By visiting this site, you accept the use of cookies. More about our cookie policy.

Cast iron SCH20

Designation

Name The value
Designation GOST Cyrillic СЧ20
Designation GOST Latin CCh20
Transliteration SCh20
The chemical elements -

Description

Cast iron SCH20 used: for the manufacture of castings with the lowest allowable wall thickness 10 mm: crankcases, covers, cylinder blocks, brake drums, heads and cylinder liners and other parts to automobile and tractor construction; machine beds, machine tools, surface plates, cylinders, valves, machine bases, rails, tables, in machine tools; exhaust pipes, flywheels, crankcases fundamental frames, covers, working cylinders, blocks, and other critical parts of the diesel engine; covers, gears, gears, gears, pulleys, flywheels (at a rate of not more than 3.5 m/s), frames, gearboxes, couplings, steam cylinders and other parts sredneshirotnykh chemical engineering; parts working in compression (Bashmakov, columns); various pipes and radiators; castings for stationary steam turbines, turbine equipment, nuclear power plants, elements of steam boilers and pipelines, hydraulic turbines, hydraulic locks, and other equipment engineering: casting 3 groups subjected to static loads and castings, working in conditions of water vapor and oil at temperatures up to 70 °C (Cabinet, bearing housings, caps-support volobouev, frames, bearings, frames, foundations, liners, bushings, racks, nozzles, covers); casts of group 2, operating at temperatures up to 250 °C, exposed to high static and dynamic loads and friction (pistons, housings, bearing housings, housings worm wheels, bushings, bearing caps, nozzles, compressors, diaphragms, frames, Foundation, frames, exhaust parts, compressor pipes, gear wheels, gear); casting parts of valves and actuators to it; casting parts mining and metallurgical equipment; cast connecting parts for pipelines.

Standards

Name Code Standards
Castings with special properties (cast iron and steel) В83 KSt 81-033:2009
Cast iron В11 GOST 1412-85, STP М319-95
Pipes from ferrous metals and alloys cast and connecting parts to them В61 GOST 5525-88, GOST 9583-75
Castings of cast iron (gray and malleable cast iron) В81 OST 108.962.01-85, OST 24.207.01-90, OST 23.4.258-86, OST 23.4.117-84, TU 14-3-964-80, TU 1-812-0072-94

Chemical composition

Standard C S P Mn Cr Si Fe
GOST 1412-85 3.3-3.5 ≤0.15 ≤0.2 0.7-1 - 1.4-2.4 The rest
KSt 81-033:2009 3.3-3.5 ≤0.15 ≤0.2 0.7-1 - 1.4-2.4 The rest
STP М319-95 3.2-3.7 ≤0.15 ≤0.2 0.4-0.9 ≤0.15 1.5-2.3 The rest
Fe is the basis.
According to GOST 1412-85, low alloying of cast iron by various elements (chromium, nickel, copper, phosphorus, etc.) is allowed.
According to the STP M319-95 in cast iron, a chromium content of not more than 0.30% is allowed on medium and large non-castable castings with a wall thickness of 20 mm or more. Chill castings should be made of cast iron with an increased content of silicon, which should be 1.70-2.30%.

Mechanical characteristics

Section, mm σB, MPa Brinell hardness number, MPa
Approximate data on the time resistance to tensile and hardness in the walls of castings according to GOST 1412-85, STP М319-95
15 ≥200 ≤230
Castings in cast or heat treated condition for STP М319-95
- ≥200 170-241
Approximate data on the time resistance to tensile and hardness in the walls of castings according to GOST 1412-85, STP М319-95
150 ≥120 ≤143
Part of the connecting piping (sand casting) according to GOST 5525-88 (NV - in the center of a wall)
- ≥150 ≤250
Approximate data on the time resistance to tensile and hardness in the walls of castings according to GOST 1412-85, STP М319-95
30 ≥160 ≤216
4 ≥270 ≤255
50 ≥140 ≤170
8 ≥220 ≤240
80 ≥130 ≤163

Description mechanical marks

Name Description
Section Section
σB Limit short-term strength

Physical characteristics

Temperature Е, ГПа r, кг/м3 l, Вт/(м · °С) С, Дж/(кг · °С)
20 85-110 7100 54 480

A description of the physical symbols

Name Description
Е The normal elasticity modulus
l Coefficient of thermal conductivity

Technological properties

Name The value
Microstructure Pearlitic perlito-ferritic, ferrite-pearlitic. Graphite plate small, medium and large.

Our consultant will save your time

+49 (170) 650 7006
Telegram:
WhatsApp:

Subscription

Special offers and discounts. :)