Steel P460ML2 TM+SR
Heat-treated state
EN 1.8831, 10028-6
TM+SR = tM + stress relieved
Choose when the vessel needs PWHT or forming stress relief; hold below ~580 °C to preserve TM properties.
Values for the TM+SR condition
Other P460ML2 tempers and conditions
P460ML2 is listed in 4 conditions; see the grade overview at P460ML2.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
TM | Heavy plate range; use when wall thickness governs and reduced proof strength is acceptable. | 465 | 570 | 23 | 168 HB | 8.5 % IACS |
TM | Medium plate thickness range; yield drops one step per EN 10028-5 thickness table. | 480 | 580 | 24 | 170 HB | 8.5 % IACS |
TM+SRThis page TM + stress relieved | Choose when the vessel needs PWHT or forming stress relief; hold below ~580 °C to preserve TM properties. | 480 | 585 | 25 | 170 HB | 8.5 % IACS |
TMDefault thermomechanically rolled, t ≤ 16 mm | Standard as-supplied condition for thin plate; highest guaranteed strength level of the grade. | 500 | 600 | 24 | 175 HB | 8.5 % IACS |
What is P460ML2 TM+SR?
P460ML2 TM+SR is P460ML2 heat treated to TM+SR — choose when the vessel needs PWHT or forming stress relief; hold below ~580 °C to preserve TM properties. P460ML2 TM+SR has a yield strength of 480 MPa (69.6 ksi) and a tensile strength of 585 MPa (84.8 ksi) — stronger than 59% of steel grades. Elongation at break is 25% and the elastic modulus is 210 GPa (30.5 Msi). P460ML2 TM+SR has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,430°C (2,606 °F). TM is the default condition FabDigit quotes; TM+SR is available on request or by drawing note.
Advantages
- Tough — resists crack growth — 135 MPa·√m (122.9 ksi·√in), better than 93% of steel grades
- Readily welded — 88/100, better than 87% of steel grades
- Ductile — tolerates forming and impact — 25%, better than 77% of steel grades
Limitations
- Hard to polish — 45/100, worse than 84% of steel grades
P460ML2 TM+SR properties
Typical room-temperature values for P460ML2 TM+SR; 23 are specific to this condition. Other listed values are P460ML2 reference data and may not represent this condition. Bars are the position among steel grades.
Physical3
P460ML2 TM+SR has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,430°C (2,606 °F).
Mechanical16
P460ML2 TM+SR has a yield strength of 480 MPa (69.6 ksi) and a tensile strength of 585 MPa (84.8 ksi) — stronger than 59% of steel grades. Elongation at break is 25% and the elastic modulus is 210 GPa (30.5 Msi).
Thermal6
P460ML2 TM+SR is rated for continuous service to 400°C (752 °F). It conducts heat at 45 W/m·K (26 BTU/hr·ft·°F), better than 66% of steel grades. Thermal expansion is 12.2 µm/m·K (6.78 µin/in·°F).
Electrical3
P460ML2 TM+SR conducts electricity at 8.5 % IACS, better than 63% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (13/100), better than 66% of steel grades.
Sustainability4
Producing a kilogram of P460ML2 TM+SR takes about 25 MJ of energy and emits 2.1 kg of CO₂ — less than 82% of steel grades. Typical recycled content is 25%.
Manufacturability7
P460ML2 TM+SR's machinability is good (57/100, better than 71% of steel grades); weldability excellent (88/100); formability good (58/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with P460ML2 TM+SR
Is P460ML2 easy to machine?
Machines like a 500 MPa-class HSLA plate — rigid setups, coated carbide, moderate speeds; watch for residual-stress distortion when machining flame-cut edges.
Can P460ML2 be welded?
Very good weldability thanks to low carbon equivalent; use low-hydrogen consumables matching 460 MPa class, control heat input and interpass temperature so the fine-grain TM structure and -50 °C toughness are not lost, and keep PWHT below ~580 °C.
Can P460ML2 be formed, bent or molded?
Cold formable for shells and heads with generous bend radii (typically ≥2–3 t, transverse to rolling direction); avoid hot forming above ~580 °C or re-normalizing, which destroys the thermomechanically rolled properties.
What surface finishes work on P460ML2?
No inherent corrosion protection: shot-blast to Sa 2½ and apply epoxy/zinc-rich paint, metallize or clad; not anodizable.
P460ML2 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 |
|---|---|---|
| CEN 10028-5 max for P460M/ML1/ML2 | ≤ 0.16 | 0.1 |
| Si | ≤ 0.6 | 0.35 |
| Mn | 1 – 1.7 | 1.5 |
| Ptightened for L2 quality | ≤ 0.02 | 0.01 |
| Stightened for L2 quality; lower on HIC option | ≤ 0.01 | 0 |
| Altotal Al, grain refinement | ≥ 0.02 | 0.04 |
| NbNb+Ti+V ≤ 0.22 | ≤ 0.05 | 0.04 |
| V | ≤ 0.12 | 0.05 |
| Ti | ≤ 0.05 | 0.02 |
| Niaids low-temperature toughness | ≤ 0.8 | 0.25 |
| Cr | ≤ 0.3 | 0.1 |
| Mo | ≤ 0.2 | 0.08 |
| Cu | ≤ 0.7 | 0.15 |
| N | ≤ 0.03 | 0.01 |
| Fe | balance | — |
P460ML2 TM+SR — frequently asked
What is P460ML2 TM+SR used for?
P460ML2 TM+SR is typically used for cryogenic storage, LNG equipment and arctic pipelines. In short: guaranteed -50 °C toughness; 500 MPa yield, highly weldable; TMCP alternative to Q&T plate.
What is the yield strength of P460ML2 TM+SR?
P460ML2 TM+SR has a typical yield strength of 480 MPa (69.6 ksi) and a tensile strength of 585 MPa (84.8 ksi) — stronger than 59% of steel grades. Strength varies by condition: see the 4 listed tempers.
Is P460ML2 TM+SR easy to machine?
Reasonably — machinability is rated good (57/100, better than 71% of steel grades). Machines like a 500 MPa-class HSLA plate — rigid setups, coated carbide, moderate speeds; watch for residual-stress distortion when machining flame-cut edges.
Can P460ML2 TM+SR be welded?
Yes — weldability is rated excellent (88/100). Very good weldability thanks to low carbon equivalent; use low-hydrogen consumables matching 460 MPa class, control heat input and interpass temperature so the fine-grain TM structure and -50 °C toughness are not lost, and keep PWHT below ~580 °C.
What surface finishes work on P460ML2 TM+SR?
No inherent corrosion protection: shot-blast to Sa 2½ and apply epoxy/zinc-rich paint, metallize or clad; not anodizable.
Can P460ML2 TM+SR be formed, bent or molded?
Cold formable for shells and heads with generous bend radii (typically ≥2–3 t, transverse to rolling direction); avoid hot forming above ~580 °C or re-normalizing, which destroys the thermomechanically rolled properties.
What is the maximum service temperature of P460ML2 TM+SR?
P460ML2 TM+SR 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 10028-5: Flat products made of steels for pressure purposes — Weldable fine grain steels, thermomechanically rolled — CEN (2017)
- EN 10164: Steel products with improved deformation properties perpendicular to the surface — CEN (2018)
- EN 13445-3: Unfired pressure vessels — Design (material design data) — CEN (2021)
- ASM Handbook Vol. 1: Properties and Selection — Irons, Steels and High-Performance Alloys (HSLA plate) — ASM International (1990)
- European heavy-plate mill datasheets for P460M/ML1/ML2 TMCP pressure vessel plate — plate producers (Dillinger / Ilsenburg / voestalpine class) (2022)
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.