PRODUCT NAME : C45 Carbon steel.( forged / rolled )
STANDARD:
GB/T699-1999 EN10083-2 ISO683-1 EN10250-2
GRADE COMPARISION:

ULTRASONIC STANDARD:
GB/T6402-2008 / SEP921-84. ASTM A388
CHEMICAL COMPOSITION:

HEAT TREATMENT SPECIFICATION AND MECHANICAL PROPERTIES:

Tensile strength σb (MPa)≥715,

Yeild strength  σs (MPa)≥420,

englongation δ5 (%)≥9

Reduction area  ψ (%)≥30,

Hardness HBS ≤269;

MANUFACTURING TECHNIQUE: 

EAF+LF+VD +forged/ rolled
DELIVERY CONDITION :rolled / forged slowly cooling .
SURFACE : BLACK / GRINDING / PEELING
DIMENSION : mm
Forged round bar :dia 80-750mm
Rolled round bar :dia 8-250mm
Coild rod : dia 5.5-20mm
Wire : dia 0.2-13mm
Rolled flat bar :thickness 5-90× width 44-300mm
Forged flat bar:thickness 120-800×width 120-800
length : forged bar free length 3-5.8M,rolled bar 5.8M. for customers special requirment, the bar length can do 20 meters long.
Tolerance on diameter of forged bar : black surface -0/+5mm, peeled surface -0/+3mm.
REMARK:
Above listed parameters and sepcification only for reference . Specific parameters according to standard. Requirments beyond standard will be negotiate by both sides .
Delivery state:normalized ,annealed, spheroidal annealed, quenched & tempered ,bright bar, cold-drawn, etc. Should be indicated in contract .
Listed specifications are only typical grades; products of required specifications can be developed/produced per international, Chinese or industry standards, or based
on agreements with customers.
Packing :
Forged bar , rolled bar and coil packing in loose . Rolled wire packing in plastic woven cloth or wooden case.
APPLIED RANGE:

uitable to make round ,square spiral spring which section not big, strength requirement not high. Such as flat plate spring and round spiral spring used in vehicle tractor or train to bear vibratory .