1.1181 (C35E)

Classification

Country	Section	Category
Country	Section	Category
Germany	Non-alloy Special Steels	Structural Pressure Vessel and Engineering Steels with C < 0,5%

Chemical composition

Standard	Fe, %	Si, %	Mn, %	Cr, %	Ni, %	P, %	C, %	S, %	Mo, %
Standard	Fe, %	Si, %	Mn, %	Cr, %	Ni, %	P, %	C, %	S, %	Mo, %
EN 10083-1	97.445–99.18	< 0.4	0.5–0.8	< 0.4	< 0.4	< 0.03	0.32–0.39	< 0.035	< 0.1

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Mechanical properties at 20 °C

Rolling	Standard	Size, mm	Tension	Classifiers	$\sigma _{U}$ , $MPa$	$\sigma_{Y}$ , $MPa$	$\sigma_{0.2}$ , $MPa$	$\epsilon_L$ , %	$\epsilon_{L (L_0 = 5.65\sqrt{S_o})}$ , %	$\epsilon_T$ , %	$R_{eH}$ , $MPa$	$KV_{L}$ , $J$	$KV_{T}$ , $J$	Treatment
Rolling	Standard	Size, mm	Tension	Classifiers	$\sigma _{U}$ , $MPa$	$\sigma_{Y}$ , $MPa$	$\sigma_{0.2}$ , $MPa$	$\epsilon_L$ , %	$\epsilon_{L (L_0 = 5.65\sqrt{S_o})}$ , %	$\epsilon_T$ , %	$R_{eH}$ , $MPa$	$KV_{L}$ , $J$	$KV_{T}$ , $J$	Treatment
		< 16		normalization	550			21	18	15	300	27
		16–100		normalization	520				19		270
		100–250		normalization	500				19		245
		250–500		normalization	480						220
		500–1000		normalization	470						210
		0.3–3		annealing, soft	540		430	22
		0.3–3		cold rolling	930
		5–10		solid, cold drawn	650–1000		510	6
		10–16		solid, cold drawn	600–950		420	7
		16–40		solid, cold drawn	580–880		320	8
		40–63		solid, cold drawn	550–840		300	9
		63–100		solid, cold drawn	520–800		270	9
		< 8		moderate hardening	630	430		17				35	22
		8–20		moderate hardening	600	380		19
		20–50		moderate hardening	550	320		20
		50–80		moderate hardening	500	290		20
		< 100		normalization							270

Brinell hardness number

Rolling	Standard	Classifiers	Value, HBW
Rolling	Standard	Classifiers	Value, HBW
		rolling, turning	154–207
		annealing, soft	183

Твёрдость по Викерсу

Rolling	Standard	Classifiers	Value, HV
Rolling	Standard	Classifiers	Value, HV
		cold rolling	275
		annealing, soft	170

Technological Properties

Weldability
Weldability
no limits

Standards

Standard	Description
Standard	Description
EN 10083-1

Description of chemical elements

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

Description of mechanical properties

Parameter	Units of measurement	Description
Parameter	Units of measurement	Description
$\sigma_{Y}$	$MPa$	Yield strength
$\sigma_{0.2}$	$MPa$	Tensile stress required to produce a total elongation of 0.2%
$\sigma _{U}$	$MPa$	Ultimate tensile strength
$\epsilon_L$	%	Elongation at break (longitudinal)
$\epsilon_{L (L_0 = 5.65\sqrt{S_o})}$	%	Elongation at break (longitudinal) (for L₀ = 5.65√So)
$\epsilon_T$	%	Elongation at break (transverse)
$R_{eH}$	$MPa$	Upper yield point
$KV_{L}$	$J$	Impact energy (longitudinal)
$KV_{T}$	$J$	Impact energy (transverse)

Designation of types of weldability

Parameter	Units of measurement	Description
Parameter	Units of measurement	Description
no limits		Welding is performed without heating and without subsequent heat treatment
Boundedly welded		Welding is possible with heating up to 100–120 °C and subsequent heat treatment
Difficult to weld		For obtaining quality welded joints, additional operations are required: heating up to 200–300 °C for welding, heat treatment after welding — annealing
Not applicable for welded structures