Q195

Q195 Special Alloy

Chemical composition%of the ladle analysis of gradeQ195

C(％)	Si(％)	Mn(％)	P(％)	S(％)	Cr(％)	Ni(％)	Cu(%)
0.06～0.12	≤0.30	0.25～0.50	≤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)
633(≥)	215(≥)	31	23	22	Solution and Aging,Annealing,Ausaging,Q+T,etc	321

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
377(≥)	226(≥)	22	31	44	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
871	869	178

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