1.7103

Official Test Certificate: issued by TUV - SGS -  BV
TECHNICAL SPECIFICATION DATASHEET - DIN 1.7103
MATERIAL TYPE - Spring Steel
MATERIAL STANDARDS - DIN 17221
CHEMICAL COMPOSITION (WEIGHT %)
C (％):     0.62 ~ 0.72
Si (％):    1.20 ~ 1.40
Mn (％):   0.40 ~ 0.60
P (％)≤:   0.035
S (％)≤:   0.035
Cr (%):    0.40 ~ 0.60
Mo (%):   -
V (%):     -
MECHANICAL PROPERTIES UNDER ROOM TEMP.
Range of size/mm|flat bar: 20
Range of size/mm|round bar: 40
Mechanical property ≥|σb/MPa:  1470～1670
Mechanical property ≥|σs/MPa:  1320
Mechanical property ≥|δ5(%):     5
Mechanical property ≥|ψ(%):      20
Mechanical property ≥|Akv /J:     14
HOT WORKING & HEAT TREATMENT
Hot working temperature /℃:                             1050~850
Thermal forming temperature /℃:                       900~820
Heat treatment temperature/℃|annealing /℃:      640～680
Heat treatment temperature/℃|normalizing /℃:   850~880
Heat treatment temperature/℃|quenching /℃:     830～860 Oil
Heat treatment temperature/℃|tempering /℃:     430～500
Hardness after annealing ≤HBW:                          240
PRODUCT PROFILE & DIMENSIONS
Round bar / Wire rod (Diameter): 5.5mm to 450mm
Square bar / Flat bar: 3mm to 610mm
Length: Fixed length or random length or based on the customer's special requirement.
Heavy/middle plate via hot rolled: T6 - 200mm X W1000- 2500mm X L1000-12000mm
Forging piece: stepped shafts with flanks / discs /tubes /slugs /donuts /cubes /other different shapes based on OEM.  
TECHNICAL SALES ASSISTANCE
If you meet further on any technical enquiry, pleased to EMAIL our resident team of qualified production engineers, Email us: sales@cnlhss.com