U8G

U8G forging hardness (GOST 1435−99): HB 10 ^-1 = 187 MPa .

for the production of spring ribbon

Classification

Country	Section	Category
Country	Section	Category
CIS, Russia, Ukraine	Tool steel	Carbon Tool Steel

Chemical composition

Standard	Fe, %	Si, %	Mn, %	Cr, %	Cu, %	Ni, %	P, %	C, %	S, %
Standard	Fe, %	Si, %	Mn, %	Cr, %	Cu, %	Ni, %	P, %	C, %	S, %
GOST 1435-99	97.432–98.7	0.17–0.33	0.33–0.58	< 0.2	< 0.25	< 0.25	< 0.03	0.8–0.9	< 0.028

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Mechanical properties at 20 °C

Rolling	Standard	Size, mm	Tension	Classifiers	$\sigma _{U}$ , $MPa$	$\epsilon_L$ , %	Treatment
Rolling	Standard	Size, mm	Tension	Classifiers	$\sigma _{U}$ , $MPa$	$\epsilon_L$ , %	Treatment
Tape		0.08–3		annealing	750	10

Brinell hardness number

Rolling	Standard	Classifiers	Value, HBW
Rolling	Standard	Classifiers	Value, HBW
Round	GOST 1435-99		0–0

Analogues

USA	Germany	Japan	France	United Kingdom
USA	Germany	Japan	France	United Kingdom
W1-8	1.1525 (C80W1)	SK5	Y1-90	BW1A

Standards

Standard	Description
Standard	Description
GOST 1435-99

Description of chemical elements

Element	Units of measurement	Description
Element	Units of measurement	Description
Fe	%	Iron
Si	%	Silicon
Mn	%	Manganese
Cr	%	Chrome
Cu	%	Copper
Ni	%	Nickel
P	%	Phosphorus
C	%	Carbon
S	%	Sulfur

Description of mechanical properties

Parameter	Units of measurement	Description
Parameter	Units of measurement	Description
$\sigma _{U}$	$MPa$	Ultimate tensile strength
$\epsilon_L$	%	Elongation at break (longitudinal)