Cast Iron L4
L1 cast iron
L2 cast iron
Cast iron L3
Cast iron L4
Cast iron L5
Cast iron L6
Cast iron LR1
LR2 cast iron
Cast iron LR3
Cast iron LR4
Cast iron LR5
Cast iron LR6
Cast iron LR7
Designation
| Name | The value |
|---|---|
| Designation GOST Cyrillic | Л4 |
| Designation GOST Latin | L4 |
| Transliteration | L4 |
| The chemical elements | Be4 |
Description
Cast iron L4 apply: for further melting in iron shops in the production of iron castings.
Standards
| Name | Code | Standards |
|---|---|---|
| Cast iron | В11 | GOST 4832-95 |
Chemical composition
| Standard | C | S | P | Mn | Cr | Si | Fe |
|---|---|---|---|---|---|---|---|
| GOST 4832-95 | 3.4-4.5 | 0.01-0.05 | 0.01-1.2 | ≤1.5 | ≤0.1 | 2-2.4 | The rest |
Fe is the basis.
According to GOST 4832-95, cast iron is divided into four groups according to the content of manganese: I group ≤0.30%, II group 0.30-0.90%, III group 0.50-0.90%, IV group 0.90- 1.50%; by the content of phosphorus is divided into 5 classes: class A ≤0,080%, class B ≤0,12%, class B≤0,30%, class G 0,30-0,70%, class D 0,70-1,20 %; for sulfur content is divided into 4 categories: 1 category ≤0,020%, 2 category ≤0,030%, 3 category ≤0,040%, 4 category ≤0,050%. With a mass fraction of chromium of not more than 0.050%, foundry iron is used for the production of castings of cast iron with nodular graphite, with a mass fraction of chromium of not more than 0.040% - for castings of malleable cast iron and with a mass fraction of chromium of not more than 0.10% for castings from gray cast iron. In cast iron smelted from copper-bearing ores, the mass fraction of copper is additionally determined and is indicated in the quality document. Cast iron for the manufacture of piston rings is made with a mass fraction of manganese 0.60-0.80% and phosphorus 0.40-0.60%.
According to GOST 4832-95, cast iron is divided into four groups according to the content of manganese: I group ≤0.30%, II group 0.30-0.90%, III group 0.50-0.90%, IV group 0.90- 1.50%; by the content of phosphorus is divided into 5 classes: class A ≤0,080%, class B ≤0,12%, class B≤0,30%, class G 0,30-0,70%, class D 0,70-1,20 %; for sulfur content is divided into 4 categories: 1 category ≤0,020%, 2 category ≤0,030%, 3 category ≤0,040%, 4 category ≤0,050%. With a mass fraction of chromium of not more than 0.050%, foundry iron is used for the production of castings of cast iron with nodular graphite, with a mass fraction of chromium of not more than 0.040% - for castings of malleable cast iron and with a mass fraction of chromium of not more than 0.10% for castings from gray cast iron. In cast iron smelted from copper-bearing ores, the mass fraction of copper is additionally determined and is indicated in the quality document. Cast iron for the manufacture of piston rings is made with a mass fraction of manganese 0.60-0.80% and phosphorus 0.40-0.60%.
