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Cast iron SCH18

Designation

Name The value
Designation GOST Cyrillic СЧ18
Designation GOST Latin CCh18
Transliteration SCh18
The chemical elements -

Description

Cast iron SCH18 used: for the manufacture of castings of cylinder blocks in the automotive industry; machine bases, rails, tables and machine tools; gears, frames, gearboxes, couplings, steam cylinders and other parts sredneshirotnykh in chemical engineering; casting parts of valves and actuators to it; casting parts mining and metallurgical equipment; cast connecting parts for pipelines.

Note

Ferritic-pearlitic cast iron with lamellar graphite.

Standards

Name Code Standards
Castings with special properties (cast iron and steel) В83 KSt 81-033:2009
Cast iron В11 GOST 1412-85
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 24.207.01-90, OST 23.4.258-86, OST 23.4.117-84

Chemical composition

Standard C S P Mn Cr Si Ni Fe
GOST 1412-85 3.1-3.6 ≤0.12 ≤0.45 0.5-1.1 ≤0.35 1.4-2.4 ≤0.35 The rest
KSt 81-033:2009 3.1-3.6 ≤0.12 ≤0.45 0.5-1.1 ≤0.35 1.4-2.4 ≤0.35 The rest
Fe is the basis.
The chemical composition is given on the basis of GOST 1412-54 data and reference literature based on obtaining the required time resistance at break and calculating the carbon equivalent, in GOST 1412-85 the chemical composition is not specified, while it is permissible to make castings from cast iron grade СЧ18 at the request of the consumer. Allowed low alloying of cast iron with various elements (chromium, nickel, copper, phosphorus, etc.).

Mechanical characteristics

σB, MPa Brinell hardness number, MPa
Castings in cast or heat treated condition for STP М319-95
≥180 -
Part of the connecting piping (sand casting) according to GOST 5525-88 (NV - in the center of a wall)
≥150 ≤250

Description mechanical marks

Name Description
σB Limit short-term strength

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