Why GR1 from ProX Metal?
GR1 is the highest-purity grade of commercially pure titanium. Its ultra-low interstitial content (Fe, O) gives it the lowest strength and highest ductility among all CP grades — making it the material of choice for deep drawing, complex stamping, and explosive cladding applications where formability is everything.
Industry-Leading Purity
Our GR1 averages Fe 0.017% and O 0.034% — just 8.5% and 19% of the ASTM B265 maximum limits. Less interstitial content means softer, more formable material that won't crack during deep drawing.
Maximum Formability
With YS as low as 166 MPa and EL up to 46.8%, ProX GR1 bends where other titanium grades break. Ideal for PHE pressing, complex stamping, and explosive cladding — applications where formability is the primary requirement.
257.5 Tons Ready to Ship
Cold-rolled bright strip: 0.4-2.0mm, widths 1000/1220/1250mm. Hot-rolled pickled plate: 3.0-12.0mm, widths 1500/2000mm. 36 batches across all thicknesses. Mixed-size orders from inventory — no minimum per thickness.
Available Dimensions & Stock
GR1 titanium comes in two distinct product forms, each serving different applications. Understanding the difference helps you choose the right material for your manufacturing process.
Cold-Rolled Bright Strip (0.4 – 2.0 mm)
Produced via cold rolling followed by bright annealing in a controlled-atmosphere furnace. The result: a smooth, reflective surface with tight thickness tolerance (±0.05mm) and uniform mechanical properties across the entire coil length. This is the premium product form for stamping, pressing, and forming applications.
| Thickness (mm) | Width Options (mm) | Stock (Tons) | Batches | Surface |
|---|---|---|---|---|
| 0.4 | 1000 / 1220 | 49.9 | 8 | Bright Annealed |
| 0.5 | 1000 / 1220 | 23.4 | 3 | Bright Annealed |
| 0.6 | 1000 / 1220 | 37.5 | 5 | Bright Annealed |
| 0.7 – 0.8 | 1220 | 23.4 | 4 | Bright Annealed |
| 1.0 | 1000 / 1220 / 1250 | 50.0 | 6 | Bright Annealed |
| 1.2 – 1.5 | 1000 / 1220 / 1250 | 53.0 | 8 | Bright Annealed |
| 2.0 | 1220 | 6.0 | 1 | Bright Annealed |
Hot-Rolled Pickled Plate (3.0 – 12.0 mm)
For applications requiring thicker GR1 material — such as explosive cladding backer plates, equipment lining, and structural components — we offer hot-rolled pickled plates. The acid pickling process removes the dark oxide scale from hot rolling, leaving a clean, uniform matte surface ready for fabrication.
| Thickness (mm) | Width Options (mm) | Length (mm) | Surface | Availability |
|---|---|---|---|---|
| 3.0 | 1500 / 2000 | 6000 | Pickled (HRAP) | In Stock |
| 6.0 | 1500 | 6000 | Pickled (HRAP) | In Stock |
| 8.0 | 1500 / 2000 | 6000 | Pickled (HRAP) | In Stock |
| 10.0 | 1500 | 6000 | Pickled (HRAP) | In Stock |
| 12.0 | 1500 | 6000 | Pickled (HRAP) | In Stock |
Production Capability (Custom Orders)
| Parameter | Capability |
|---|---|
| Thickness Range | 0.4 – 20 mm (coil-based production) |
| Width Range | 1000 / 1220 / 1250 mm (≤ 2.0mm, cold-rolled) 1500 / 2000 mm (> 2.0mm, hot-rolled) |
| Length Range | Custom cut to requirement (common: 2000 / 3000 / 6000 mm) |
| Production Standard | ASTM B265, ASME SB-265, AMS 4901, DIN 17860, GB/T 3621 |
| Delivery Condition | Annealed (M), cold-rolled bright, hot-rolled pickled, or per customer specification |
Key Stock Facts
- Total GR1 (TA1/TA1G) cold-rolled bright strip: 257.5 metric tons (36 batches, as of Sep 2025)
- Width breakdown: 1220mm = 179.3T | 1250mm = 37.5T | 1000mm = 40.7T
- Both TA1 and TA1G grades in stock — all certified as GR1 under ASTM B265
- Hot-rolled pickled plates also available in 3.0-12.0mm
- Mixed-size orders: Buy exactly what you need — no minimum per thickness
- Don't see your size? Contact us — we produce 0.4-20mm to your exact specification.
Technical Specifications
GR1 is defined by its ultra-low interstitial content (Fe, O, N, C) — the elements that determine strength, ductility, and formability in commercially pure titanium. Below are ProX Metal's actual measured values compared to the ASTM B265 standard.
Chemical Composition (wt%)
Based on actual EN 10204 3.1 MTC data from our GR1 cold-rolled strip production. Typical values from batch TA1-259070 (1.0×1220mm). Range values from 36 production batches.
| Element | ASTM B265 GR1 Standard | ProX Metal Typical | ProX Range (36 Batches) | Verdict |
|---|---|---|---|---|
| Ti | Balance | Balance | Balance | — |
| Fe | ≤ 0.200 | 0.017 | 0.010 – 0.026 | 87-95% below limit |
| O | ≤ 0.180 | 0.034 | 0.032 – 0.044 | 76-82% below limit |
| C | ≤ 0.080 | 0.011 | 0.003 – 0.020 | 75-96% below limit |
| N | ≤ 0.030 | 0.003 | 0.001 – 0.006 | 80-97% below limit |
| H | ≤ 0.015 | 0.0011 | 0.0006 – 0.0023 | 85-96% below limit |
| Others (each) | ≤ 0.10 | ≤ 0.10 | ≤ 0.10 | Compliant |
| Others (total) | ≤ 0.40 | ≤ 0.40 | ≤ 0.40 | Compliant |
Mechanical Properties (Room Temperature, Annealed)
| Property | ASTM B265 GR1 Standard | ProX Metal Typical | ProX Range (36 Batches) | Verdict |
|---|---|---|---|---|
| Tensile Strength (Rm) | ≥ 240 MPa | 300.5 MPa | 224.5 – 319.3 MPa | 25% above minimum (avg) |
| Yield Strength (Rp0.2) | 138 – 310 MPa | 215.8 MPa | 165.9 – 231.7 MPa | Well within range |
| Elongation (A50) | ≥ 24% | 40.28% | 37.82 – 46.80% | 68% above minimum |
| Hardness (HV1) | — | 102.4 | 100 – 124 | Soft, formable |
| Grain Size | — | 7.0 | 5.0 – 8.5 | Fine, uniform |
Manufacturing Process
- Melting: VAR (Vacuum Arc Remelting) — Double Melted for chemical homogeneity
- Hot Rolling: Controlled temperature, multi-pass reduction from slab to coil
- Cold Rolling: Precision cold reduction to target thickness with tight gauge control
- Bright Annealing: Continuous annealing in controlled atmosphere (Argon) for bright, oxide-free surface
- Leveling & Slitting: Precision leveled, slit to width, cut to length per customer specification
Surface Finishes & Processing Capabilities
GR1 titanium serves two very different surface quality requirements depending on thickness and application. Understanding the difference ensures you get the right material for your process.
Available Surface Finishes for GR1
| Finish | Thickness Range | Process | Appearance | Best For |
|---|---|---|---|---|
| Cold-Rolled Bright Annealed | 0.4 – 2.0 mm | Cold rolling + bright annealing in argon atmosphere | Smooth, reflective, metallic luster | PHE plates, stamping parts, precision components, architectural cladding |
| Hot-Rolled Pickled (HRAP) | 3.0 – 12.0 mm | Hot rolling + acid pickling to remove oxide scale | Matte gray, uniform finish | Explosive cladding, equipment lining, structural components |
| Black Surface | 3.0+ mm | Hot-rolled, as-rolled (no pickling) | Dark oxide scale | Further processing, machining blanks, cost-sensitive applications |
Value-Added Processing — Ready for Your Production Line
Most GR1 buyers don't just need "titanium sheet" — they need material that's ready to feed directly into their stamping press, slitting line, or welding station. ProX Metal offers in-house processing that eliminates secondary operations at your end.
Precision Slitting
Master coils slit to your exact width requirement. Tight tolerance, clean edges, consistent width across the full coil length. Ideal for automated PHE stamping lines that require specific coil widths.
Cut-to-Length (CTL)
Coil uncoiled, leveled, and cut to your specified sheet length. Flat, square, ready for your press or fabrication cell. Eliminates in-house cutting and material handling.
Custom Shape Cutting
Waterjet, plasma, or shear cutting to your drawing. Complex shapes, bolt holes, notches — we'll deliver parts that go straight to assembly. Ideal for equipment lining and structural fabricators.
Typical Applications
GR1's defining advantage is its combination of high purity, low strength, and extreme ductility. This makes it the grade of choice for applications where the material must flow, stretch, or bond — rather than simply hold a shape.
Plate Heat Exchangers (PHE)
This is GR1's flagship application. PHE manufacturers need thin-gauge titanium that can be pressed into complex corrugated patterns without cracking, thinning, or springback. ProX GR1 cold-rolled bright strip — with Fe as low as 0.010% and EL up to 46.8% — is engineered for exactly this.
- Thickness: 0.4 – 0.8mm (most common: 0.5mm and 0.6mm)
- Width: 1220mm is the industry standard for PHE pressing lines
- Surface: Bright annealed — smooth, clean, ready for pressing
- Formability: EL 40%+ means deep corrugation patterns without cracking
- Available as master coil or slit to your press width
Deep Drawing & Complex Stamping
When your part requires the material to stretch significantly — think cylindrical cups, complex housings, or intricate formed components — GR1 is the only CP titanium grade that can handle it. GR2 and higher grades will crack or require intermediate annealing, adding cost and cycle time.
- YS as low as 166 MPa — the material yields before it fractures
- EL up to 46.8% — massive deformation capacity before failure
- Uniform grain structure (ASTM 7-8) for consistent forming behavior
- Available in coil form for progressive die stamping lines
Explosive Cladding (Clad Plate)
GR1 is the preferred cladding material for titanium-steel explosive bonding. Its low strength and high ductility allow it to deform uniformly under the explosive shock wave, creating a metallurgical bond with the steel backer plate without cracking or debonding.
- Thickness: 3.0 – 12.0mm (hot-rolled pickled plate)
- Width: 1500 / 2000mm — matches standard steel backer dimensions
- Low YS ensures the titanium layer conforms to the steel substrate during detonation
- Used in pressure vessels, chemical reactors, and heat exchangers requiring corrosion barrier + structural strength
Equipment Fabrication, Lining & Anodes
GR1's slightly better corrosion resistance (due to lower Fe/O content) makes it the preferred CP grade for extreme chemical environments — particularly in reducing acid service where even trace iron can catalyze corrosion. Common applications include reactor linings, anode baskets, and electroplating equipment.
- Thin-gauge GR1 (0.5-1.5mm) for loose-lined vessels and tanks
- Thicker GR1 plate (3-12mm) for welded linings and structural anodes
- Lower Fe content (<0.03%) reduces risk of iron-catalyzed corrosion in HCl service
- Excellent weldability — TIG welding with argon shielding, no PWHT required
Grade Comparison: GR1 vs. GR2 vs. 316L Stainless Steel
If you're considering GR1, you're likely comparing it against two alternatives: GR2 (the workhorse CP grade) and 316L stainless steel (the default corrosion-resistant alloy). Each has its place. Here's how to decide.
GR1 vs. GR2 — Which CP Grade for Your Application?
| Factor | GR1 (CP Grade 1) | GR2 (CP Grade 2) |
|---|---|---|
| Purity (Fe + O) | Fe ≤ 0.20, O ≤ 0.18 — highest purity CP grade | Fe ≤ 0.30, O ≤ 0.25 — still very pure, but higher than GR1 |
| Tensile Strength | ≥ 240 MPa — ~30% lower than GR2 | ≥ 345 MPa — better for structural applications |
| Yield Strength | 138 – 310 MPa (ProX typical: 216 MPa) | 275 – 450 MPa (ProX typical: 326-345 MPa) |
| Elongation (Ductility) | ≥ 24% (ProX typical: 40.3%) — best formability | ≥ 20% (ProX typical: 29-30%) — good, but less than GR1 |
| Formability | Excellent — ideal for deep drawing, complex stamping, explosive cladding | Good — suitable for most standard forming operations |
| Corrosion Resistance | Slightly better — lower Fe/O content beneficial in reducing acids | Excellent — the industry standard for chemical equipment |
| Cost (Relative) | $$ (Slightly higher — lower production volume) | $ (Lowest — highest volume, widest availability) |
| Availability | Less common — limited to specific suppliers with GR1 capability | Most widely stocked CP grade — largest size range |
| Best For | PHE plates, deep drawing, explosive cladding, extreme forming | Chemical equipment, pressure vessels, heat exchangers, general industrial |
Decision rule: If your manufacturing process involves forming (stamping, pressing, deep drawing, explosive bonding) → choose GR1. If your process involves fabricating (welding, cutting, assembling structural components) → choose GR2. GR1 is a forming-grade material; GR2 is a fabrication-grade material.
GR1 Titanium vs. 316L Stainless Steel — The Formability Question
For stamped and pressed components, 316L is often the default choice — until it isn't. When corrosion resistance, weight, or forming limits push 316L past its capabilities, GR1 titanium becomes the answer.
| Factor | GR1 Titanium | 316L Stainless Steel |
|---|---|---|
| Formability (Deep Drawing) | Excellent — EL 40%+, low YS, minimal springback. Can achieve deeper draws without intermediate annealing. | Good — but work-hardens rapidly. Multiple annealing steps often required for deep draws. |
| Corrosion Resistance (Chlorides) | Virtually immune to chloride pitting, crevice corrosion, and SCC at all temperatures | Susceptible to pitting and SCC above 50-60°C in chloride environments |
| Weight | 4.51 g/cm³ — ~45% lighter. Thinner gauge possible due to corrosion resistance. | 8.0 g/cm³ — heavier formed parts, higher shipping and handling costs |
| Upfront Material Cost | Higher per kg (~5-8× 316L on weight basis) | Lower per kg — but total cost of ownership may be higher |
| Service Life | 20+ years in aggressive environments; zero corrosion allowance needed | 10-15 years typical; 3-6mm corrosion allowance adds weight and cost |
| Thermal Conductivity | 16 W/m·K — excellent for heat transfer applications (PHE) | 15 W/m·K — slightly lower |
When to choose GR1 over 316L: If your formed component will see chlorides, seawater, or oxidizing acids — and especially if it's a thin-gauge stamped part where weight and corrosion matter — GR1 is the technically superior choice. The higher material cost is offset by longer service life, zero maintenance, and the ability to form more complex geometries in fewer steps.
Factory & Quality — Why ProX Metal
ISO 9001:2015 Certified Quality System
ProX Metal operates under a fully implemented ISO 9001:2015 quality management system, audited and certified by LangShi Certification (Beijing) Co., Ltd., an CNCA-accredited body. Our quality system covers the complete process from raw material sourcing through production, inspection, and final shipment.
- Certificate No: RLAC25Q1L0163R0S
- Scope: Titanium plate, titanium rod, titanium coil segmentation processing and sales
- Valid: March 17, 2025 – March 16, 2028
Full In-House Production Chain
Unlike trading companies that simply resell, ProX Metal controls the entire manufacturing process in-house. From VAR double-melted ingot sourcing to hot rolling, cold rolling, bright annealing, leveling, slitting, and precision cutting — every step happens under our roof.
This vertical integration means:
- Lower cost: No middlemen markups — you pay factory-direct pricing
- Faster delivery: We control production scheduling, not a third-party mill
- Consistent quality: One quality system, one team, one standard — from ingot to finished strip
- Flexible MOQ: We can run small batches without the overhead of outsourced production
Key Production Equipment
3-Ton VAR Melting Furnace
Vacuum Arc Remelting — the starting point of every ProX Metal titanium product. Double melting ensures chemical homogeneity and eliminates inclusions.
Vacuum Annealing Furnace
Precision-controlled bright annealing in argon atmosphere ensures oxide-free surface and consistent mechanical properties across the entire coil.
Uncoiling & Leveling Line
Coils are uncoiled, leveled, and cut to length on our in-house line. This gives us the flexibility to produce any sheet size from coil stock.
Stretch Leveler
Precision stretch leveling ensures flatness within tolerance — critical for PHE plate pressing and stamping applications.
6300-Ton Forging Press
Massive forging capability for primary breakdown of titanium ingots and billets. The foundation of our structural integrity.
Finished Product Warehouse
257.5 metric tons of GR1 cold-rolled strip organized by thickness, width, and heat number. Full traceability from warehouse back to original ingot.
EN 10204 3.1 Mill Test Certificate — Every Batch
Every shipment from ProX Metal includes an EN 10204 Type 3.1 MTC with actual measured values for your specific production batch:
- Heat number and lot number for full material traceability
- Actual chemical composition — all specified elements with measured values
- Actual mechanical properties — Rm, Rp0.2, A50% (two test specimens per lot)
- Heat treatment details — temperature, holding time, cooling method
- Surface quality and dimensional inspection results
- Formal statement of compliance with order requirements and applicable standards
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 sheet/strip 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.
Frequently Asked Questions
Q: What's the difference between GR1 and TA1/TA1G?
A: GR1 is the ASTM B265 designation. TA1 and TA1G are the Chinese GB/T designations for the same grade. All three meet ASTM B265 GR1 chemistry and mechanical requirements. The key distinction is between TA1 and TA1G:
Purity: TA1G has stricter limits on Fe (≤0.10% vs. TA1's ≤0.15%) and H (≤0.0015% vs. TA1's ≤0.003%), making it the higher-purity variant.
Surface: TA1G achieves a finer surface finish (Ra ≤ 0.8 μm vs. TA1's Ra ≤ 1.6 μm).
Standards: TA1G complies with ISO 5832-2 (international medical standard) with higher biocompatibility requirements; TA1 primarily meets Chinese GB standards.
In short, TA1G is a refined version of TA1 — lower impurities, smoother surface, medical-grade certification — at a slightly higher cost. Both are produced in-house by ProX Metal and certified as GR1 under ASTM B265. We stock both; tell us your application and we'll recommend the right one.
Q: What is the minimum order quantity (MOQ) for GR1?
A: There is no strict MOQ. We ship from a single coil to full container loads. For the best pricing, we recommend at least 500 kg per specification. Cold-rolled strip is typically sold by coil weight (~4-10 tons per coil); we can also provide cut-to-length sheets in smaller quantities.
Q: Can you slit the coil to my exact width?
A: Yes. Our in-house slitting line can process master coils (1000/1220/1250mm) down to your specified width. We maintain tight width tolerance and clean slit edges. This is a standard value-added service — tell us your target coil width and we'll include slitting in your quote.
Q: What surface finish do I get on GR1 cold-rolled strip?
A: Our standard GR1 cold-rolled strip is bright annealed — a smooth, reflective, metallic finish achieved through annealing in a controlled argon atmosphere. No oxide scale, no pickling residue. Ready for direct use in PHE pressing, stamping, or fabrication. If you need a pickled (matte) finish, we can accommodate on request.
Q: How do GR1 mechanical properties compare to the ASTM B265 standard?
A: Our GR1 consistently outperforms ASTM B265 minimum requirements. Typical elongation is 40.3% vs. the 24% minimum — that's 68% above the standard. This matters because higher elongation directly translates to better formability and fewer cracked parts on your press line.
Q: What is your typical lead time for GR1?
A: For in-stock cold-rolled strip: 3-7 days from order confirmation. For custom production (non-stock thickness or width): 20-35 days. Express shipping options are available for urgent orders.
Q: What payment terms do you accept?
A: Standard terms: 30% T/T advance, 70% before shipment (or against copy of documents). For established relationships: L/C at sight. Flexible terms can be discussed for long-term contracts.
Q: Do you provide samples for testing?
A: Yes. We can provide A4-size sample pieces of our standard GR1 cold-rolled strip at your requested thickness. The sample is free; you cover courier shipping. For larger trial orders, we offer competitive small-quantity pricing.
Ready to Form with the Purest Titanium?
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