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XM-19 Alloy Round Bar Diameter 5 - 300mm Stainless Steel Bar Hot Rolled SS Bar
| Place of Origin | China |
|---|---|
| Brand Name | DELTA |
| Certification | ISO |
| Model Number | XM-19 |
| Minimum Order Quantity | 10 kg |
| Price | 15 - 20 USD/Kg |
| Packaging Details | standard packing for export |
| Delivery Time | 5 - 12 days based on the quantity |
| Payment Terms | L/C, T/T, Western Union |
| Supply Ability | 3 Ton per week |
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xProduct Details
| Products | Stainless Steel Bar | Grade | XM-19 |
|---|---|---|---|
| Diameter | 5-300mm | Length | Custom Cutting Any Length As Request |
| Standard | ASTM EN | Service | Cutting |
| Loading Port | Shanghai Port | Surface | Bright,black |
Product Description
XM-19 Alloy Round Bar Diameter 5 - 300mm Stainless Steel Bar Hot Rolled SS Bar
More Specification Informations
| Products Name | XM-19 Stainless Steel Bar |
| Diameter | 5-300mm |
| Length | custom cutting any length as request |
| Surface | bright, Black,pickling,polishing |
| Brand | DELTA |
| Service | cutting, Polishing |
| MOQ | 2 Kgs |
| Other Type | bar, strip,coil,pipe.sheet, plate,wire.etc |
| Packing | Wooden box |
| Loading Port | Shanghai Port |
| Price term | EXW,FOB,CIF,CFR |
| Deliver time | within 12 days |
XM-19 Alloy Round Bar Diameter 5 - 300mm Stainless Steel Bar Hot Rolled SS Bar
Overview of XM-19 Hot Rolled Stainless Steel Round Bar
XM-19 (also known as UNS S20910 or Nitronic 50) hot rolled stainless steel round bar represents a breakthrough in austenitic stainless steel technology, offering an unrivaled combination of high strength and superior corrosion resistance at a competitive price point. Engineered with a unique manganese-nitrogen 强化 composition, this alloy addresses the limitations of conventional stainless steels like 316 and 317L, making it a preferred choice across demanding industrial sectors.
Our XM-19 hot rolled round bars are available in a comprehensive diameter range of 5mm to 300mm, catering to both small-scale precision components and large industrial structures. The hot rolling process enhances the alloy’s inherent properties, creating a product with consistent mechanical performance, excellent workability, and a surface finish optimized for subsequent machining or direct application. Whether for marine hardware, petrochemical equipment, or food processing machinery, these round bars deliver reliable performance in environments where strength and corrosion resistance are non-negotiable.
Key Properties of XM-19 Alloy Round Bar
The exceptional performance of XM-19 round bar stems from its precisely balanced chemical composition and the structural advantages imparted by hot rolling. Below is a detailed breakdown of its core properties:
Chemical Composition
The unique alloying elements in XM-19 are responsible for its superior strength and corrosion resistance. The following table outlines its chemical composition limits:
| Element | Content Range (%) | Role |
|---|---|---|
| Carbon (C) | ≤ 0.06 | Maintains weldability and reduces carbide precipitation |
| Chromium (Cr) | 20.5 - 23.5 | Provides primary corrosion resistance and oxidation protection |
| Nickel (Ni) | 11.5 - 13.5 | Stabilizes the austenitic structure for toughness |
| Manganese (Mn) | 4.0 - 6.0 | Enhances strength and austenite stability |
| Molybdenum (Mo) | 1.5 - 3.0 | Improves resistance to pitting and crevice corrosion |
| Nitrogen (N) | 0.2 - 0.4 | Significantly boosts yield strength without compromising ductility |
| Niobium (Cb) | 0.1 - 0.3 | Refines grain structure and enhances mechanical properties |
| Vanadium (V) | 0.1 - 0.3 | Increases strength and improves creep resistance |
| Phosphorus (P) | ≤ 0.045 | Controlled impurity to prevent brittleness |
| Sulfur (S) | ≤ 0.03 | Minimized to ensure corrosion resistance and toughness |
Mechanical Properties
XM-19 hot rolled round bar outperforms traditional austenitic stainless steels in both strength and versatility, maintaining performance across a wide temperature range:
| Property | Unit | Minimum Value (Hot Rolled/Annealed) | High-Strength (HS) Variant |
|---|---|---|---|
| Tensile Strength | MPa | 690 | 1158 |
| Yield Strength (Rp0.2) | MPa | 380 | 1034 |
| Elongation (A5) | % | 35 | 15 |
| Brinell Hardness (HB) | - | ≤ 241 | 335 |
| Charpy Impact Toughness (Sub-zero) | J | Excellent | Good |
A key advantage of XM-19 is its retention of mechanical properties at extreme temperatures—from cryogenic conditions to elevated heat—without significant degradation. Unlike most austenitic stainless steels, it remains non-magnetic even after cold working or exposure to sub-zero temperatures .
Physical & Corrosion Resistance Properties
The physical characteristics of XM-19 complement its mechanical strength, while its corrosion resistance sets a benchmark for commercial stainless steels:
| Property | Specification |
|---|---|
| Density | 7.8 g/cm³ (0.285 lb/in³) |
| Melting Point | 1415 - 1450°C |
| Elastic Modulus | 190 - 210 GPa (26.2 x 10⁶ psi) |
| Thermal Conductivity (at 100°C) | 42.7 W/m-K (9.0 Btu/ft·hr·°F) |
| Thermal Expansion Coefficient (68-212°F) | 9.0 x 10⁻⁶ /°F |
| Corrosion Resistance | Superior to 316, 316L, 317, 317L; excellent resistance to general corrosion, crevice corrosion, and sulfide stress cracking |
In annealed condition (1066°C), XM-19 exhibits enhanced crevice corrosion resistance compared to 316L. For welded applications or extreme corrosive environments, annealing at 1121°C further optimizes its protective properties . Notably, it meets NACE Standard MR 01-75/ISO 15156-3 requirements for sulfide stress cracking resistance, making it suitable for oilfield "down hole" equipment .
Hot Rolling Process & Quality Control
Our XM-19 round bars undergo a precision hot rolling process designed to maximize the alloy’s potential while ensuring dimensional accuracy:
- Raw Material Preparation: We source premium XM-19 billets produced via ESU remelting or AOD/VOD to minimize impurities and ensure chemical consistency .
- Controlled Heating: Billets are heated to 1177-1232°C at a controlled rate (50-100°C/hour below 600°C) to prevent thermal cracking, with of 20-30 minutes per 25mm thickness .
- Hot Rolling: Billets are rolled to diameter specifications (5-300mm) within a temperature range of 980-1200°C, ensuring optimal grain structure and mechanical properties .
- Annealing Treatment: Bars are annealed at 1066°C (standard) or 1121°C (corrosion-critical applications) followed by rapid cooling to preserve austenitic structure .
- Dimensional Inspection: Each bar undergoes rigorous measurement to ensure diameter tolerance of ±0.5mm (for <50mm) and ±1.0mm (for >50mm), with straightness deviation ≤1mm/m.
Quality control every stage, including chemical analysis via 光谱分析,mechanical testing (tensile, hardness), and non-destructive testing (ultrasonic inspection) to detect internal defects.
Applications Across Industries
The versatility of XM-19 hot rolled round bar makes it indispensable in industries requiring both strength and corrosion resistance:
- Oil & Gas: Used for downhole rigging, pump shafts, and valves, thanks to its sulfide stress cracking resistance and high strength .
- Marine Engineering: Ideal for boat shafts, marine hardware, and offshore fasteners—outperforming 316 in saltwater corrosion resistance while doubling yield strength .
- Chemical Processing: Valves, fittings, and heat exchanger components benefit from its resistance to aggressive chemicals and elevated temperatures .
- Food & Beverage: Sanitary pump parts and processing equipment leverage its corrosion resistance and non-magnetic properties, ensuring compliance with hygiene standards .
- Nuclear & Pulp/Paper: Utilized in nuclear fuel recycling and paper mill machinery, where durability and chemical resistance are critical .
- Medical: Suitable for non-magnetic implants due to its biocompatibility and low magnetic permeability .
Specification & Order Information
Our XM-19 hot rolled round bars adhere to global standards and can be customized to meet specific application needs:
| Specification | Details |
|---|---|
| Product Form | Hot rolled round bar |
| Diameter Range | 5mm - 300mm |
| Length | Standard: 3m, 6m; Custom lengths up to 12m available |
| Standards | ASTM A276, A479, UNS S20910, NACE MR 01-75 |
| Surface Finish | Hot rolled (black oxide) or pickled (matte) |
| Packaging | Anti-rust oil coating, waterproof paper wrapping, and steel bundling for sea transport |
We offer additional services including cutting (plasma, laser, or saw cutting), threading, and custom heat treatment to deliver ready-to-use components.
Why Choose XM-19 Over Conventional Stainless Steels?
XM-19 outperforms traditional grades like 316L and 304 in key metrics, offering tangible value:
| Feature | XM-19 | 316L | 304 |
|---|---|---|---|
| Yield Strength | 2x higher | Standard | Standard |
| Corrosion Resistance | Superior to 316L | Good | Moderate |
| Magnetic Properties | Non-magnetic after cold work | May become slightly magnetic | May become slightly magnetic |
| Temperature Performance | Excellent (cryogenic to high heat) | Limited at extremes | Limited at extremes |
| Cost-Efficiency | Higher strength-to-cost ratio | Lower initial cost, higher maintenance | Lower initial cost, shorter lifespan |
This performance advantage translates to reduced component weight, longer service life, and lower maintenance costs—making XM-19 a cost-effective solution for long-term applications .
Conclusion
XM-19 hot rolled stainless steel round bar (5-300mm diameter) stands as a high-performance solution for industries demanding uncompromising strength and corrosion resistance. Its unique alloy composition, precision manufacturing, and versatile applications make it a superior alternative to conventional stainless steels. Backed by rigorous quality control and compliance with international standards, our XM-19 round bars deliver consistent performance in the most challenging environments.
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