Steel A352 LCC N+T-PWHT
Heat-treated state
ASTM A352 LCC · UNS J02505
Condition of production castings with major weld repairs subjected to PWHT below the tempering temperature; slightly lower strength, retained −46 °C toughness.
Values for the N+T-PWHT condition
Other A352 LCC tempers and conditions
A352 LCC is listed in 3 conditions; see the grade overview at A352 LCC.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
N+T-PWHTThis page normalized/tempered casting after post-weld heat treatment of weld repairs | Condition of production castings with major weld repairs subjected to PWHT below the tempering temperature; slightly lower strength, retained −46 °C toughness. | 300 | 510 | 27 | 150 HB | 10 % IACS |
N+TDefault Normalized and tempered | Standard supply condition for LCC valve bodies, fittings and pressure parts; best balance of strength, toughness and cost. | 315 | 525 | 26 | 155 HB | — |
Quenched and tempered | Chosen for heavy sections or when higher low-temperature CVN energy and more uniform through-thickness properties are needed. | 360 | 560 | 27 | 170 HB | — |
What is A352 LCC N+T-PWHT?
A352 LCC N+T-PWHT is A352 LCC heat treated to N+T-PWHT — condition of production castings with major weld repairs subjected to PWHT below the tempering temperature; slightly lower strength, retained −46 °C toughness. A352 LCC N+T-PWHT has a yield strength of 300 MPa (43.5 ksi) and a tensile strength of 510 MPa (74 ksi) — weaker than 86% of steel grades. Elongation at break is 27% and the elastic modulus is 202 GPa (29.3 Msi). A352 LCC N+T-PWHT has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,425°C (2,597 °F). N+T is the default condition FabDigit quotes; N+T-PWHT is available on request or by drawing note.
Advantages
- Easy to machine — 64/100, better than 92% of steel grades
- Low embodied carbon — 1.9 kg CO₂/kg, better than 92% of steel grades
- Conducts heat well — 50 W/m·K (28.9 BTU/hr·ft·°F), better than 87% of steel grades
- Ductile — tolerates forming and impact — 27%, better than 86% of steel grades
- High electrical conductivity — 10 % IACS, better than 83% of steel grades
Limitations
- Low strength — 300 MPa (43.5 ksi), worse than 86% of steel grades
- Hard to polish — 45/100, worse than 84% of steel grades
- Limited formability — 22/100, worse than 76% of steel grades
A352 LCC N+T-PWHT properties
Typical room-temperature values for A352 LCC N+T-PWHT; 22 are specific to this condition. Other listed values are A352 LCC reference data and may not represent this condition. Bars are the position among steel grades.
Physical3
A352 LCC N+T-PWHT has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,425°C (2,597 °F).
Mechanical15
A352 LCC N+T-PWHT has a yield strength of 300 MPa (43.5 ksi) and a tensile strength of 510 MPa (74 ksi) — weaker than 86% of steel grades. Elongation at break is 27% and the elastic modulus is 202 GPa (29.3 Msi).
Thermal6
A352 LCC N+T-PWHT is rated for continuous service to 425°C (797 °F). It conducts heat at 50 W/m·K (28.9 BTU/hr·ft·°F), better than 87% of steel grades. Thermal expansion is 11.9 µm/m·K (6.61 µin/in·°F).
Electrical3
A352 LCC N+T-PWHT conducts electricity at 10 % IACS, better than 83% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (12/100), worse than 53% of steel grades.
Sustainability4
Producing a kilogram of A352 LCC N+T-PWHT takes about 24 MJ of energy and emits 1.9 kg of CO₂ — less than 97% of steel grades. Typical recycled content is 85%.
Manufacturability7
A352 LCC N+T-PWHT's machinability is good (64/100, better than 92% of steel grades); weldability very good (80/100); formability poor (22/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with A352 LCC N+T-PWHT
Is A352 LCC easy to machine?
Machines like WCC/A216 carbon steel castings — carbide tooling, 120–180 m/min; watch for hard skin, sand inclusions and shrinkage porosity near risers.
Can A352 LCC be welded?
Readily welded with E7018 / ER70S-x low-hydrogen consumables; preheat 100–150 °C for heavy sections and re-temper or PWHT major repairs to preserve −46 °C CVN.
Can A352 LCC be formed, bent or molded?
Green sand or no-bake sand casting with generous risering; mandatory normalize+temper (or quench+temper) after casting to refine grain and pass low-temperature impact tests.
What surface finishes work on A352 LCC?
Shot blast then paint, epoxy or zinc/nickel plating — the alloy has no inherent corrosion resistance; passivation/anodizing not applicable.
A352 LCC 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 |
|---|---|---|
| Cmax per ASTM A352 LCC | ≤ 0.25 | 0.22 |
| Mn | ≤ 1.2 | 1 |
| Si | ≤ 0.6 | 0.45 |
| P | ≤ 0.04 | 0.02 |
| S | ≤ 0.05 | 0.02 |
| Curesidual | ≤ 0.3 | 0.15 |
| Niresidual | ≤ 0.5 | 0.2 |
| Crresidual | ≤ 0.5 | 0.2 |
| Moresidual | ≤ 0.2 | 0.05 |
| Vresidual; total residuals ≤ 1.00 % | ≤ 0.03 | 0.01 |
| Fe | balance | — |
A352 LCC N+T-PWHT — frequently asked
What is A352 LCC N+T-PWHT used for?
A352 LCC N+T-PWHT is typically used for low-temperature valve bodies, pump casings and cryogenic pipeline fittings. In short: cold-service pressure castings; impact tested at −46 °C; strength tier above LCB.
What is the yield strength of A352 LCC N+T-PWHT?
A352 LCC N+T-PWHT has a typical yield strength of 300 MPa (43.5 ksi) and a tensile strength of 510 MPa (74 ksi) — weaker than 86% of steel grades. Strength varies by condition: see the 3 listed tempers.
Is A352 LCC N+T-PWHT easy to machine?
Reasonably — machinability is rated good (64/100, better than 92% of steel grades). Machines like WCC/A216 carbon steel castings — carbide tooling, 120–180 m/min; watch for hard skin, sand inclusions and shrinkage porosity near risers.
Can A352 LCC N+T-PWHT be welded?
Yes — weldability is rated very good (80/100). Readily welded with E7018 / ER70S-x low-hydrogen consumables; preheat 100–150 °C for heavy sections and re-temper or PWHT major repairs to preserve −46 °C CVN.
What surface finishes work on A352 LCC N+T-PWHT?
Shot blast then paint, epoxy or zinc/nickel plating — the alloy has no inherent corrosion resistance; passivation/anodizing not applicable.
Can A352 LCC N+T-PWHT be formed, bent or molded?
Green sand or no-bake sand casting with generous risering; mandatory normalize+temper (or quench+temper) after casting to refine grain and pass low-temperature impact tests.
What is the maximum service temperature of A352 LCC N+T-PWHT?
A352 LCC N+T-PWHT is rated for continuous use to about 425°C (797 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
Sources
- ASTM A352/A352M — Steel Castings, Ferritic and Martensitic, for Pressure-Containing Parts, Suitable for Low-Temperature Service — ASTM International (2023)
- ASME BPVC Section II Part D — Material Properties — ASME (2023)
- ASME B16.34 — Valves, Flanged, Threaded and Welding End — ASME (2020)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels, and High-Performance Alloys — ASM International (1990)
- Steel Castings Handbook (SFSA) — Steel Founders' Society of America (1995)
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.