Cast iron HSCI45

Designation

Name The value
Designation GOST Cyrillic ВЧ45
Designation GOST Latin BCh45
Transliteration VCh45
By chemical elements -

Description

Cast iron HSCI45 used: for the manufacture of castings parts to replace steel castings with the weight from 500 to 6000 kg with the lowest allowable wall thickness 25 mm, stationary parts of steam turbines, turbine equipment, nuclear power plants, elements of steam boilers and pipelines, hydraulic turbines, hydraulic locks, and other equipment engineering: casting 2 groups, operating at temperatures up to 250 °C, exposed to high static and dynamic loads and friction (pistons, housings, bearing housings, housings worm wheels, bearing cap, tube compressors, RAM Foundation, RAM exhaust parts pipes compressors, gear wheels, gear); castings group 1, operating at temperatures up to 350 °C and castings exposed to high specific pressures, static, dynamic loads and friction (diaphragms, clips, parts, compressors, steam turbines, valves, compressors, nozzles, diffusers, blade, liners, bearings, rings).

Standards

Name Code Standards
Cast iron В11 GOST 7293-85, STP М319-95
Cast iron castings (grey and malleable cast iron) В81 OST 108.962.01-85, OST 24.207.01-90

Chemical composition

Standard C S P Mn Cr Si Fe
GOST 7293-85 3.3-3.8 ≤0.02 ≤0.1 0.3-0.7 ≤0.1 1.9-2.9 Rest
STP М319-95 3.2-3.6 ≤0.02 ≤0.1 ≤0.7 ≤0.1 2.6-3.1 Rest
Fe is the basis.
According to GOST 7293-85 the chemical composition is given for castings with wall thickness up to 50 mm inclusive. For castings with a wall thickness exceeding 50 to 100 mm, the recommended content is C = 3.00-3.50%, Si = 1.30-1.70%. For castings with a wall thickness exceeding 100 mm, the recommended content is C = 2.70-3.20%, Si = 0.50-1.50%.

Mechanical properties

sT|s0,2, MPa σU, MPa d HB, MPa
Castings in cast or heat treated condition for STP М319-95
≥310 ≥450 ≥10 140-225

Description mechanical marks

Name Description
sT|s0,2 Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2%
σU Limit short-term strength
d Elongation after rupture
HB Brinell hardness number

Technological properties

Name The value
Microstructure Ferritic or ferrite-pearlite. Graphite is spherical.