Steel A352 Grade LC2-1
ASTM A352 Grade LC2-1 · UNS J42215
ASTM A352 Grade LC2-1 (UNS J42215) is a nickel-molybdenum modified low-temperature alloy steel casting that carries more strength than standard LC2 while keeping toughness for cryogenic pressure components.
Reference datasheet — A352 Grade LC2-1 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
A352 Grade LC2-1 tempers and conditions
A352 Grade LC2-1 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 |
|---|---|---|---|---|---|---|
Annealed | Soft intermediate state used by foundries/machine shops before final quench and temper; not a code-acceptable delivery condition for LC2-1. | 420 | 620 | 24 | 10 HRC | 6.2 % IACS |
Q&T ≤22 HRC | Higher tempering temperature to cap hardness at 22 HRC (237 HB) for wet H2S service while still meeting the LC2-1 minima. | 600 | 760 | 22 | 20 HRC | 5.7 % IACS |
Q&T + post-weld stress relief | Condition of weld-repaired or fabricated castings given a sub-critical PWHT below the original tempering temperature; slight softening, best toughness stability. | 610 | 770 | 21 | 21 HRC | 5.7 % IACS |
QTDefault Quenched and tempered | Standard supply condition for LC2-1 pressure castings; meets 725 MPa UTS / 550 MPa YS and −73 °C Charpy requirements. | 640 | 800 | 20 | 22 HRC | — |
What is A352 Grade LC2-1?
ASTM A352 Grade LC2-1 (UNS J42215) is a nickel-molybdenum modified low-temperature alloy steel casting that carries more strength than standard LC2 while keeping toughness for cryogenic pressure components. Quenched and tempered it reaches 640 MPa yield, 800 tensile and 20% elongation at about 235 HB (22 HRC), and it is also stocked annealed, stress-relieved and in a NACE-controlled hardness condition for sour service. Maximum service temperature is 400 °C, and the alloy has no inherent corrosion resistance. Where the extra strength is not needed, LC2 machines and welds more easily. A352 Grade LC2-1 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). A352 Grade LC2-1 has a yield strength of 640 MPa (92.8 ksi) and a tensile strength of 800 MPa (116 ksi) — stronger than 79% of steel grades. Elongation at break is 20% and the elastic modulus is 205 GPa (29.7 Msi).
What is A352 Grade LC2-1 used for?
- Cryogenic valve bodies
- High-strength low-temperature fittings
- Wellhead and subsea valve castings for sour service
- Pressure-containing pump casings
- High-pressure cold-service flanges and bonnets
- Compressor and gas-processing housings
Advantages
- High strength — 640 MPa (92.8 ksi), better than 79% of steel grades
Limitations
- Limited formability — 15/100, worse than 87% of steel grades
A352 Grade LC2-1 properties
Typical room-temperature values for A352 Grade LC2-1-QT; bars are the position among steel grades.
Physical3
A352 Grade LC2-1 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 Grade LC2-1 has a yield strength of 640 MPa (92.8 ksi) and a tensile strength of 800 MPa (116 ksi) — stronger than 79% of steel grades. Elongation at break is 20% and the elastic modulus is 205 GPa (29.7 Msi).
Thermal6
A352 Grade LC2-1 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 11.7 µm/m·K (6.5 µin/in·°F).
Electrical2
A352 Grade LC2-1 has an electrical resistivity of 3×10⁻⁷ Ω·m.
Chemical & Environmental2
Corrosion resistance is poor (20/100), better than 87% of steel grades.
Sustainability4
Producing a kilogram of A352 Grade LC2-1 takes about 26 MJ of energy and emits 2.2 kg of CO₂ — less than 64% of steel grades. Typical recycled content is 75%.
Manufacturability8
A352 Grade LC2-1's machinability is fair (45/100, worse than 65% of steel grades); weldability fair (45/100); formability poor (15/100).
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. A352 Grade LC2-1 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with A352 Grade LC2-1
Is A352 Grade LC2-1 easy to machine?
Machine in the annealed state where possible; in Q&T (about 235 HB) use rigid setups, carbide inserts at 90–140 m/min and expect abrasive cast skin on the first cut.
Can A352 Grade LC2-1 be welded?
Weldable with matching low-alloy or 2.5Ni/Ni-Cr-Mo consumables and low-hydrogen practice: preheat 150–200 °C, interpass control, and PWHT below the tempering temperature to restore −73 °C toughness.
Can A352 Grade LC2-1 be formed, bent or molded?
Sand or investment cast with generous risering; the alloy is quench-sensitive so wall transitions and section thickness must suit liquid quenching, and full re-heat treatment follows any major weld repair.
A352 Grade LC2-1 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 | ≤ 0.22 | 0.18 |
| Mn | 0.55 – 0.75 | 0.65 |
| Si | ≤ 0.6 | 0.4 |
| P | ≤ 0.04 | 0.02 |
| S | ≤ 0.05 | 0.02 |
| Ni | 2.5 – 3.5 | 3 |
| Cr | 1.35 – 1.85 | 1.6 |
| Mo | 0.3 – 0.6 | 0.45 |
| Fe | balance | — |
What surface finishes work on A352 Grade LC2-1?
No anodizing; shot blast then epoxy/zinc-rich paint, electroless nickel or PTFE coating for corrosion protection; sealing faces are often weld-overlaid with stainless or Stellite.
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 A352 Grade LC2-1 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- J42215
How much does A352 Grade LC2-1 cost?
A352 Grade LC2-1 is a premium-cost steel ($$$), cheaper than about 51% 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.
A352 Grade LC2-1 — frequently asked
What is A352 Grade LC2-1 used for?
A352 Grade LC2-1 is typically used for cryogenic valve bodies, high-strength low-temperature fittings, wellhead and subsea valve castings for sour service, pressure-containing pump casings, high-pressure cold-service flanges and bonnets and compressor and gas-processing housings. In short: highest-strength A352 Ni casting; NACE 22 HRC option; stronger LC2 substitute.
What is the yield strength of A352 Grade LC2-1?
A352 Grade LC2-1 has a typical yield strength of 640 MPa (92.8 ksi) and a tensile strength of 800 MPa (116 ksi) — stronger than 79% of steel grades. Strength varies by condition: see the 4 listed tempers.
Is A352 Grade LC2-1 easy to machine?
Reasonably — machinability is rated fair (45/100, worse than 65% of steel grades). Machine in the annealed state where possible; in Q&T (about 235 HB) use rigid setups, carbide inserts at 90–140 m/min and expect abrasive cast skin on the first cut.
Can A352 Grade LC2-1 be welded?
With care — weldability is rated fair (45/100). Weldable with matching low-alloy or 2.5Ni/Ni-Cr-Mo consumables and low-hydrogen practice: preheat 150–200 °C, interpass control, and PWHT below the tempering temperature to restore −73 °C toughness.
What surface finishes work on A352 Grade LC2-1?
No anodizing; shot blast then epoxy/zinc-rich paint, electroless nickel or PTFE coating for corrosion protection; sealing faces are often weld-overlaid with stainless or Stellite.
Can A352 Grade LC2-1 be formed, bent or molded?
Sand or investment cast with generous risering; the alloy is quench-sensitive so wall transitions and section thickness must suit liquid quenching, and full re-heat treatment follows any major weld repair.
What is the maximum service temperature of A352 Grade LC2-1?
A352 Grade LC2-1 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.
What is the difference between A352 Grade LC2-1-QT and A352 Grade LC2-1-ANN?
QT is the default condition — standard supply condition for LC2-1 pressure castings; meets 725 MPa UTS / 550 MPa YS and −73 °C Charpy requirements. ANN: soft intermediate state used by foundries/machine shops before final quench and temper; not a code-acceptable delivery condition for LC2-1. Yield strength is 640 MPa in QT versus 420 MPa in ANN.
How much does A352 Grade LC2-1 cost?
A352 Grade LC2-1 is a premium-cost steel ($$$), cheaper than about 51% 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
- ASTM A352/A352M — Steel Castings, Ferritic and Martensitic, for Pressure-Containing Parts, Suitable for Low-Temperature Service — ASTM International (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, 6th ed. — Steel Founders' Society of America / ASM (1995)
- ANSI/NACE MR0175 / ISO 15156 — Materials for use in H2S-containing environments — NACE/ISO (2020)
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.