Steel P500QH
EN P500QH
P500QH (1.8874) is the hollow-section variant of the P500Q quenched-and-tempered nickel-alloy steel, covering tubular product in the 500 MPa minimum yield class.
Reference datasheet — P500QH 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 QT condition
P500QH tempers and conditions
P500QH is supplied in 4 conditions, soft to hard. QT is the default FabDigit quotes; the values on this page are for it.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Q&T | Thickest standard supply range; reduced yield/tensile due to slower quench rate at mid-thickness. | 480 | 600 | 20 | 16 HRC | 7 % IACS |
Q&T | Heavy plate condition; standard-mandated strength step-down for section thickness above 50 mm. | 520 | 630 | 21 | 18 HRC | 7 % IACS |
Q&T + stress relieved / simulated PWHT | Choose when the fabricated vessel will receive PWHT; properties quoted after simulated post-weld heat treatment below the tempering temperature. | 525 | 635 | 22 | 18 HRC | 7 % IACS |
QTDefault Quenched and tempered | Standard as-delivered condition for EN 10028-6 plate up to 50 mm; full 500 MPa minimum yield. | 545 | 660 | 21 | 20 HRC | 7 % IACS |
What is P500QH?
P500QH (1.8874) is the hollow-section variant of the P500Q quenched-and-tempered nickel-alloy steel, covering tubular product in the 500 MPa minimum yield class. Typical values are 545 MPa yield, 660 MPa tensile, 21 % elongation and about 220 HB (20 HRC), so it delivers plate-level strength and toughness in structural tube and welded hollow sections, available in QT, QT-50-100, QT-100-150 and QT+SR conditions. Service is capped near 400 °C, there is no inherent corrosion resistance, and welding and post-weld heat treatment must stay below the tempering temperature. P500Q plate is the flat-product equivalent; P690QH covers the higher-strength tubular class. P500QH has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,420°C (2,588 °F). P500QH has a yield strength of 545 MPa (79 ksi) and a tensile strength of 660 MPa (95.7 ksi) — stronger than 70% of steel grades. Elongation at break is 21% and the elastic modulus is 210 GPa (30.5 Msi).
What is P500QH used for?
- Structural tubing
- Pressure vessel connections
- Crane and lifting equipment
- Heavy fabrications
Advantages
- Tough — resists crack growth — 120 MPa·√m (109.2 ksi·√in), better than 81% of steel grades
P500QH properties
Typical room-temperature values for P500QH-QT; bars are the position among steel grades.
Physical3
P500QH has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,420°C (2,588 °F).
Mechanical17
P500QH has a yield strength of 545 MPa (79 ksi) and a tensile strength of 660 MPa (95.7 ksi) — stronger than 70% of steel grades. Elongation at break is 21% and the elastic modulus is 210 GPa (30.5 Msi).
Thermal6
P500QH is rated for continuous service to 400°C (752 °F). It conducts heat at 38 W/m·K (22 BTU/hr·ft·°F), worse than 69% of steel grades. Thermal expansion is 12 µm/m·K (6.67 µin/in·°F).
Electrical3
P500QH conducts electricity at 7 % IACS, worse than 74% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (12/100), worse than 53% of steel grades.
Sustainability4
Producing a kilogram of P500QH takes about 30 MJ of energy and emits 2.2 kg of CO₂ — more than 56% of steel grades. Typical recycled content is 25%.
Manufacturability7
P500QH's machinability is fair (45/100, worse than 65% of steel grades); weldability good (65/100); formability fair (45/100).
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. P500QH is highlighted; hover a dot for its name, or open the interactive family chart.
Working with P500QH
Is P500QH easy to machine?
Machines like a 220 HB Q&T alloy steel — rigid setups, coated carbide, moderate speeds; avoid heating the surface above the tempering temperature.
Can P500QH be welded?
Weldable with low-hydrogen SAW/FCAW/GMAW consumables; control CEV-based preheat (typically 100–150 °C), limit heat input and hold PWHT below the tempering temperature.
Can P500QH be formed, bent or molded?
Cold bending is possible with generous radii (typically ≥3t transverse); hot forming above the tempering temperature requires re-quench and temper.
P500QH 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 maximum | ≤ 0.2 | 0.16 |
| Si | ≤ 0.8 | 0.35 |
| Mn | 0.8 – 1.7 | 1.3 |
| P | ≤ 0.03 | 0.01 |
| Slow-S for through-thickness quality | ≤ 0.01 | 0 |
| Cr | ≤ 1.5 | 0.5 |
| Nitoughness/hardenability | ≤ 2 | 1 |
| Mo | ≤ 0.7 | 0.45 |
| Cu | ≤ 0.5 | 0.15 |
| V | ≤ 0.12 | 0.04 |
| Nb | ≤ 0.06 | 0.03 |
| Ti | ≤ 0.05 | 0.02 |
| Bhardenability booster | ≤ 0.01 | 0 |
| N | ≤ 0.02 | 0.01 |
| Altotal Al, grain refinement | ≥ 0.02 | 0.03 |
| Fe | balance |
What surface finishes work on P500QH?
Blast and paint, metallize or zinc-coat for atmospheric service; no anodizing — phosphate or primer systems are standard for vessel exteriors.
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 P500QH in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- 1.8874
How much does P500QH cost?
P500QH is a budget-cost steel ($), cheaper than about 90% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
P500QH — frequently asked
What is P500QH used for?
P500QH is typically used for structural tubing, pressure vessel connections, crane and lifting equipment and heavy fabrications. In short: tubular P500Q equivalent; 500 MPa yield hollow section; toughness in welded tube.
What is the yield strength of P500QH?
P500QH has a typical yield strength of 545 MPa (79 ksi) and a tensile strength of 660 MPa (95.7 ksi) — stronger than 70% of steel grades. Strength varies by condition: see the 4 listed tempers.
Is P500QH easy to machine?
Reasonably — machinability is rated fair (45/100, worse than 65% of steel grades). Machines like a 220 HB Q&T alloy steel — rigid setups, coated carbide, moderate speeds; avoid heating the surface above the tempering temperature.
Can P500QH be welded?
Yes — weldability is rated good (65/100). Weldable with low-hydrogen SAW/FCAW/GMAW consumables; control CEV-based preheat (typically 100–150 °C), limit heat input and hold PWHT below the tempering temperature.
What surface finishes work on P500QH?
Blast and paint, metallize or zinc-coat for atmospheric service; no anodizing — phosphate or primer systems are standard for vessel exteriors.
Can P500QH be formed, bent or molded?
Cold bending is possible with generous radii (typically ≥3t transverse); hot forming above the tempering temperature requires re-quench and temper.
What is the maximum service temperature of P500QH?
P500QH is rated for continuous use to about 400°C (752 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
How much does P500QH cost?
P500QH is a budget-cost steel ($), 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 10028-6 Flat products made of steels for pressure purposes — Part 6: Weldable fine grain steels, quenched and tempered — CEN (2020)
- EN 10027-2 Designation systems for steels — Numeric system (material number 1.8874) — CEN (2015)
- ASM Handbook Vol. 1: Properties and Selection — Irons, Steels and High-Performance Alloys — ASM International (1990)
- ASM Handbook Vol. 19: Fatigue and Fracture — ASM International (1996)
- Quenched and tempered pressure-vessel plate datasheets (P460Q–P690Q family) — European heavy-plate mills (2022)
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.