Cast iron Achs-2
Designation
| Name |
The value |
| Designation GOST Cyrillic |
АЧС-2 |
| Designation GOST Latin |
AChC-2 |
| Transliteration |
AChS-2 |
| The chemical elements |
- |
Description
Cast iron Achs-2 applies: for the production of acceptable castings with wall thickness 15 — 60 mm; parts operating friction (inserts, bushings, guides, etc.); details for work in a pair of shafts increased hardness heat-treated (tempered or normalized) while ensuring: increased clearance for 15−30% more than for the bronze bearing; careful installation and accurate pairing of the friction surfaces; a continuous, thorough lubrication; running at idle.
Note
Grey antifriction cast iron with lamellar graphite.
Standards
| Name |
Code |
Standards |
| Cast iron |
В11 |
GOST 1585-85, STP М319-95 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
Cu |
Ti |
| STP М319-95 |
3-3.8 |
≤0.12 |
0.15-0.4 |
0.3-1 |
0.2-0.5 |
1.4-2.2 |
0.2-0.5 |
The rest |
0.2-0.5 |
0.03-0.1 |
Fe is the basis.
Mechanical characteristics
| σB, MPa |
Brinell hardness number, MPa |
| Castings in cast or heat treated condition for STP М319-95 |
| ≥200 |
180-229 |
Description mechanical marks
| Name |
Description |
| σB |
Limit short-term strength |
Technological properties
| Name |
The value |
| Microstructure |
Perlite or pearlitic-ferritic. Graphite: a form - ПГф1, ПГф2, ПГф4, ВГф5; size - ПГД15 - ПГД180; distribution - ПГр1 - ПГр3. Perlite: footprint - P-П70; dispersion - ПД0,3 - ПД1,6. Fosfina the eutectic (nature of distribution) - ФЭр1, ФЭр2. Cementite is not allowed. |
| terms of Use |
The use of castings made of cast iron notificationname in friction requires careful installation, providing the pair of the friction surfaces and the absence of bias; continuous lubrication, permitting true and significant heating of the friction units; increase of the gap compared to the established bronze 15-30%, in the presence of significant heating osetreni in the work - up to 50%; running at idle and progressively higher loads. At a pressure of P≤10.0 MPa sliding speed V must be ≤0.3 m/s and the product P·V ≤ 2.5 MPa·m/s At a pressure of P≤0.1 MPa sliding speed V must be ≤3.0 m/s and the product P·V ≤ 0.3 MPa·m/s. |
