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1b Application:Structural steel
Category Type Steel grade Standard Country
Grades Special Alloy 1b STAS/SR Romania

Chemical composition % of the ladle analysis of grade 1b

C(%) Si(%) Mn(%) P(%) S(%) Cr(%) Ni(%) Cu(%)
0.12-0.20 0.15-0.35 0.40-0.70 0.040 0.040 0.30 Max 0.30 0.30
1b
Mechanical properties of grade 1b
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)
523 (≥) 542 (≥) 32 24 12 Solution and Aging, Annealing, Ausaging, Q+T,etc 413
Physical properties of grade 1b
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
833 (≥) 576 (≥) 31 13 24 Solution and Aging, Annealing, Ausaging, Q+T,etc 313
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
144 327 958
1b 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
A 1018 HSLAS Grade 65 [450] Class 1 B STAS/SR Romania
Steel, Sheet and Strip, Heavy-Thickness Coils, Hot-Rolled, Carbon, Commercial, Drawing, Structural, High-Strength Low-Alloy, High-Strength Low-Alloy with Improved Formability, and Ultra-High Strength Steel
A 501 Grade B STAS/SR Romania
Hot-Formed Welded and Seamless Carbon Steel Structural Tubing
XH51BMTЮ/KΦK-BД STAS/SR Romania
Russia GOCT standard deformation of high temperature alloy grades and chemical composition
XH51BMTЮKΦP(ЭП220) STAS/SR Romania
Russia GOCT standard deformation of high temperature alloy grades and chemical composition
AISI501B STAS/SR Romania
AISI501B

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