Steel P460ML1
EN 1.8837, 10028-6
P460ML1 (1.8837) is a thermomechanically rolled fine-grain pressure vessel steel listed with EN 10028-6, offering L1-level low-temperature impact toughness.
Reference datasheet — P460ML1 is not in the instant-quote catalog. Upload your part and an engineer will quote it in this grade or suggest the closest stocked equivalent.
Values for the TM condition
P460ML1 tempers and conditions
P460ML1 is supplied in 5 conditions, soft to hard. TM is the default FabDigit quotes; the values on this page are for it.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
TM | Maximum thickness range normally supplied; use where thick TMCP plate with -40 °C toughness is required. | 425 | 560 | 22 | 170 HB | 8.6 % IACS |
TM | Heavy plate for thick shells and nozzles; lower strength band and slightly lower toughness scatter band. | 450 | 580 | 22 | 175 HB | 8.6 % IACS |
TM + stress relieved / PWHT | Choose when code-required PWHT or heavy welding stress relief is applied; expect a modest strength drop, so verify simulated-PWHT test coupons. | 470 | 590 | 24 | 175 HB | 8.6 % IACS |
TM | Medium-thickness plate for vessel shells; slightly reduced guaranteed yield strength. | 480 | 605 | 23 | 180 HB | 8.6 % IACS |
TMDefault Thermomechanically rolled, t ≤ 16 mm | Standard as-rolled TMCP delivery condition for thin plate; highest guaranteed strength band. | 505 | 615 | 23 | 185 HB | 8.6 % IACS |
Supply forms, finishes and certifications
Ways P460ML1 is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
TM-Z35 | TM + through-thickness quality Z35 | Certification |
What is P460ML1?
P460ML1 (1.8837) is a thermomechanically rolled fine-grain pressure vessel steel listed with EN 10028-6, offering L1-level low-temperature impact toughness. It is chosen for cold-service pressure equipment where the 460 MPa yield class reduces wall thickness while keeping weldability high (CEV ≤ 0.47); plate is supplied in TM, TM+SR and through-thickness tested TM-Z35 conditions across 16–100 mm. Default values are 505 MPa yield, 615 MPa tensile, 23 % elongation and about 185 HB. The TM condition is lost by normalizing or hot forming above about 580 °C, so for thick or hot-formed parts use quenched and tempered P460QL2. P460ML1 has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,490°C (2,714 °F). P460ML1 has a yield strength of 505 MPa (73.2 ksi) and a tensile strength of 615 MPa (89.2 ksi) — stronger than 64% of steel grades. Elongation at break is 23% and the elastic modulus is 210 GPa (30.5 Msi).
What is P460ML1 used for?
- cryogenic tanks
- arctic process vessels
- chemical plant equipment
Advantages
- Tough — resists crack growth — 165 MPa·√m (150.2 ksi·√in), better than 98% of steel grades
- Forms and bends easily — 70/100, better than 86% of steel grades
- Readily welded — 85/100, better than 83% of steel grades
Limitations
- Hard to polish — 45/100, worse than 84% of steel grades
P460ML1 properties
Typical room-temperature values for P460ML1-TM; bars are the position among steel grades.
Physical3
P460ML1 has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,490°C (2,714 °F).
Mechanical16
P460ML1 has a yield strength of 505 MPa (73.2 ksi) and a tensile strength of 615 MPa (89.2 ksi) — stronger than 64% of steel grades. Elongation at break is 23% and the elastic modulus is 210 GPa (30.5 Msi).
Thermal6
P460ML1 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
P460ML1 conducts electricity at 8.6 % IACS, better than 66% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (12/100), worse than 53% of steel grades.
Sustainability4
Producing a kilogram of P460ML1 takes about 25 MJ of energy and emits 2 kg of CO₂ — less than 82% of steel grades. Typical recycled content is 25%.
Manufacturability7
P460ML1's machinability is fair (52/100, better than 52% of steel grades); weldability excellent (85/100); formability very good (70/100).
Common Calculations5
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the steel family
Yield strength against density for every steel grade FabDigit runs. P460ML1 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with P460ML1
Is P460ML1 easy to machine?
Machines like a 600 MPa HSLA plate — use rigid setups, coated carbide at moderate speeds; drilling and edge planing are routine but expect more tool load than S355.
Can P460ML1 be welded?
Excellent weldability at CEV ≤ 0.47; use low-hydrogen consumables matching 460 MPa yield, control heat input (typ. 1.0–2.5 kJ/mm) to protect the TMCP HAZ toughness, and minimise/avoid unnecessary PWHT.
Can P460ML1 be formed, bent or molded?
Cold forming and roll bending are good (min. bend radius ~2t transverse); hot forming above about 580 °C destroys the TMCP condition, so any hot work must be followed by requalification or an agreed heat treatment.
P460ML1 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 max, EN 10028-5 | ≤ 0.16 | 0.1 |
| Si | ≤ 0.6 | 0.35 |
| Mn | 1 – 1.7 | 1.55 |
| PML1 grade tightened vs. M | ≤ 0.02 | 0.01 |
| Slow S for low-temperature toughness / Z-quality | ≤ 0.01 | 0 |
| Altotal Al, grain refinement | ≥ 0.02 | 0.04 |
| NbNb+V+Ti ≤ 0.22 | ≤ 0.05 | 0.04 |
| V | ≤ 0.12 | 0.05 |
| Ti | ≤ 0.05 | 0.02 |
| Cr | ≤ 0.3 | 0.1 |
| Niaids -40 °C toughness | ≤ 0.8 | 0.3 |
| Mo | ≤ 0.2 | 0.08 |
| Cu | ≤ 0.7 | 0.15 |
| N | ≤ 0.03 | 0.01 |
| B | ≤ 0.01 | 5×10⁻⁴ |
| Febalance; CEV typically ≤ 0.45–0.47 | balance |
What surface finishes work on P460ML1?
No anodizing; protect by shot blasting plus epoxy/PU coating, metallizing or hot-dip galvanizing — the bare surface rusts as fast as ordinary carbon steel.
Surface treatments FabDigit runs on steel parts — pick them in the quote configurator or call them out on the drawing. Each links to its datasheet in the surface-finish library (thickness, specs, call-out, material verdicts).
Organic Coating
Black / Phosphate
Thermal Spray
Equivalent designations
Standards and trade names that resolve to Steel P460ML1 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- 1.883710028-6
How much does P460ML1 cost?
P460ML1 is a budget-cost steel ($), cheaper than about 90% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
P460ML1 — frequently asked
What is P460ML1 used for?
P460ML1 is typically used for cryogenic tanks, arctic process vessels and chemical plant equipment. In short: high-toughness TMCP pressure plate; 460 MPa yield, low preheat; L1 cold-service grade.
What is the yield strength of P460ML1?
P460ML1 has a typical yield strength of 505 MPa (73.2 ksi) and a tensile strength of 615 MPa (89.2 ksi) — stronger than 64% of steel grades. Strength varies by condition: see the 5 listed tempers.
Is P460ML1 easy to machine?
Reasonably — machinability is rated fair (52/100, better than 52% of steel grades). Machines like a 600 MPa HSLA plate — use rigid setups, coated carbide at moderate speeds; drilling and edge planing are routine but expect more tool load than S355.
Can P460ML1 be welded?
Yes — weldability is rated excellent (85/100). Excellent weldability at CEV ≤ 0.47; use low-hydrogen consumables matching 460 MPa yield, control heat input (typ. 1.0–2.5 kJ/mm) to protect the TMCP HAZ toughness, and minimise/avoid unnecessary PWHT.
What surface finishes work on P460ML1?
No anodizing; protect by shot blasting plus epoxy/PU coating, metallizing or hot-dip galvanizing — the bare surface rusts as fast as ordinary carbon steel.
Can P460ML1 be formed, bent or molded?
Cold forming and roll bending are good (min. bend radius ~2t transverse); hot forming above about 580 °C destroys the TMCP condition, so any hot work must be followed by requalification or an agreed heat treatment.
What is the maximum service temperature of P460ML1?
P460ML1 is rated for continuous use to about 400°C (752 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
How much does P460ML1 cost?
P460ML1 is a budget-cost steel ($), cheaper than about 90% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
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 10027-2 — Designation systems for steels: numerical system (1.8837) — CEN (2015)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels and High-Performance Alloys — ASM International (1990)
- Thermomechanically rolled pressure vessel plate datasheets (P355M–P460ML2) — European plate mills (2023)
Property data is compiled from published supplier and standards handbooks and normalised for comparison; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.