Project Description
1.7362, designated as X12CrMo5 under EN and also known as 12CrMo19-5, is a 5Cr-0.5Mo ferritic alloy heat-resistant steel bar engineered for prolonged elevated-temperature service up to 600°C in oil refinery hydrocrackers, petrochemical pressure vessels, and power generation equipment. Equivalent to ASTM A387 Grade 5 / A182 F5 / A335 P5, this grade delivers exceptional hydrogen attack resistance, high-temperature oxidation resistance, and reliable creep rupture strength. SHUNFU METAL supplies 1.7362 bars in normalized and tempered condition with full EN 10204 3.1/3.2 mill certification.
Introduction to 1.7362 / X12CrMo5
This Cr-Mo alloy steel, standardized under EN 10028-2, EN 10273, and EN 10216-2, is the benchmark 5% chromium grade for sustained elevated-temperature pressure boundary service. With approximately 5% Cr and 0.5% Mo, 1.7362 provides superior resistance to high-temperature hydrogen attack (HTHA), excellent oxidation resistance, and good creep strength — substantially outperforming the lower-chromium 2.25Cr-1Mo grade in hot hydrogen and sulfur-bearing environments up to 600°C. Globally specified as ASTM A387 Gr.5 (plate), A335 P5 (seamless tube), A182 F5 (forgings), and JIS STBA25 / SCMV5, 1.7362 is the preferred material for hydrocracker reactor components, hot hydrogen piping, and high-temperature heat exchanger shells in the world’s most critical refinery units. SHUNFU METAL supplies this grade with controlled hardness and full NDE documentation.
At SHUNFU METAL, 1.7362 bars are manufactured via electric arc furnace melting with ladle furnace refining and vacuum degassing, ensuring ultra-low sulfur and phosphorus levels (S ≤ 0.005%, P ≤ 0.020%). For critical applications, electro-slag remelting (ESR) is available to further refine microstructure and cleanliness. Bars are hot-rolled on a GFM radial forging machine or open-die forged on a 6,000-ton hydraulic press, then normalize at 920–960°C and tempered at 680–740°C to achieve the specified mechanical properties and hardness. Every bar undergoes 100% ultrasonic testing per EN 10228-3 Class 3, with complete chemical, tensile, impact, and hardness results documented in an EN 10204 Type 3.1 or 3.2 certificate. Third-party inspection by SGS, TÜV, DNV, or Bureau Veritas is supported.
Equivalent Grades of 1.7362
1.7362 / X12CrMo5 has recognized equivalents under all major international standards for elevated-temperature pressure equipment. ASTM A387 Gr.5 (plate), A182 F5 (forgings), and A335 P5 (seamless pipe) are the closest cross-references in the API and ASME pressure vessel codes.
| Standard | Designation | Remarks |
|---|---|---|
| DIN W-Nr. | 1.7362 | German Werkstoff number |
| EN | X12CrMo5 / 12CrMo19-5 | Pressure vessel & boiler steel |
| ASTM | A387 Gr.5 / A182 F5 / A335 P5 | Plate, forging & tube grades |
| JIS | STBA25 / SCMV5 | Alloy steel tube & plate |
| GOST | 15Х5М / 15KH5M | Russian Cr-Mo heat-resistant grade |
| GB | 1Cr5Mo | Chinese Cr-Mo alloy steel |
| UNS | S50200 | Unified Numbering System |
Oil & Gas & Petrochemical Applications
1.7362 / F5 steel bars are the industry-standard material for high-temperature, high-pressure, and hydrogen-rich service components in refinery hydrocrackers, petrochemical reactors, oil processing units, and fossil-fuel power plants. With 5% chromium, this grade offers superior resistance to high-temperature hydrogen attack (HTHA) and oxidation, making it safe for hot hydrogen and sulfur-bearing process streams up to 600°C.
Hot hydrogen service vessels
High-pressure H₂ transfer lines
Fixed & floating head exchanger bodies
Gate, globe & check valve bodies
Hot high-pressure separators
HP & IP cylinder casings
FCC & hydroprocessing units
Weld neck, blind & spectacle flanges
High-temperature steam generators
Crude & vacuum heater internals
Hot oil & charge pump components
Stud bolts & nuts for flange joints
Supply Range — 1.7362 Steel Bar
SHUNFU METAL maintains comprehensive inventory of 1.7362 / X12CrMo5 bars in normalized and tempered condition under ISO 9001 & PED 2014/68/EU-certified quality management. Production on a 6,000-ton hydraulic press and GFM radial forging machine ensures exceptional internal soundness and uniform grain structure. All products ship with full EN 10204 3.1 or 3.2 mill certificates, including chemical analysis by OES, tensile and impact test results, hardness values, and ultrasonic test reports.
| Form | Process | Diameter / Thickness | Width | Length |
|---|---|---|---|---|
| Round Bar | Hot-Rolled | ⌀10–500 mm | — | 3000–12000 mm |
| Round Bar | Forged | ⌀100–1200 mm | — | 2000–8000 mm |
| Flat Bar | Hot-Rolled | 3–150 mm | 20–610 mm | 3000–12000 mm |
| Flat Bar / Block | Forged | 50–800 mm | 100–1500 mm | 2000–6000 mm |
Non-standard dimensions, stepped shafts, forged rings (OD 200–2000 mm), discs, tube sheets, custom closed-die forgings, and blocks available upon inquiry. SHUNFU METAL also offers rough machining, saw cutting to length, peeled/ground surface finishes (Ra 0.8–6.3 µm), and full heat treatment services to customer specification.
Chemical Composition of 1.7362
The chemical composition conforms to EN 10028-2 X12CrMo5, with tighter residual element controls applied for critical hydrogen service. The 5% Cr – 0.5% Mo alloy design provides outstanding resistance to high-temperature hydrogen attack (HTHA), excellent oxidation resistance, and reliable creep rupture strength at sustained temperatures up to 600°C, making 1.7362 the superior choice over lower-chromium grades for the most demanding refinery hydroprocessing and hot hydrogen environments.
| C | Si | Mn | P | S | Cr | Mo |
|---|---|---|---|---|---|---|
| 0.10–0.15 | ≤0.50 | 0.30–0.60 | ≤0.020 | ≤0.005 | 4.00–6.00 | 0.45–0.65 |
Values in weight percent (wt%). Iron (Fe) balance. Nitrogen ≤ 0.012%; Copper ≤ 0.30%; Nickel ≤ 0.30%. For critical hydrogen service, SHUNFU METAL restricts sulfur to ≤0.005% and phosphorus to ≤0.015%. ASTM A182 F5 specification allows slightly broader Mn (0.30–0.60%) and Mo (0.45–0.65%) ranges. All heats are verified by optical emission spectrometry (OES) with full traceability to the originating heat number.
Mechanical Properties of 1.7362 / X12CrMo5
In the normalized and tempered (+NT) condition per EN 10028-2, 1.7362 delivers a balanced combination of strength, ductility, and impact toughness across all section thicknesses. SHUNFU METAL applies controlled normalizing at 920–960°C with air cooling, followed by tempering at 680–740°C to achieve the specified mechanical properties. For quenched and tempered (+QT) condition, oil quenching from 900–950°C with tempering at 600–700°C is available for thicker sections.
| Property | ≤60 mm | 60–150 mm | 150–250 mm |
|---|---|---|---|
| Tensile Strength (MPa) | 510–690 | 480–660 | 450–630 |
| Yield Strength (min, MPa) | 320 | 300 | 300 |
| Elongation (min, %) | 20 | 20 | 20 |
| Impact KV (min, J @ +20°C) | 40 | 40 | 40 |
| Impact KV (min, J @ 0°C) | 34 | 34 | 34 |
| Impact KV (min, J @ −20°C) | 27 | 27 | 27 |
| Hardness (HBW, typical) | 170–230 | 170–230 | 170–230 |
| Heat Treatment | Normalized 920–960°C + Tempered 680–740°C | ||
For quenched and tempered (+QT) condition (typically for sections >150 mm): tensile 410–560 MPa, yield ≥275 MPa, elongation ≥22%, hardness ≤179 HB. SHUNFU METAL performs room-temperature tensile testing per EN ISO 6892-1, Charpy V-notch impact testing per EN ISO 148-1, and Brinell hardness testing per EN ISO 6506-1 on every heat treatment lot. Elevated-temperature tensile, creep rupture (ISO 204), and step-cooling embrittlement (J-factor/X-bar) test data available upon request for fitness-for-service assessments.
