Project Description
1.4914 / X19CrMoNbVN11-1 is a martensitic creep-resisting stainless steel strengthened with molybdenum, vanadium, niobium, nitrogen, and boron. Engineered for continuous service at temperatures up to 600°C, this grade delivers high tensile strength, exceptional creep rupture resistance, and reliable oxidation resistance under sustained thermal load. Widely specified across the oil and gas sector, it is the material of choice for bolting, valve internals, and turbine components in high-temperature, high-pressure environments. SHUNFU METAL supplies 1.4914 as hot-rolled and forged bars under ISO 9001 and API Q1 certified quality systems, with every heat undergoing full spectrometric verification, ultrasonic testing, and mechanical certification before dispatch.
What Is 1.4914 / X19CrMoNbVN11-1
This grade belongs to the family of 11% Cr martensitic stainless steels designed for creep resistance rather than general corrosion service. Its strengthening mechanism relies on a dense distribution of fine MX-type precipitates formed by V, Nb, and N additions, which pin dislocations and grain boundaries at elevated temperature. Boron is added in controlled trace amounts to improve hardenability and creep ductility. The result is a material that retains yield strength above 500 MPa at 500°C and exhibits a 100,000-hour creep rupture strength of approximately 95 MPa at 600°C. SHUNFU METAL produces this grade through EAF melting followed by ladle refining and, where specified, ESR or VAR remelting to achieve the ultra-low sulfur and inclusion ratings required by oil and gas end-users.
Equivalent Grades of 1.4914
| Standard | Country / Region | Equivalent Designation |
|---|---|---|
| EN 10088-1 | Europe | 1.4913 / 1.4914 — X19CrMoNbVN11-1 |
| EN 10269 / EN 10302 | Europe | 1.4913 — X19CrMoNbVN11-1 (fasteners & creep-resisting) |
| DIN 17240 | Germany | 1.4913 — X19CrMoVNbN 11-1 |
| AFNOR NF | France | Z20CDNbV11 / Z21CDNbV11 |
| GOST | Russia | 18Ch11MNFB (18×11ΜΝΦΒ) |
| GB / GB/T 3098.24 | China | 18Cr11NiMoNbVN / 2Cr11NiMoNbVN — VW |
| JIS | Japan | SUH600 |
SHUNFU METAL cross-references these standards and certifies material to the prevailing specification required by the customer. Where a direct ASTM or AMS equivalent is not formally listed, SHUNFU METAL can supply to the nearest matching grade with dual certification upon request.
Oil & Gas Applications of 1.4914
High-temperature fasteners for steam and gas turbines in refinery CHP plants and compressor drive units.
Gate, globe, and control valve internals operating at up to 600°C in hydrogen, H2S, and sour hydrocarbon service.
Centrifugal and multi-stage pump shafts in hot hydrocarbon and boiler feedwater circuits within refinery process units.
Studs, nuts, and tie rods for centrifugal and reciprocating compressors handling cracked gas and synthesis gas.
High-temperature pressure vessel and heat exchanger flange bolting per ASME B16.5 for hydrocracker and reformer service.
Tube hangers, supports, and anchor castings in ethylene cracking and steam methane reforming furnaces.
Supply Range of 1.4914 Bars
SHUNFU METAL stocks and produces 1.4914 in the following dimensional ranges. All material is manufactured under ISO 9001 and API Q1 quality management systems. Each production lot undergoes full chemical analysis by optical emission spectrometry, ultrasonic testing per EN 10308 / ASTM A388, mechanical testing in the QT condition, and is supplied with an EN 10204 Type 3.1 certification.
| Product Form | Dimension Range | Length | Condition |
|---|---|---|---|
| Hot-Rolled Round Bar | 16 mm – 500 mm dia. | 3,000 – 12,000 mm | Annealed / QT |
| Hot-Rolled Flat Bar | 10×50 mm – 100×800 mm | 3,000 – 8,000 mm | Annealed / QT |
| Forged Round Bar | 200 mm – 1,200 mm dia. | 2,000 – 10,000 mm | QT / Rough Machined |
| Forged Flat / Block | 80×200 mm – 500×1,500 mm | 2,000 – 6,000 mm | QT / Rough Machined |
Forged products are produced with a minimum forging ratio of 5:1. SHUNFU METAL performs 100% ultrasonic inspection on all forged bars above 100 mm section thickness. Custom dimensions, step-down shafts, and pre-machined blanks are available to customer drawings.
Chemical Composition of 1.4914
Heat analysis per EN 10088-1 and EN 10269, verified by SHUNFU METAL using OES on every heat.
| C | Si | Mn | P | S | Cr | Ni | Mo | V | Nb | N | B | Al |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0.17–0.23 | ≤0.50 | 0.40–0.90 | ≤0.025 | ≤0.015 | 10.0–11.5 | 0.20–0.60 | 0.50–0.80 | 0.10–0.30 | 0.25–0.55 | 0.05–0.10 | ≤0.0015 | ≤0.020 |
All values in weight %. SHUNFU METAL applies tighter internal control limits on S (≤0.010%), P (≤0.020%), and trace elements to meet the cleanliness requirements of oil and gas specifications.
Mechanical Properties of 1.4914
Room-temperature properties in the quenched and tempered (+QT) condition per EN 10269, for bar diameters up to 160 mm. SHUNFU METAL verifies every production lot against these requirements.
| Property | Value |
|---|---|
| Tensile Strength, Rm | 900 – 1,050 MPa |
| Yield Strength, Rp0.2 | ≥ 750 MPa |
| Elongation, A | ≥ 12% |
| Reduction of Area, Z | ≥ 40% |
| Impact Energy, KV2 (20°C) | ≥ 20 J |
| Brinell Hardness | ≤ 302 HBW |
Heat treatment: austenitize at 1,100 – 1,150°C, oil or air cool, temper at 670 – 720°C (minimum 2 hours), air cool. SHUNFU METAL documents full heat treatment time-temperature charts and mechanical test results in the EN 10204 Type 3.1 certificate supplied with every shipment. Elevated-temperature yield strength at 500°C remains above 495 MPa, and at 600°C above 305 MPa per EN 10269 validated values.