GX5CrNiMoNb19-11-2 (EN 1.4581) Austenitic Stainless Steel Casting Material
Austenitic Stainless Steel
Introduction
GX5CrNiMoNb19-11-2 is an austenitic stainless steel casting grade covered by EN 10213, EN 10283, ISO 11972. Typical applications include valves, pumps, agitators and tanks in chemical-processing equipment.
| Field | Value |
|---|---|
| Designation | GX5CrNiMoNb19-11-2 (EN 1.4581) |
| Material Type | Stainless Steel |
| Sub Type | Austenitic Stainless Steel |
| Product Form | casting |
Manufacturing Process
Investment Casting
Shell Molding Casting
Sand Casting
Equivalent Materials
| Standard | Material Grade |
|---|---|
| UNS / ACI | CF8MCb |
Similar Materials
N/A
Reference Standards
| Standard | Standard Title | Edition | Specification | Identifier |
|---|---|---|---|---|
| EN 10213 | Steel castings for pressure purposes | 2007+A1:2016 | GX5CrNiMoNb19-11-2 | EN 1.4581 |
| EN 10283 | Corrosion resistant steel castings | 2019 | GX5CrNiMoNb19-11-2 | EN 1.4581 |
| ISO 11972 | Corrosion-resistant cast steels for general applications | 2023 | GX5CrNiMoNb19-11-2 | EN 1.4581 |
Related Casting Products
Physical Properties
| Property | Value / Unit | Note | Source |
|---|---|---|---|
| Density | 7.9 kg/dm³ | Test at 20 °C | EN 10213; EN 10283 |
| Thermal Expansion | 15.8 ×10⁻⁶/K | Temperature range: 20–100 °C | EN 10213 |
| Thermal Expansion | 17 ×10⁻⁶/K | Temperature range: 20–300 °C | EN 10213 |
| Thermal Expansion | 17.7 ×10⁻⁶/K | Temperature range: 20–500 °C | EN 10213 |
| Thermal Conductivity | 14.5 W/(m·K) | Test at 50 °C | EN 10213 |
| Thermal Conductivity | 15.8 W/(m·K) | Test at 100 °C | EN 10213 |
| Specific Heat | 530 J/(kg·K) | Test at 20 °C | EN 10213 |
| Magnetic Property | Not or slightly magnetic | EN 10213 | |
| Specific Heat | 530 J/(kg·K) | Test at 20 °C | EN 10283 |
| Thermal Conductivity | 14.5 W/(m·K) | Test at 50 °C | EN 10283 |
| Thermal Conductivity | 15.8 W/(m·K) | Test at 100 °C | EN 10283 |
| Thermal Expansion | 15.8 ×10⁻⁶/K | Temperature range: 20–100 °C | EN 10283 |
| Thermal Expansion | 17 ×10⁻⁶/K | Temperature range: 20–300 °C | EN 10283 |
| Thermal Expansion | 17.7 ×10⁻⁶/K | Temperature range: 20–500 °C | EN 10283 |
Chemical Composition
| Element | EN 10213Edition 2007+A1:2016 · wt.%Cast analysis | EN 10283Edition 2019Cast analysis | ISO 11972Edition 2023 |
|---|---|---|---|
| C | ≤ 0.07 | ≤ 0.07 wt.% | ≤ 0.07 wt.% |
| Si | ≤ 1.50 | ≤ 1.50 wt.% | ≤ 1.5 wt.% |
| Mn | ≤ 1.50 | ≤ 1.50 wt.% | ≤ 1.5 wt.% |
| P | ≤ 0.040 | ≤ 0.040 wt.% | ≤ 0.040 wt.% |
| S | ≤ 0.030 | ≤ 0.030 wt.% | ≤ 0.030 wt.% |
| Cr | 18.00–20.00 | 18.00–20.00 wt.% | 18.0–20.0 wt.% |
| Ni | 9.00–12.00 | 9.00–12.00 wt.% | 9.0–12.0 wt.% |
| Mo | 2.00–2.50 | 2.00–2.50 wt.% | 2.00–2.50 wt.% |
| Cu | ≤ 0.50 | ≤ 0.50 wt.%[1] | — / Not specified |
| Nb | 8 × C ≤ Nb ≤ 1.00[2] | 8 × C ≤ Nb + Ta ≤ 1.00[3] | 8 × C ≤ Nb ≤ 1.00[4] |
Notes
EN 10283 · Edition 2019
[1] Cu: Applies unless otherwise agreed; unspecified elements shall not be intentionally added without purchaser agreement except for finishing the heat.
[3] Nb: The niobium content applies to the sum of niobium and tantalum.
EN 10213 · Edition 2007+A1:2016
[2] Nb: Niobium content shall be at least eight times the carbon content and not exceed 1.00 wt.%.
ISO 11972 · Edition 2023
[4] Nb: Niobium shall be at least eight times carbon and shall not exceed 1.00 wt.%.
Heat Treatment
EN 10213–2007+A1:2016 · +AT
| Step | Operation | Temperature | Cooling |
|---|---|---|---|
| 1 | Informative: solution annealing | 1080–1150 °C[1] | water quench |
EN 10283–2019 · +AT
| Step | Operation | Temperature | Cooling |
|---|---|---|---|
| 1 | solution annealing | 1080–1150 °C | water |
ISO 11972–2023 · Solution treated
| Step | Operation | Temperature | Cooling |
|---|---|---|---|
| 1 | solution treatment | 1080–1150 °C[2] | quench |
Notes
EN 10213 · Edition 2007+A1:2016
[1] +AT: Treatment temperatures are given for information; required delivery condition is specified separately.
ISO 11972 · Edition 2023
[2] Solution treated: Depending on thickness, accelerated air cooling.
Mechanical Properties
Core Mechanical Properties
EN 10213 — 2007+A1:2016 · Table 3 — Normative
EN 10283 — 2019 · Table 2 — Normative
| Property | +AT |
|---|---|
| Yield Strength (Rp0.2) | ≥ 185 MPa |
| Yield Strength (Rp1.0) | ≥ 210 MPa |
| Tensile Strength | ≥ 440 MPa |
| Elongation | ≥ 25 % |
| Impact Energy | ≥ 40 J[2] |
- wall thickness ≤ 150 mm; Test block; maximum thickness 150 mm; Room temperature; Yield and tensile strength also apply to the casting up to the maximum specified wall thickness.
ISO 11972 — 2023 · Table 2 — Normative
| Property | Solution treated |
|---|---|
| Yield Strength (Rp0.2) | ≥ 185 MPa |
| Tensile Strength | ≥ 440 MPa |
| Elongation | ≥ 25 % |
| Impact Energy | ≥ 40 J[3] |
| Yield Strength (Rp1.0) | ≥ 210 MPa |
- wall thickness ≤ 150 mm; Room temperature; Test blocks used to verify mechanical properties shall not exceed 150 mm thickness. Properties for samples removed from castings shall be agreed between manufacturer and purchaser.
Additional Mechanical Properties
Notes
EN 10213 · Edition 2007+A1:2016
[1] Yield Strength (Rp1.0)/Tensile Strength/Elongation/Impact Energy: wall thickness ≤ 150 mm; Properties verified on test blocks of thickness up to 150 mm; applicability to casting wall thickness as stated. Larger governing thickness requires agreement.; Room temperature
[4] Yield Strength (Rp1.0): Test at 100 °C; Verification of elevated-temperature yield values is subject to agreement at enquiry and order.
[5] Yield Strength (Rp1.0): Test at 200 °C; Verification of elevated-temperature yield values is subject to agreement at enquiry and order.
[6] Yield Strength (Rp1.0): Test at 300 °C; Verification of elevated-temperature yield values is subject to agreement at enquiry and order.
[7] Yield Strength (Rp1.0): Test at 400 °C; Verification of elevated-temperature yield values is subject to agreement at enquiry and order.
[8] Yield Strength (Rp1.0): Test at 500 °C; Verification of elevated-temperature yield values is subject to agreement at enquiry and order.
[9] Yield Strength (Rp1.0): Test at 550 °C; Verification of elevated-temperature yield values is subject to agreement at enquiry and order.
EN 10283 · Edition 2019
[2] Impact Energy: KV2 as specified in
ISO 11972 · Edition 2023
[3] Impact Energy: Verification of impact tests is required only when indicated by the customer.
Welding Conditions
EN 10213–2007+A1:2016
EN 10283–2019
Notes
EN 10213 · Edition 2007+A1:2016
[1] Preheat: Production welding by the foundry; requirements for austenitic/austenitic-ferritic grades are normative.; Preheat temperature depends on casting geometry, thickness and climatic conditions.
[2] Interpass Temperature: Production welding by the foundry; requirements for austenitic/austenitic-ferritic grades are normative.
[3] Post-weld Heat Treatment: Production welding by the foundry; requirements for austenitic/austenitic-ferritic grades are normative.; In general, production welds are major when prepared cavity depth exceeds 40% of the wall thickness; minor weld corrosion conditions may require special agreement.
EN 10283 · Edition 2019
[4] Preheat: Preheat depends on casting geometry, thickness and climatic conditions.
[5] Post-weld Heat Treatment: minor welds; Special arrangements may be agreed according to corrosion conditions. With low preheat and interpass temperatures (≤150 °C), post-weld heat treatment may be suppressed by agreement.
[6] Post-weld Heat Treatment: major welds; Special arrangements may be agreed according to corrosion conditions. With low preheat and interpass temperatures (≤150 °C), post-weld heat treatment may be suppressed by agreement.
Applications
GX5CrNiMoNb19-11-2 is used for valves, pumps, agitators and tanks in chemical-processing equipment. Other cast components used in this material family include pump casings, impellers, valve bodies, covers and pipe fittings. Typical settings include chemical and pharmaceutical plants, food and beverage machinery, and filling, mixing and liquid-handling systems.
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Email Us for a QuoteLast Updated: November 6, 2026