40H9S2L

for parts operating under load for a long time at temperatures up to 700 degrees C (motor valves, fire bars, fasteners); martensitic steel grade

Classification

Country Section Category
CIS, Russia, Ukraine Steels and alloys for castings Steel for casting with special properties

Chemical composition

Standard Fe, % Si, % Mn, % Cr, % P, % C, % S, %
GOST 977-88 85.735–89.35 2–3 0.3–0.7 8–10 < 0.035 0.35–0.5 < 0.03

Information on suppliers

Technological Properties

Weldability
Boundedly welded

Heat Treatment Modes

Treatment
Without heat treatment

Analogues

Germany USA
G-X45CrSi9-3 S65007

Standards

Standard Description
GOST 977-88

Description of chemical elements

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

Designation of types of weldability

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