Q345q C

Q345q C Special Alloy

Chemical composition%of the ladle analysis of gradeQ345q C

C(％)	Si(％)	Mn(％)	P(％)	S(％)
≤0.20	≤0.60	1.00～1.60	≤0.035	≤0.035

Mechanics performance 

Steel thickness/mm: more than 16
The yield point | σ s frequency/MPa: 345
Tensile depth | σ b frequency/MPa: 510
Elongation | δ 5 frequency / (%) : 21
Impact absorption power AKV/J | testing temperature / ℃ : 0
Impact absorption power AKV/J | longitudinal frequency/J | : 34
Impact absorption power AKV/J | time frequency/J | : 34
180 ° of cold bending test | d-apex diameter, a-the following steel thickness thickness when/mm | than 16: d = 2 a
180 ° of cold bending test | d-apex diameter, a-the following steel thickness thickness when/mm | > 16: d = 3 a

Mechanical properties of gradeQ345q C

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)
638(≥)	173(≥)	23	12	23	Solution and Aging,Annealing,Ausaging,Q+T,etc	241

Physical properties of grade Q345q C

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
564(≥)	688(≥)	14	22	24	Solution and Aging,Annealing,Ausaging,Q+T,etc	411
Temp. °C/°F	Creep strain limit (10000h) (Rp1,0)N/mm2	Creep rupture strength (10000h) (Rp1,0)N/mm2
269	798	121

Q345q C 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