Steel 15H5M (H5M)
Steel 15Kh5M (X5M)
30Cr3MA steel
30Kh3VA steel
Steel 25X5M
Steel 25Kh3MFA-A
Steel 25Kh3MFA (48TS-4)
Steel 25Kh2MFA (48TS-1)
Steel 25Kh2M1F (EI723)
Steel 25Х1МФ (ЭИ10)
Steel 20Х3МВФ (ЭИ415)
Steel 20Х1М1Ф1ТР (EP182)
Steel 18Kh3MV (EI578)
Steel 18Kh2MFA-A
Steel 18Kh2MFA (48TS-3)
15CrM Steel
Steel 15X5VF (X5VF)
Steel 15X5 (X5)
Steel 15Kh2MFA-A
Steel 15Kh2MFA (48TS-3-40)
Steel 13X9M (X9M)
Steel 13Х3Н3М2ВФБ (VKS-10)
12XM steel
Steel 12Kh8VF (1Kh8VF)
Steel 12X8 (1X8)
Steel 12Kh2MFA-A
Steel 12Х2МФА (48ТС-2)
Steel 12Kh1MF (12KhMF; 12KhMFA)
12MX steel
Steel 08Х16Н9М2
Designation
| Name | The value |
|---|---|
| Designation GOST Cyrillic | 15Х5М |
| Designation GOST Latin | 15X5M |
| Transliteration | 15H5M |
| The chemical elements | 15Cr5Mo |
| Name | The value |
|---|---|
| Designation GOST Cyrillic | Х5М |
| Designation GOST Latin | X5M |
| Transliteration | H5M |
| The chemical elements | Cr5Mo |
Description
15X5M steel is used: for the manufacture of housings and internal components of the apparatus refineries and cracking of pipes, pumps, valves, spetskrepezh, pipes and other parts which require resistance to oxidation at temperatures up to +600 °C; details of pipes and valves (tempering air + vacation at 400 °C, air cooling); furnace and a communication pipe used in power and heat networks; of billets intended for production of tubes of the cracking units of oil refining.
Note
Steel martensitic class.
Temperature intense scaling +650 °C.
Standards
| Name | Code | Standards |
|---|---|---|
| Sheets and stripes | В23 | GOST 103-2006 |
| Sectional and shaped rolling | В22 | GOST 1133-71, GOST 2590-2006, GOST 2591-2006 |
| Sheets and stripes | В33 | GOST 4405-75, GOST 7350-77, TU 14-1-2657-79 |
| Pipes steel and connecting parts to them | В62 | GOST 550-75, TU 14-3-442-76, TU 14-3-457-76, TU 14-3-463-2005, TU 14-3-1080-81, TU 14-3Р-62-2002, TU 14-3Р-115-2010 |
| Sectional and shaped rolling | В32 | GOST 7417-75, GOST 8559-75, GOST 8560-78, GOST 14955-77, GOST 20072-74, TU 14-11-245-88 |
| Metal forming. Forgings | В03 | OST 26-01-135-81, TU 0306.018-80 |
| Thermal and thermochemical treatment of metals | В04 | ST ЦКБА 026-2005 |
| Bulls. Blanks. Slabs | В31 | TU 14-1-1834-76, TU 14-1-583-73, TU НЗЛ 341-93 |
Chemical composition
| Standard | C | S | P | Mn | Cr | Si | Ni | Fe | Cu | V | Ti | Mo | W |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| TU 14-1-583-73 | ≤0.15 | ≤0.025 | ≤0.03 | ≤0.5 | 4.5-6 | ≤0.5 | ≤0.6 | The rest | ≤0.2 | ≤0.05 | ≤0.03 | 0.45-0.6 | ≤0.3 |
| GOST 20072-74 | ≤0.15 | ≤0.025 | ≤0.03 | ≤0.5 | 4.5-6 | ≤0.5 | ≤0.6 | The rest | ≤0.2 | ≤0.05 | ≤0.03 | 0.45-0.6 | ≤0.3 |
Fe is the basis.
According to GOST 20072-74, when steel is scrap-process, the content of Cu ≤ 0.30%. When smelting steel by the method of electroslag remelting, the mass fraction of sulfur should not be more than 0.015%. Tungsten is allowed up to 0.30%, vanadium to 0.050% and titanium to 0.030%.
According to TU 14-1-583-73, the chemical composition is given for steel grade 15X5M. In the finished rolled products, deviations in chemical composition are allowed in accordance with GOST 20072. Modification of the steel with cerium is possible at the rate of 0.050%. The mass fraction of cerium is not determined by chemical analysis.
According to GOST 20072-74, when steel is scrap-process, the content of Cu ≤ 0.30%. When smelting steel by the method of electroslag remelting, the mass fraction of sulfur should not be more than 0.015%. Tungsten is allowed up to 0.30%, vanadium to 0.050% and titanium to 0.030%.
According to TU 14-1-583-73, the chemical composition is given for steel grade 15X5M. In the finished rolled products, deviations in chemical composition are allowed in accordance with GOST 20072. Modification of the steel with cerium is possible at the rate of 0.050%. The mass fraction of cerium is not determined by chemical analysis.
Mechanical characteristics
| Section, mm | t отпуска, °C | sT|s0,2, MPa | σB, MPa | d5, % | y, % | kJ/m2, кДж/м2 | Brinell hardness number, MPa | HRC |
|---|---|---|---|---|---|---|---|---|
| Blank pieces of pipe fittings. Annealing in air from 950-970 °C (exposure for 2.5-4.5 hours depending on the thickness and weight of the workpiece) + Vacation at 750-770 °C, cooling in furnace up to 400 °C and then air | ||||||||
| ≤200 | - | ≥294 | ≥490 | ≥18 | ≥40 | ≥588 | 149-197 | - |
| Long products (sample). Annealing in air from 900 °C + Vacation, air cooling | ||||||||
| - | 200 | ≥990 | ≥1260 | ≥16 | ≥63 | - | - | ≥35 |
| Samples from pipes with a wall thickness of 10-12 mm. Normalization + Vacation | ||||||||
| - | - | ≥485 | ≥640 | ≥18 | ≥78 | - | - | - |
| Long products (sample). Annealing in air from 900 °C + Vacation, air cooling | ||||||||
| - | 400 | ≥1010 | ≥1220 | ≥18 | ≥64 | - | - | ≥35 |
| Hot rolled sheet (4,0-50,0 mm) and cold rolled (4,0-5,0 mm) steel according to GOST 7350-77. Annealing at 840 - 870 °C, air cooling | ||||||||
| - | - | ≥235 | ≥470 | ≥18 | - | - | - | - |
| Samples from pipes with a wall thickness of 10-12 mm. Normalization + Vacation | ||||||||
| - | - | ≥430 | ≥510 | ≥12 | ≥75 | - | - | - |
| Rolled steel. Annealing at 840-860 °C, cooling with the furnace | ||||||||
| ≤90 | - | ≥215 | ≥390 | ≥22 | ≥50 | ≥1176 | - | - |
| Long products (sample). Annealing in air from 900 °C + Vacation, air cooling | ||||||||
| - | 450 | ≥1020 | ≥1230 | ≥20 | ≥65 | - | - | ≥37 |
| Samples from pipes with a wall thickness of 10-12 mm. Normalization + Vacation | ||||||||
| - | - | ≥385 | ≥480 | ≥15 | ≥76 | - | - | - |
| Tubular billet on the other 14-1-583-73 after annealing | ||||||||
| - | ≥215 | ≥390 | ≥22 | ≥50 | ≥1177 | ≤170 | - | |
| Long products (sample). Annealing in air from 900 °C + Vacation, air cooling | ||||||||
| - | 500 | ≥1120 | ≥1250 | ≥16 | ≥64 | - | - | ≥35 |
| Samples from pipes with a wall thickness of 10-12 mm. Normalization + Vacation | ||||||||
| - | - | ≥350 | ≥430 | ≥18 | ≥82 | - | - | - |
| Seamless tubes of heat-treated in the delivery condition according to GOST 550-75 | ||||||||
| - | ≥216 | ≥392 | ≥22 | ≥50 | ≥1180 | ≤170 | - | |
| Long products (sample). Annealing in air from 900 °C + Vacation, air cooling | ||||||||
| - | 550 | ≥760 | ≥850 | ≥19 | ≥73 | - | - | ≥20 |
| Samples from pipes with a wall thickness of 10-12 mm. Normalization + Vacation | ||||||||
| - | - | ≥170 | ≥310 | ≥21 | ≥91 | - | - | - |
| Seamless tubes of heat-treated in the delivery condition according to GOST 550-75 | ||||||||
| - | ≥216 | ≥392 | ≥22 | - | - | ≤170 | - | |
| Forgings with a diameter of 280 mm. Normalization at 1000 °C, air cooling + Vacation at 700 °C, air cooling | ||||||||
| - | - | ≥660 | ≥800 | ≥16 | ≥50 | - | - | - |
| Hot deformed tubes in the delivery condition (in cross-section shows the thickness of the wall) | ||||||||
| 2-25 | - | ≥216 | ≥392 | ≥22 | ≥50 | ≥1158 | ≤170 | - |
| Forgings with a diameter of 280 mm. Normalization at 1000 °C, air cooling + Vacation at 700 °C, air cooling | ||||||||
| - | - | ≥580 | ≥680 | ≥15 | ≥68 | - | - | - |
| Hot-deformed pipes. Normalization + Tempering (in cross-section shows the thickness of the wall) | ||||||||
| 2-25 | - | ≥412 | ≥588 | ≥16 | ≥65 | ≥961 | ≤235 | - |
| Forgings with a diameter of 280 mm. Normalization at 1000 °C, air cooling + Vacation at 700 °C, air cooling | ||||||||
| - | - | ≥550 | ≥670 | ≥15 | ≥65 | - | - | - |
| Pipe kiln and communication in the delivery condition on the other 14-3-457-76 (impact strength is specified for tubes with wall thickness ≥ 12 mm and is determined for longitudinal samples) | ||||||||
| - | ≥412 | ≥588 | ≥16 | ≥65 | ≥980 | 180-240 | - | |
| Forgings with a diameter of 280 mm. Normalization at 1000 °C, air cooling + Vacation at 700 °C, air cooling | ||||||||
| - | - | ≥530 | ≥630 | ≥14 | ≥64 | - | - | - |
| Pipe tsentrobezhnolityh heat-treated in the delivery condition according to TU 14-3P-115-2010. Normalization: the loading in the oven at ≤ 350 °C, the temperature rise to 690-720 °C with a speed ≤ 150 °C/h (exposure 4 h), the rise of the temperature to 950-980 with a speed of ≤ 100 °C/h (exposure 2 min/1 mm of wall thickness), cooling to ≤ 100 °C air cooling fan for extended the bottom of the oven or out of the pod, then air cooling + Release: download of in the oven at ≤ 350 °C, the temperature rise to 705-735 °C at a rate of 100 °C/h (exposure 4 h), air cooling | ||||||||
| - | ≥412 | ≥588 | ≥19 | ≥35 | ≥961 | ≤220 | - | |
| Forgings with a diameter of 280 mm. Normalization at 1000 °C, air cooling + Vacation at 700 °C, air cooling | ||||||||
| - | - | ≥520 | ≥620 | ≥16 | ≥70 | - | - | - |
| - | - | ≥465 | ≥550 | ≥19 | ≥75 | - | - | - |
| - | - | ≥390 | ≥500 | ≥22 | ≥82 | - | - | - |
| - | - | ≥300 | ≥415 | ≥22 | ≥84 | - | - | - |
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 |
| y | The relative narrowing |
| kJ/m2 | Toughness |
| HRC | Rockwell hardness (indenter diamond spheroconical) |
Physical characteristics
| Temperature | Е, ГПа | r, кг/м3 | l, Вт/(м · °С) | R, НОм · м | a, 10-6 1/°С | С, Дж/(кг · °С) |
|---|---|---|---|---|---|---|
| 20 | 211 | 7750 | - | 430 | - | - |
| 400 | 178 | 7640 | 34 | - | 122 | - |
| 500 | 145 | 7610 | 33 | - | 123 | - |
| 600 | 102 | 7580 | - | - | 123 | - |
| 100 | - | 7730 | 37 | - | 113 | 483 |
| 200 | - | 7700 | 36 | - | 116 | - |
| 300 | - | 7670 | 35 | - | 119 | 483 |
| 800 | - | - | - | - | 125 | - |
A description of the physical symbols
| Name | Description |
|---|---|
| Е | The normal elasticity modulus |
| G | Modulus of elasticity shear torsion |
| r | Density |
| l | Coefficient of thermal conductivity |
| R | UD. the resistivity |
Technological properties
| Name | The value |
|---|---|
| Weldability | Difficult weldability. Method of welding: SMAW. Necessary preheating and subsequent heat treatment. |
| Propensity to temper brittleness | Tend not. |
| Forging temperature | Start - 1200 °C, the end - of 800 °C. the cross Sections up to 800 mm is subjected to annealing by recrystallization and single hypothermia. |
| Flock-sensitive sensitivity | Sensitive. |
| Workability by cutting | In hot-rolled condition, when blower SB HB 170=390 MPa Kn TV.SPL.=Of 2.7 Kn b.St.=2,0. |
| Macrostructure and contamination | The macrostructure of billets, check for the etched cross templeto should not have shrinkage looseness, bubbles, delaminations, voids, cracks, inclusions and placenow visible without using the magnifying devices. The defects allowed on a point inhomogeneity, the Central porosity and segregation must not exceed 2 points (for each species), subcortical bubbles at 1 point at a depth of less than 2 mm. Permissible defects of billets of steel, ESR should not exceed 1 point (for each indicator) at the point of heterogeneity, Central porosity and segregation, subcortical bubbles are not allowed. |
| Features of heat treatment | Pipe kiln and communication on the other 14-3-457-76 are delivered in heat treated condition. Temperature high release pipe after normalization should not be below 700 °C. |
