ASTM B424 Nickel Alloy Plate Sheet Strip

 

Element	UNS N08825 (Alloy 825)	UNS N08221	UNS N08821
Nickel (Ni)	38.0 – 46.0	39.0 – 44.0	39.0 – 44.0
Chromium (Cr)	19.5 – 23.5	19.0 – 22.0	19.0 – 22.0
Iron (Fe)	22.0 min (balance)	22.0 – 30.0	22.0 – 30.0
Molybdenum (Mo)	2.5 – 3.5	5.0 – 6.5	5.0 – 6.5
Copper (Cu)	1.5 – 3.0	1.5 – 2.5	1.5 – 2.5
Titanium (Ti)	0.6 – 1.2	0.6 – 1.0	0.6 – 1.0
Carbon (C), max	0.05	0.05	0.05
Manganese (Mn), max	1.0	1.0	1.0
Silicon (Si), max	0.5	0.5	0.5
Phosphorus (P), max	0.03	0.03	0.03
Sulfur (S), max	0.03	0.03	0.03
Aluminum (Al), max	0.2	0.2	0.2

Key differentiators: N08825 contains 2.5–3.5% Mo and 1.5–3.0% Cu for acid resistance. N08221 and N08821 offer higher molybdenum (5.0–6.5%) for enhanced pitting resistance.

 

Property	UNS N08825	UNS N08221	UNS N08821
Tensile Strength (MPa)	585	585	585
Tensile Strength (ksi)	85	85	85
Yield Strength Rp0.2 (MPa)	240	240	240
Yield Strength Rp0.2 (ksi)	35	35	35
Elongation (%), min	30	30	30
Hardness (HRB), typical	≤ 85	≤ 85	≤ 85

Notes: Values shown are minimums per ASTM B424. For thicknesses below 1.5mm (sheet/strip), elongation requirements may be adjusted based on product dimensions.

 

Understanding a supplier’s actual production capability helps buyers assess reliability and scalability. Below are realistic, verifiable advantages of our ASTM B424 Nickel Alloy Plate Sheet Strip production.

Large-Scale Melting & Refining Capacity

Parameter	Capability
Melting process	VIM + VAR / AOD + LF (secondary refining)
Annual melting capacity	15,000+ metric tons of nickel alloys
Heat size	5 to 35 metric tons per heat (flexible for small and large orders)
Quality control	Spectrometer analysis for each heat, traceable from melt to final product

Advanced Rolling & Heat Treatment Facilities

Product Form	Rolling Mill Type	Thickness Range	Width Range
Plate	4-high hot rolling mill	3.0 – 50.0 mm	600 – 3000 mm
Sheet	20-high cold rolling mill	0.5 – 3.0 mm	600 – 1500 mm
Strip	Tandem cold mill	0.1 – 4.0 mm	10 – 600 mm

Heat treatment: Continuous roller hearth furnaces with protective atmosphere (hydrogen or dissociated ammonia) ensure bright annealing and consistent mechanical properties across the full coil or plate.

Strict Dimensional Tolerances

Parameter	Achievable Tolerance
Thickness (plate)	±0.10mm to ±0.25mm depending on thickness (meets or exceeds ASTM A480)
Thickness (sheet/strip)	±0.02mm to ±0.08mm
Width (slit strip)	±0.5mm
Flatness (plate)	≤ 3mm per 1500mm length

Surface Quality Control

All ASTM B424 nickel alloy sheets and strips undergo:

Automated pinhole detection system (for thin gauge strip)

Visual inspection under high-intensity lighting

Eddy current testing (optional, for critical applications)

Oxide removal via pickling, blast cleaning, or bright annealing

Production Flexibility

Order Size	Typical Lead Time	Minimum Quantity
Standard stock sizes	15–25 days	1 metric ton per grade/size
Custom dimensions	30–45 days	3 metric tons per grade
Trial sample order	10–15 days	Negotiable

Real capacity statement: Our production lines operate 24/7 with an average monthly output of 1,200 metric tons of nickel alloy flat products. We maintain a dedicated inventory of ASTM B424 nickel alloy plate and sheet in the most common sizes (6mm, 8mm, 10mm thicknesses; 1500mm width) for immediate processing.

 

Proper packaging ensures that your ASTM B424 nickel alloy plate, sheet, and strip arrive at your facility in perfect condition – free from scratches, corrosion, or deformation.

Packaging Methods by Product Form:

Product Form	Packaging Standard	Additional Protection
Plate (3mm – 50mm)	Steel-framed plywood crates	Kraft paper interleaving + edge protectors
Sheet (0.5mm – 3mm)	Flat-packed in plywood cases	Plastic film wrap + moisture barrier
Strip (coiled)	Wooden spools or steel pallets	Anti-rust paper + spiral wrapping + stretch film