Q195 Special Alloy

Chemical composition%of the ladle analysis of gradeQ195

C(%)Si(%)Mn(%)P(%)S(%)Cr(%)Ni(%)Cu(%)
0.06~0.12≤0.300.25~0.50≤0.045≤0.050≤0.30≤0.30≤0.30

Mechanics performance


The yield point σ s/MPa (no less) than in steel different thickness or diameter/mm | ≤ 16:195
The yield point σ s/MPa (no less) than in steel different thickness or diameter/mm | > 16 ~ 40:185

Tensile strength σ b/MPa: 315 ~ 430
Elongation δ 5 / (%) (no less) than in steel different thickness or diameter/mm | than 16:33
Elongation δ 5 / (%) (no less) than in steel different thickness or diameter/mm | > 16 ~ 40:32
Elongation δ 5 / (%) (no less) than in steel different thickness or diameter/mm | > 40 to 60:-
Elongation δ 5 / (%) (no less) than in steel different thickness or diameter/mm | > 60 ~ 100:-
Elongation δ 5 / (%) (no less) than in steel different thickness or diameter/mm | > 100 ~ 150:-
Elongation δ 5 / (%) (no less) than in steel different thickness or diameter/mm | > 150:-
Impact test (1) | temperature / ℃ :-
Impact test (1) | impact absorption power AKV/J:- 

Cold bending property


Sample direction: vertical
180 ° of cold bending test b = 2 a different thickness or in steel diameter/mm | than 60:0
180 ° of cold bending test b = 2 a different thickness or in steel diameter/mm | > 60 ~ 100:-
180 ° of cold bending test b = 2 a different thickness or in steel diameter/mm | > 100 ~ 200:-

Performance characteristics and applications 


High plasticity and toughness and welding performance, good pressure processing performance, but low strength. 
Load small parts, spacers, rivets, the anchor bolt, colter, funnel, roof, low carbon steel wire, plates, welded pipe, bars, split cotters, and stamping parts, components etc. 

 

GB/T 700-1988 standard and GB 700-1979 standard steel grade comparison 

GB/T 700-1988 standadr:

Regardless of rank, the chemical composition and mechanical properties (σ s, σ b, the delta and the cold bending) are to be guaranteed

Rolling plate and rod of products, the mechanical properties of the guarantee condition, can according to product characteristics and application requirements, in the standard separately 

GB 700-1979 standard
 

A1 the mechanical properties of the steel guarantee (σ s, σ b, the delta and the cold bending), B1 steel guarantee the chemical composition of the same with Q195

A1 steel cold bending test is additional guarantee conditions

1 no special steel of steel

Mechanical properties of gradeQ195

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)
997(≥) 742(≥) 44 44 42 Solution and Aging,Annealing,Ausaging,Q+T,etc 232

Physical properties of grade Q195

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
864(≥) 666(≥) 34 12 14 Solution and Aging,Annealing,Ausaging,Q+T,etc 134
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0)N/mm2
Creep rupture strength
(10000h)
(Rp1,0)N/mm2
223 375 179

Q195 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