Steel P355ML2-TM
Print state · default condition
EN 1.8833, 10028-6
TM = m (TMCP as-delivered), t ≤ 16 mm
Standard stocked condition: thermomechanically rolled plate in the as-delivered state, thin gauges with full 355 MPa yield.
Values for the TM condition
Other P355ML2 tempers and conditions
P355ML2 is listed in 5 conditions; see the grade overview at P355ML2.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
M (TMCP as-delivered), t > 63–100 mm | Maximum thickness range of EN 10028-5; reduced strength band, confirm −50 °C impacts at 1/4 t. | 345 | 500 | 25 | 148 HB | 9 % IACS |
M (TMCP as-delivered), t > 40–63 mm | Heavy plate for thick-wall vessels; slightly lower guaranteed yield and toughness scatter. | 370 | 510 | 25 | 150 HB | 9 % IACS |
M + SR | Choose when the fabricated vessel requires PWHT; keep temperature/time low, strength loss must be verified by simulated-PWHT coupons. | 370 | 505 | 27 | 148 HB | 9 % IACS |
M (TMCP as-delivered), t > 16–40 mm | Medium plate gauges; minimum yield drops one step per EN 10028-5 thickness grading. | 380 | 515 | 26 | 152 HB | 9 % IACS |
TMDefaultThis page M (TMCP as-delivered), t ≤ 16 mm | Standard stocked condition: thermomechanically rolled plate in the as-delivered state, thin gauges with full 355 MPa yield. | 390 | 520 | 26 | 155 HB | 9 % IACS |
What is P355ML2-TM?
P355ML2-TM is P355ML2 in the TM condition — standard stocked condition: thermomechanically rolled plate in the as-delivered state, thin gauges with full 355 MPa yield. P355ML2-TM has a yield strength of 390 MPa (56.6 ksi) and a tensile strength of 520 MPa (75.4 ksi) — weaker than 64% of steel grades. Elongation at break is 26% and the elastic modulus is 210 GPa (30.5 Msi). P355ML2-TM has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,500°C (2,732 °F).
Advantages
- Readily welded — 92/100, better than 93% of steel grades
- Forms and bends easily — 75/100, better than 90% of steel grades
- Ductile — tolerates forming and impact — 26%, better than 82% of steel grades
Limitations
- Hard to polish — 45/100, worse than 84% of steel grades
P355ML2-TM properties
Typical room-temperature values for P355ML2-TM; 23 are specific to this condition. Other listed values are P355ML2 reference data and may not represent this condition. Bars are the position among steel grades.
Physical3
P355ML2-TM has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,500°C (2,732 °F).
Mechanical16
P355ML2-TM has a yield strength of 390 MPa (56.6 ksi) and a tensile strength of 520 MPa (75.4 ksi) — weaker than 64% of steel grades. Elongation at break is 26% and the elastic modulus is 210 GPa (30.5 Msi).
Thermal6
P355ML2-TM 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 µm/m·K (6.67 µin/in·°F).
Electrical3
P355ML2-TM conducts electricity at 9 % IACS, better than 71% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (12/100), worse than 53% of steel grades.
Sustainability4
Producing a kilogram of P355ML2-TM 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
P355ML2-TM's machinability is good (60/100, better than 83% of steel grades); weldability excellent (92/100); formability very good (75/100).
Common Calculations5
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with P355ML2-TM
Is P355ML2 easy to machine?
Machines like low-carbon HSLA plate (~55 % of AISI 1212): use positive-rake coated carbide, high feed and coolant to avoid gummy built-up edge.
Can P355ML2 be welded?
Excellent weldability thanks to low CEV; SAW/GMAW/SMAW with low-hydrogen, matching or slightly overmatching Ni-bearing consumables, control heat input and interpass ≤250 °C to preserve −50 °C toughness.
Can P355ML2 be formed, bent or molded?
Cold form/roll freely (A≥22 %); avoid hot forming or normalizing above ~580 °C — it destroys the TMCP structure and the guaranteed properties must then be re-established by heat treatment.
What surface finishes work on P355ML2?
No inherent corrosion resistance: shot-blast to Sa 2½ then epoxy/zinc-rich paint, metallize or galvanize; anodizing is not applicable.
P355ML2 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 |
|---|---|---|
| Cladle analysis, EN 10028-5 | ≤ 0.16 | 0.09 |
| Si | ≤ 0.5 | 0.3 |
| Mn | 0.9 – 1.7 | 1.45 |
| P | ≤ 0.02 | 0.01 |
| SL2 level requires very low S for −50 °C toughness | ≤ 0.01 | 0 |
| Altotal Al, grain refinement | ≥ 0.02 | 0.04 |
| NbNb+V+Ti ≤ 0.22 | ≤ 0.05 | 0.03 |
| V | ≤ 0.1 | 0.04 |
| Ti | ≤ 0.05 | 0.02 |
| Crresidual | ≤ 0.3 | 0.05 |
| Nioften added to aid low-T toughness | ≤ 0.5 | 0.15 |
| Moresidual | ≤ 0.1 | 0.02 |
| Curesidual | ≤ 0.3 | 0.05 |
| N | ≤ 0.02 | 0.01 |
| Fe | balance | — |
P355ML2-TM — frequently asked
What is P355ML2-TM used for?
P355ML2-TM is typically used for cryogenic pressure vessels, arctic gas equipment and chemical tanks. In short: -50 °C toughness class; low CEV, easy welding; stricter ML1 upgrade.
What is the yield strength of P355ML2-TM?
P355ML2-TM has a typical yield strength of 390 MPa (56.6 ksi) and a tensile strength of 520 MPa (75.4 ksi) — weaker than 64% of steel grades. Strength varies by condition: see the 5 listed tempers.
Is P355ML2-TM easy to machine?
Reasonably — machinability is rated good (60/100, better than 83% of steel grades). Machines like low-carbon HSLA plate (~55 % of AISI 1212): use positive-rake coated carbide, high feed and coolant to avoid gummy built-up edge.
Can P355ML2-TM be welded?
Yes — weldability is rated excellent (92/100). Excellent weldability thanks to low CEV; SAW/GMAW/SMAW with low-hydrogen, matching or slightly overmatching Ni-bearing consumables, control heat input and interpass ≤250 °C to preserve −50 °C toughness.
What surface finishes work on P355ML2-TM?
No inherent corrosion resistance: shot-blast to Sa 2½ then epoxy/zinc-rich paint, metallize or galvanize; anodizing is not applicable.
Can P355ML2-TM be formed, bent or molded?
Cold form/roll freely (A≥22 %); avoid hot forming or normalizing above ~580 °C — it destroys the TMCP structure and the guaranteed properties must then be re-established by heat treatment.
What is the maximum service temperature of P355ML2-TM?
P355ML2-TM 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 (Z-quality) — CEN (2018)
- EN 10027-2 — Designation systems for steels: numerical system (1.8833) — CEN (2015)
- EN 1011-2 — Welding recommendations for ferritic steels — CEN (2001)
- ASM Handbook Vol. 1 — Properties and Selection: Irons, Steels, and High-Performance Alloys — ASM International (1990)
- EN 13445-3 — Unfired pressure vessels: design (material physical properties) — CEN (2021)
- worldsteel LCI data for steel plate — World Steel Association (2023)
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.