/SR Romania

Chemical composition % of the ladle analysis of grade R44

C(％) Si(％) Mn(％) P(％) S(％) Cr(％) Cu(%) Al(%)
Min 0.20 0.17- 0.45 0.80-1.10 0.040 0.040 Min 0.30 0.30 Min 0.025
R44
Mechanical properties of grade R44
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 (≥) 746 (≥) 44 32 12 Solution and Aging, Annealing, Ausaging, Q+T,etc 431
Physical properties of grade R44
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
621 (≥) 557 (≥) 34 14 24 Solution and Aging, Annealing, Ausaging, Q+T,etc 332
Temp.
°C/°F		 Creep strain limit
(10000h)
(Rp1,0) N/mm2		 Creep rupture strength
(10000h)
(Rp1,0) N/mm2
975 568 923
R44 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
STR446 STAS/SR Romania
Heat - resisting steel plates and sheets

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