Stainless Steel 1.4913 +U (Hot rolled)
Finish state
EN 1.4913
Semi-finished bar or forging delivered without final heat treatment when the part maker performs its own quench and temper.
Values for the +U condition
Other 1.4913 tempers and conditions
1.4913 is listed in 3 conditions; see the grade overview at 1.4913.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Annealed | Choose for rough machining, deep forming or as an intermediate delivery condition before final quench and temper. | 520 | 800 | 20 | 22 HRC | — |
+UThis page Hot rolled | Semi-finished bar or forging delivered without final heat treatment when the part maker performs its own quench and temper. | 700 | 1,050 | 12 | 35 HRC | 2.9 % IACS |
+QTDefault Quenched and tempered | Standard supply condition for high-temperature turbine bolting, valve stems and blades to ~600 °C. | 760 | 950 | 16 | 31 HRC | — |
What is 1.4913 +U?
1.4913 +U is 1.4913 supplied in the +U condition — semi-finished bar or forging delivered without final heat treatment when the part maker performs its own quench and temper. 1.4913 +U has a yield strength of 700 MPa (102 ksi) and a tensile strength of 1,050 MPa (152 ksi) — stronger than 92% of stainless steel grades. Elongation at break is 12% and the elastic modulus is 216 GPa (31.3 Msi). 1.4913 +U has a density of 7.7 g/cm³ (0.278 lb/in³), lighter than 83% of stainless steel grades. It melts at 1,425°C (2,597 °F). +QT is the default condition FabDigit quotes; +U is available on request or by drawing note.
Advantages
- High strength — 700 MPa (102 ksi), better than 92% of stainless steel grades
- Conducts heat well — 24 W/m·K (13.9 BTU/hr·ft·°F), better than 81% of stainless steel grades
Limitations
- Needs corrosion protection — 30/100, worse than 99% of stainless steel grades
- Difficult to machine — 20/100, worse than 98% of stainless steel grades
- Difficult to weld — 15/100, worse than 98% of stainless steel grades
- Limited formability — 8/100, worse than 97% of stainless steel grades
- Limited ductility — 12%, worse than 95% of stainless steel grades
1.4913 +U properties
Typical room-temperature values for 1.4913 +U; 23 are specific to this condition. Other listed values are 1.4913 reference data and may not represent this condition. Bars are the position among stainless steel grades.
Physical3
1.4913 +U has a density of 7.7 g/cm³ (0.278 lb/in³), lighter than 83% of stainless steel grades. It melts at 1,425°C (2,597 °F).
Mechanical16
1.4913 +U has a yield strength of 700 MPa (102 ksi) and a tensile strength of 1,050 MPa (152 ksi) — stronger than 92% of stainless steel grades. Elongation at break is 12% and the elastic modulus is 216 GPa (31.3 Msi).
Thermal5
1.4913 +U is rated for continuous service to 400°C (752 °F). It conducts heat at 24 W/m·K (13.9 BTU/hr·ft·°F), better than 81% of stainless steel grades. Thermal expansion is 10.5 µm/m·K (5.83 µin/in·°F).
Electrical2
1.4913 +U has an electrical resistivity of 6×10⁻⁷ Ω·m.
Chemical & Environmental3
Corrosion resistance is poor (30/100), worse than 99% of stainless steel grades.
Sustainability4
Producing a kilogram of 1.4913 +U takes about 48 MJ of energy and emits 4.2 kg of CO₂ — less than 85% of stainless steel grades. Typical recycled content is 40%.
Manufacturability6
1.4913 +U's machinability is poor (20/100, worse than 98% of stainless steel grades); weldability poor (15/100); formability not recommended (8/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 1.4913 +U
Is 1.4913 easy to machine?
Machine in the annealed condition where possible; in +QT use rigid setups, sharp carbide inserts, low speed and generous coolant — work-hardening and poor chip breaking are typical.
Can 1.4913 be welded?
Weldable only with matching 12Cr filler, preheat 250–350 °C, controlled interpass and a mandatory post-weld temper below the tempering temperature; avoid welding on finished bolts.
Can 1.4913 be formed, bent or molded?
Hot forge/upset at 1100–850 °C with slow cooling and re-annealing; cold forming is very limited due to high yield strength and low ductility.
What surface finishes work on 1.4913?
Cannot be anodized; use fine grinding/polishing, phosphating, black oxide, nitriding or aluminide/thermal-spray coatings for high-temperature scaling protection.
1.4913 chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| C | 0.17 – 0.23 | 0.2 |
| Si | ≤ 0.5 | 0.3 |
| Mn | 0.4 – 0.9 | 0.65 |
| P | ≤ 0.03 | — |
| S | ≤ 0.02 | — |
| Cr | 10 – 11.5 | 10.8 |
| Mo | 0.5 – 0.8 | 0.65 |
| Ni | 0.2 – 0.6 | 0.4 |
| V | 0.1 – 0.3 | 0.2 |
| NbMX carbonitride former for creep strength | 0.25 – 0.55 | 0.4 |
| N | 0.05 – 0.1 | 0.07 |
| Alacid-soluble Al restricted to keep N in solution | ≤ 0.02 | — |
| Fe | balance | — |
1.4913 +U — frequently asked
What is 1.4913 +U used for?
1.4913 +U is typically used for steam turbine disks, turbine blades, high-temperature bolting and power generation shafts. In short: high-strength 11Cr turbine steel; stable to 600 °C; low machinability and formability.
What is the yield strength of 1.4913 +U?
1.4913 +U has a typical yield strength of 700 MPa (102 ksi) and a tensile strength of 1,050 MPa (152 ksi) — stronger than 92% of stainless steel grades. Strength varies by condition: see the 3 listed tempers.
Is 1.4913 +U easy to machine?
Not especially — machinability is rated poor (20/100, worse than 98% of stainless steel grades). Machine in the annealed condition where possible; in +QT use rigid setups, sharp carbide inserts, low speed and generous coolant — work-hardening and poor chip breaking are typical.
Can 1.4913 +U be welded?
Not readily — weldability is rated poor (15/100). Weldable only with matching 12Cr filler, preheat 250–350 °C, controlled interpass and a mandatory post-weld temper below the tempering temperature; avoid welding on finished bolts.
What surface finishes work on 1.4913 +U?
Cannot be anodized; use fine grinding/polishing, phosphating, black oxide, nitriding or aluminide/thermal-spray coatings for high-temperature scaling protection.
Can 1.4913 +U be formed, bent or molded?
Hot forge/upset at 1100–850 °C with slow cooling and re-annealing; cold forming is very limited due to high yield strength and low ductility.
What is the maximum service temperature of 1.4913 +U?
1.4913 +U is rated for continuous use to about 400°C (752 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
Sources
- EN 10269 — Steels and nickel alloys for fasteners with specified elevated and/or low temperature properties — CEN (2013)
- EN 10302 — Creep resisting steels, nickel and cobalt alloys — CEN (2008)
- ASM Handbook Vol. 1: Properties and Selection — Irons, Steels, and High-Performance Alloys — ASM International (1990)
- ASM Handbook Vol. 13B: Corrosion — Materials — ASM International (2005)
- High-temperature bolting steel X19CrMoNbVN11-1 datasheet — voestalpine BÖHLER Edelstahl (2020)
Property data is compiled from published supplier and standards handbooks and normalised for comparison. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.