Steel 15KHSND
Designation
| Name | The value |
|---|---|
| Designation GOST Cyrillic | 15ХСНД |
| Designation GOST Latin | 15XCHD |
| Transliteration | 15HSND |
| The chemical elements | 15CrСНCu |
Description
15KHSND steel is used: for the production of welded steel elements and various details, which are requirements of high strength and corrosion resistance with the restriction of mass and operating at temperatures from -70 °C to +450 °C; rolled, intended for the manufacture of bridge structures normal Northern execution.
Note
Chronographically low alloy steel with copper. The degree of deoxidation — SP.
15KHSND steel provides strength class long products, strip and shaped rolled CP 325 with a thickness up to 32 mm., KP 345 in thicknesses up to 10 mm.
15KHSND steel provides strength grade sheet, universal broadband rental and roll-formed profiles KP 345 with plate thickness of 32 mm. without the use of additional hardening treatment.
Standards
| Name | Code | Standards |
|---|---|---|
| Sectional and shaped rolling | В22 | GOST 1133-71, GOST 8239-89, GOST 8240-97, GOST 8278-83, GOST 8281-80, GOST 8282-83, GOST 8283-93, GOST 9234-74, GOST 11474-76, GOST 2590-2006, GOST 2591-2006, OST 5.9087-84 |
| Classification, nomenclature and general norms | В20 | GOST 19281-89 |
| Pipes steel and connecting parts to them | В62 | GOST 20295-85, GOST 24950-81 |
| Sheets and stripes | В23 | GOST 82-70, GOST 6713-91, GOST 17066-94, GOST 19903-74, GOST 19904-90, GOST 103-2006, GOST 19282-73, GOST 19903-90, TU 14-1-4632-93, TU 14-1-5120-2008 |
| Welding and cutting of metals. Soldering, riveting | В05 | OST 36-58-81 |
| Sheets and stripes | В33 | TU 14-1-5241-93, TU 302.02.130-91, TU 302.02.151-92, TU 14-1-4431-88 |
| Sectional and shaped rolling | В32 | TU 14-136-367-2008 |
Chemical composition
| Standard | C | S | P | Mn | Cr | Si | Ni | Fe | Cu | N | As | Al | V | Ti | Nb |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| GOST 6713-91 | 0.12-0.18 | ≤0.035 | ≤0.035 | 0.4-0.7 | 0.6-0.9 | 0.4-0.7 | 0.3-0.6 | The rest | 0.2-0.4 | ≤0.008 | ≤0.08 | - | - | - | - |
| GOST 17066-94 | 0.12-0.18 | ≤0.04 | ≤0.035 | 0.4-0.7 | 0.6-0.9 | 0.4-0.7 | 0.3-0.6 | The rest | 0.2-0.4 | ≤0.008 | ≤0.08 | ≤0.03 | ≤0.1 | ≤0.03 | ≤0.02 |
| GOST 19282-73 | 0.12-0.18 | ≤0.04 | ≤0.035 | 0.4-0.7 | 0.6-0.9 | 0.4-0.7 | 0.3-0.6 | The rest | 0.2-0.4 | ≤0.008 | ≤0.08 | ≤0.05 | - | ≤0.03 | - |
| TU 14-1-5120-2008 | 0.1-0.15 | ≤0.01 | ≤0.015 | 0.6-0.9 | 0.3-0.6 | 0.4-0.7 | 0.2-0.5 | The rest | 0.2-0.4 | ≤0.008 | ≤0.08 | - | - | - | 0.03-0.06 |
According to GOST 17066-94, the mass fraction of arsenic is allowed up to 0.015%, with the mass fraction of phosphorus being not more than 0.030%.
According to GOST 19282-73, it is allowed to modify steel with calcium and rare-earth elements from the calculation of the introduction of not more than 0.02% calcium and 0.05% rare-earth elements into the metal. In the steel, cobalt is allowed up to 0.050%.
According to GOST 19281-89 and GOST 19282-73, it is allowed to add aluminum and titanium from the calculation of the mass fraction in the rolled aluminum - no more than 0.050%, titanium - no more than 0.030%.
According to GOST 6713-91, nitrogen content is allowed up to 0.012%. In steel, deoxidized with aluminum, the residual content of acid-soluble aluminum should be not less than 0.020%. The use of other deoxidizers is allowed. In the rental for bridge structures of the northern version, the mass fraction of sulfur should not exceed 0.030%, phosphorus - not more than 0.025%. Manufacture of electroslag remelting steel is permitted. The analysis of rolling on arsenic and nitrogen is made at the request of the consumer. In the finished category 3 rolled product, the mass fraction of carbon should be ≤ 0.18%.
According to TU 14-1-5120-2008 the chemical composition is given for high quality steel grade 15ХСНДА. A mass fraction in the finished sheet steel is allowed up to 0.012%. In agreement with the customer, the replacement of niobium with vanadium in the amount of 0,08-0,12% is allowed. In the finished rolling deviations in the chemical composition in accordance with GOST 6713. The sheets are delivered with a guarantee of weldability. Carbon equivalent of Se ≤ 0.45%.
Mechanical characteristics
| Section, mm | t отпуска, °C | sT|s0,2, MPa | σB, MPa | d5, % | d4 | d10 | y, % | Brinell hardness number, MPa |
|---|---|---|---|---|---|---|---|---|
| Steel hot-rolled sheet in the delivery condition | ||||||||
| 2-3.9 | - | - | ≥490 | - | ≥17 | - | - | - |
| 5-9 | - | ≥350 | ≥500 | ≥21 | - | - | - | - |
| Bars and shapes of high-strength steel in the delivery state according to the GOST 19281-89 (specified strength class) | ||||||||
| ≤32 | - | ≥325 | ≥450 | ≥21 | - | - | - | - |
| ≤10 | - | ≥345 | ≥480 | ≥21 | - | - | - | - |
| Rolled steel. Quenching in water from 900 °C + Vacation | ||||||||
| - | 200 | ≥1220 | ≥1450 | - | - | ≥10 | ≥56 | ≥425 |
| The leaves are normalized | ||||||||
| - | - | ≥370 | ≥620 | - | - | ≥20 | - | - |
| Rolled steel. Quenching in water from 900 °C + Vacation | ||||||||
| - | 300 | ≥1160 | ≥1370 | - | - | ≥10 | ≥57 | ≥410 |
| The leaves are normalized | ||||||||
| - | - | ≥370 | ≥590 | - | - | ≥15 | - | - |
| Sheet metal in delivery condition on the other 14-1-4632-93 (samples transverse) | ||||||||
| 5-25 | - | 345-540 | 490-690 | ≥21 | - | - | - | - |
| Rolled steel. Quenching in water from 900 °C + Vacation | ||||||||
| - | 400 | ≥1080 | ≥1170 | - | - | ≥11 | ≥58 | ≥360 |
| The leaves are normalized | ||||||||
| - | - | ≥360 | ≥610 | - | - | ≥11 | - | - |
| The plates and universal broadband in the state of delivery according to GOST 19282-73, TU 14-1-5241-93. Quenching + Tempering (samples transverse) | ||||||||
| 8-32 | - | ≥345 | ≥490 | ≥21 | - | - | - | - |
| Rolled steel. Quenching in water from 900 °C + Vacation | ||||||||
| - | 500 | ≥840 | ≥930 | - | - | ≥15 | ≥62 | ≥275 |
| The leaves are normalized | ||||||||
| - | - | ≥375 | ≥590 | - | - | ≥14 | - | - |
| Bars and shapes supplied | ||||||||
| ≤10 | - | ≥345 | ≥490 | ≥21 | - | - | - | - |
| Rolled steel. Quenching in water from 900 °C + Vacation | ||||||||
| - | 600 | ≥640 | ≥740 | - | - | ≥20 | ≥68 | ≥220 |
| The leaves are normalized | ||||||||
| - | - | ≥300 | ≥365 | - | - | ≥17 | - | - |
| Bars and shapes supplied | ||||||||
| 10-32 | - | ≥325 | ≥470 | ≥21 | - | - | - | - |
| 32-40 | - | - | ≥500 | ≥21 | - | - | - | - |
| Plate, broadband (universal), shaped, flat and long products according to GOST 6713-91, THE 14-1-5120-2008 (article 15HSNDA) for steel structures (to obtain the required mechsuit allowed normalization or quenching with high vacation rental 1 category, quenching with high vacation - rental 2 categories) | ||||||||
| 33-50 | - | 335-440 | 470-670 | ≥19 | - | - | - | - |
| 8-32 | - | 345-450 | 490-685 | ≥21 | - | - | - | - |
| Pre-painted steel sheet of high-strength steel in the delivery state GOST 17066-94 | ||||||||
| 0.5-3.9 | - | ≥345 | ≥490 | - | ≥19 | - | - | - |
| 0.5-3.9 | - | ≥345 | ≥460 | - | ≥19 | - | - | - |
Description mechanical marks
| Name | Description |
|---|---|
| Section | Section |
| sT|s0,2 | Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2% |
| σB | Limit short-term strength |
| d5 | Elongation after rupture |
| d4 | Elongation after rupture |
| d10 | Elongation after rupture |
| y | The relative narrowing |
Technological properties
| Name | The value |
|---|---|
| Weldability | Welded without any restrictions. Welding methods: SMAW, ADS submerged arc and gas protection electroslag welding. |
| Propensity to temper brittleness | Malosolone. |
| Forging temperature | Start - 1180 °C, the end - 840 °C. |
| Flock-sensitive sensitivity | not sensitive. |
| Corrosion resistance | Steel malosana to brittleness, therefore welds are prone to cracking. |
| Machining by cutting | In the normalized released condition when blower SB=560 MPa Kn TV.SPL.=1,4 Kn b.St.=1,12. |