Stock Availability & Production Capability
GR12 plate is produced to order with short lead times. Limited coil stock available — contact us for current availability. Both coil-to-sheet processing (3-12mm) and single-plate rolling (>12mm) routes are active, giving us the flexibility to serve everything from heat exchanger tube sheets to thick pressure vessel components.
Production Routes
| Route | Thickness | Widths (mm) | Length (mm) | Process |
|---|---|---|---|---|
| Route 1: Coil-to-Sheet | 3.0 – 12.0 mm | 1,200 / 1,250 / 1,500 / 2,000 | Cut-to-length (up to 6,000) | Coil → Leveling → Cut → Pickle |
| Route 2: Single-Plate Rolling | 12.1 – 50.0 mm | 1,500 / 2,000 / 2,500 | Up to 6,000 | Slab → Hot Roll → Anneal → Pickle/Blast |
| Route 2: Single-Plate Rolling | 50.1 – 100.0 mm | 1,500 / 2,000 / 2,500 | Up to 4,000 | Slab → Hot Roll → Anneal → Blast |
Why GR12 from ProX Metal
GR2 is the workhorse of the titanium world — it accounts for approximately 80% of all titanium shipments. But it has a critical weakness: crevice corrosion above ~80°C in chloride environments (seawater, brine, chlorinated process streams). Inside crevices — at gasket joints, under deposits, in tube-to-tubesheet joints — oxygen depletes, the TiO2 passive film can't regenerate, and localized corrosion initiates. GR7 (Ti-0.2Pd) solves this problem completely, but its palladium content makes it an order of magnitude more expensive than GR12 — often pricing it out of reach for industrial equipment budgets.
Technical Specifications
GR12 (ASTM Grade 12, UNS R53400, TA10) is a near-alpha titanium alloy with a carefully balanced Mo+Ni addition. The chemistry is specified to deliver crevice corrosion resistance without compromising the inherent advantages of titanium — low density, excellent general corrosion resistance, and biocompatibility.
Chemical Composition (ASTM B265 GR12)
| Element | Specification (wt%) | Metallurgical Role |
|---|---|---|
| Mo | 0.20 – 0.40 | Anodic inhibitor — enables repassivation in oxygen-depleted crevices |
| Ni | 0.60 – 0.90 | Cathodic modifier — lowers hydrogen overpotential, stabilizes passive film |
| Fe | ≤ 0.30 | Controlled impurity |
| O | ≤ 0.25 | Interstitial strengthener |
| C | ≤ 0.08 | Controlled impurity |
| N | ≤ 0.03 | Controlled impurity |
| H | ≤ 0.015 | Strictly limited to prevent hydride embrittlement |
| Ti | Balance | Matrix metal |
Mechanical Properties (Room Temperature, Annealed)
| Property | GR2 | GR12 (Highlighted) | GR7 |
|---|---|---|---|
| Tensile Strength Rm (MPa) | ≥ 345 | ≥ 483 | ≥ 345 |
| Yield Strength Rp0.2 (MPa) | ≥ 275 | ≥ 345 | ≥ 275 |
| Elongation A (%) | ≥ 20 | ≥ 18 | ≥ 20 |
| Hardness (HB) | ~160 | ~200 | ~160 |
| Density (g/cm³) | 4.51 | 4.51 | 4.51 |
| Max Service Temp. | ~150°C | ~300°C | ~150°C |
Welding Essentials
- Filler metal: Use ERTi-12 (AWS A5.16). NEVER use ERTi-2 — it dilutes Mo+Ni in the weld pool, creating a corrosion-vulnerable zone.
- Process: Standard GTAW (TIG) with 100% argon shielding, interpass temperature below 150°C.
- Post-weld: Stress relief at 540–650°C for 1 hour, air cool. Weld color inspection: silver/straw = acceptable; blue/grey = reject.
Grade Comparison: GR2 vs. GR12 vs. GR7
If you're considering GR12, you're likely comparing it against GR2 (the workhorse CP grade) and GR7 (the premium corrosion-resistant grade). Each has its place. Here's how to decide.
Mechanical & Physical Properties
| Property | GR2 (CP Grade 2) | GR12 (Ti-0.3Mo-0.8Ni) | GR7 (Ti-0.2Pd) |
|---|---|---|---|
| Tensile Strength Rm (MPa) | ≥ 345 | ≥ 483 | ≥ 345 |
| Yield Strength Rp0.2 (MPa) | ≥ 275 | ≥ 345 | ≥ 275 |
| Elongation A (%) | ≥ 20 | ≥ 18 | ≥ 20 |
| Hardness (HB) | ~160 | ~200 | ~160 |
| Density (g/cm³) | 4.51 | 4.51 | 4.51 |
| Max Service Temp. | ~150°C | ~300°C | ~150°C |
Corrosion Resistance
| Environment | GR2 | GR12 | GR7 |
|---|---|---|---|
| Seawater (>80°C) | Risk of crevice corrosion | Excellent — Mo+Ni prevents attack | Excellent |
| Hot seawater + chlorine | Severe pitting risk | Good–Excellent | Excellent |
| Dilute reducing acids | Poor — rapid attack | Good (moderate conc.) | Excellent |
| Chloride brines (>100°C) | Risk of crevice corrosion | Excellent | Excellent |
| Crevice corrosion threshold | ~82°C | ≤120°C | ~150°C |
Cost & Availability
| Factor | GR2 | GR12 | GR7 |
|---|---|---|---|
| Material Cost | $ — Most economical | $$ — Moderate premium for Mo+Ni alloying | $$$$ — Palladium content drives substantial premium |
| Cost vs. GR2 | — | Moderate premium — justified by crevice corrosion protection | Order of magnitude higher — palladium is a precious metal |
| Stock Availability | Widely stocked — 228T in ProX inventory | Produced to order — limited coil stock available | Special order — long lead times typical |
| Weldability | Excellent — ERTi-2 filler, simple GTAW | Excellent — requires ERTi-12 filler (do NOT use ERTi-2) | Excellent — ERTi-7 filler (palladium-bearing) |
Decision rule: If your equipment operates in hot chloride environments where GR2's crevice corrosion threshold (~82°C) is exceeded → choose GR12. If your process involves strong reducing acids (hot HCl, concentrated H2SO4) → choose GR7. For all other industrial titanium applications, GR2 remains the most economical and widely available choice.
Industrial Applications
GR12's Mo+Ni synergy makes it the material of choice for equipment operating in hot chloride environments where GR2's crevice corrosion threshold (~82°C) is exceeded but where GR7's palladium premium is unjustified. These are the applications where GR12 delivers the highest value.
Heat Exchanger Tube Sheets & Shells
In MED/MSF desalination plants, tube sheets are exposed to hot seawater on one side and steam on the other. GR12 tube sheets (20-60mm) resist crevice corrosion at tube-to-tubesheet joints — the most vulnerable location in the entire heat exchanger. ASME SB-265 certified for coded pressure vessels up to 300°C.
- Thickness range: 20-60mm typical for tube sheets
- Resists crevice corrosion at tube expansion joints where GR2 fails
- ASME SB-265 compliant for coded pressure vessel applications
- Service temperature up to 300°C — double GR2's limit
Chemical Reactors & Pressure Vessels
Processes involving chlorinated organics, acidic intermediates, or redox cycling require a safety margin GR2 cannot provide. GR12's Mo-Ni synergy delivers continuous protection through the full oxidation-reduction cycle — from oxidizing to reducing conditions and back, without loss of passive film integrity.
- Handles redox cycling environments that destabilize GR2's passive film
- 40% higher strength than GR2 allows thinner vessel walls under ASME Section VIII
- Cost-effective alternative to GR7 for the majority of chemical process streams
- Full traceability with EN 10204 3.1 MTC per heat
Seawater Piping & Flanges
GR2 flanges in seawater service above 80°C are a documented failure point. GR12 flanges eliminate this risk at a fraction of GR7's cost. Many offshore platform material specifications now explicitly require GR12 for hot seawater piping — a specification-driven adoption that reflects years of field failure data.
- Eliminates crevice corrosion at flange gasket surfaces in hot seawater
- Increasingly specified by major offshore operators for hot seawater service
- Substantially more economical than GR7 while delivering equivalent field performance
- Compatible with GR2 piping via ERTi-12 weld transition joints
Hydrometallurgical Equipment
In nickel laterite and copper SX-EW plants, process streams alternate between acidic and neutral conditions. GR12 handles these redox swings without the cost penalty of GR7. The Mo+Ni synergy maintains passive film stability across the full pH and potential range encountered in leaching, extraction, and electrowinning circuits.
- Resists acid alternation in SX-EW and leaching circuits
- Lower total cost of ownership vs GR7 for equivalent service life
- Used in autoclaves, vessels, and piping in pressure oxidation circuits
- Dual-standard certification (ASTM B265 / GB/T 3621 TA10) available
Pulp & Paper Bleaching
Chlorine dioxide and hypochlorite bleaching stages generate highly oxidative, chloride-rich environments. GR12 has demonstrated decades of reliable service in bleach plant washers, towers, and process piping. The Mo+Ni addition provides a critical safety margin against the crevice corrosion that can initiate under deposits in bleach plant equipment.
- Proven multi-decade service life in ClO2 and hypochlorite environments
- Resists under-deposit crevice corrosion in bleach washers and towers
- Direct replacement for GR2 in upgrade projects — same fabrication methods
- Significant cost savings vs GR7 for equivalent corrosion performance
Value-Added Processing — Ready for Your Production Line
Most GR12 buyers don't just need "titanium plate" — they need material that's ready to feed directly into their fabrication line. ProX Metal offers in-house processing for GR12 plate that eliminates secondary operations at your end. Same quality system, full traceability from ingot to finished part.
Precision Slitting
Coil-processed GR12 plate slit to your exact width. Tight tolerance, clean edges, consistent width across the full length. Ideal for tube sheet strips, flange rings, and repetitive fabrication jobs where consistent width saves downstream labor.
Cut-to-Length (CTL)
Coil uncoiled, leveled, and cut to your specified sheet length. Flat, square, ready for your press brake or welding station. Eliminates in-house cutting, material handling, and drop loss.
Custom Shape Cutting
Waterjet or plasma cutting to your drawing. Tube sheet blanks with bolt hole patterns, flange rings, complex gasket shapes — we deliver parts that go straight to machining or assembly.
Manufacturing Quality & Real Production Data
Real Production Record — May 2026
46 Pieces, 3,880 kg of TA10 (GR12) Plate — 19 Custom Dimensions
In May 2026, ProX Metal completed a production run of 46 pieces of TA10 (GR12) 3.0×1500mm plate totaling 3,880 kg. The order included 19 different cut-to-size dimensions ranging from 1,500mm to 5,230mm — demonstrating our capability to deliver custom-dimension GR12 plate for chemical equipment buyers who need specific sizes ready for fabrication.
| Specification | Pieces | Unit Weight | Subtotal |
|---|---|---|---|
| 3.0 × 1500 × 5000 mm | 20 | 101.4 kg | 2,028.0 kg |
| 3.0 × 1500 × 3920 mm | 4 | 79.5 kg | 318.0 kg |
| 3.0 × 1500 × 4230 mm | 4 | 85.8 kg | 343.2 kg |
| 3.0 × 1500 × 5230 mm | 1 | 106.1 kg | 106.1 kg |
| + 15 more sizes | 17 | — | ~1,085 kg |
| Total | 46 | ~3,880 kg |
Certifications & Quality Assurance
- ISO 9001:2015 — Certified quality management system (Certificate No: RLAC25Q1L0163R0S)
- EN 10204 3.1 MTC — Standard with every shipment; includes actual chemistry and mechanical data per heat
- EN 10204 3.2 — Available with TÜV/SGS/BV/Lloyd's third-party verification on request
- 100% UT — Ultrasonic testing for all plates ≥10mm per ASTM E2375 / SEP 1925
- PMI — Positive Material Identification on request for alloy verification
- Full chemical analysis (OES) + mechanical testing per heat — every batch, every time
Export-Grade Packaging
- Plywood wooden crate on steel pallet base — rigid, stackable, forklift-ready
- Steel straps around the exterior of the crate for reinforcement
- Each plate interleaved with protective material to prevent surface contact
- Anti-moisture paper wrapping inside the crate
- Clear shipping marks and handling labels on all sides
- Custom packaging: vacuum sealing, individual wrapping, custom crate dimensions
Strategic Location: Baoji Titanium Valley
ProX Metal is headquartered in Baoji, Shaanxi Province — known globally as "China's Titanium Valley." This strategic location gives us direct access to the world's most concentrated titanium supply chain, skilled workforce, and logistics infrastructure. Over 60% of China's titanium production capacity is within a 50km radius of our factory. From ingot to finished plate, every step happens in Titanium Valley — ensuring quality control, competitive pricing, and rapid delivery.
Frequently Asked Questions
Q: What is GR12 titanium plate?
A: GR12 (ASTM Grade 12, UNS R53400, Chinese designation TA10, EN 3.7105) is a near-alpha titanium alloy containing 0.3% molybdenum and 0.8% nickel. The Mo+Ni addition provides crevice corrosion resistance in hot chloride environments — a capability that commercially pure grades (GR1–GR4) lack — at approximately one-eleventh the cost of palladium-alloyed GR7.
Q: How much does GR12 cost compared to GR2 and GR7?
A: GR12 carries a moderate premium over GR2, reflecting the Mo+Ni alloying that provides crevice corrosion resistance GR2 cannot offer. GR7, by contrast, commands a substantial premium due to its palladium content — often an order of magnitude above GR12. In practical terms: GR12 is the economical step up from GR2 for hot chloride service; GR7 is reserved for the most aggressive reducing acid environments where only palladium will do. Contact us for a current quotation based on your specific thickness and quantity.
Q: Is GR12 stronger than GR2?
A: Yes. GR12 has a minimum tensile strength of 483 MPa versus GR2's 345 MPa (40% higher) and a minimum yield strength of 345 MPa versus GR2's 275 MPa (25% higher). This allows reduced wall thickness in pressure vessel design under ASME Section VIII, which can offset the material cost premium.
Q: Can GR12 be welded to GR2?
A: Yes. GR12 and GR2 are fully compatible for welding. The critical requirement is to use ERTi-12 filler wire (AWS A5.16) — not ERTi-2. Using GR2 filler will dilute the Mo and Ni in the weld pool, creating a zone vulnerable to crevice corrosion. Standard GTAW (TIG) with argon shielding is the recommended process.
Q: What is the Chinese standard equivalent of GR12?
A: GR12 corresponds to TA10 under GB/T 3621. ProX Metal supplies GR12/TA10 with dual-standard certification, enabling use in projects that reference either ASTM or GB/T specifications.
Q: What is the maximum service temperature of GR12?
A: GR12 can be used up to approximately 300°C in industrial service — double the typical limit for GR2 and GR7 (~150°C for corrosion service). This reflects GR12's higher strength retention at elevated temperature. For structural aerospace applications above 300°C, GR5 (Ti-6Al-4V) should be evaluated.
Ready to Upgrade from GR2 to GR12?
Tell us your thickness, dimensions, and application — we'll return a competitive quote within 24 hours.
Send Inquiry →Alternative Contact Methods:
WhatsApp: +86-19992026447 (faster response for urgent inquiries)
Email: info@titaniumprox.com
WeChat: 86-19992026447 (ProX Titanium)
Response Time: Within 24 hours (typically within 2-4 hours during business hours, GMT+8)