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XM-19 Alloy Round Bar Diameter 5 - 300mm Stainless Steel Bar Hot Rolled SS Bar

China XM-19 Alloy Round Bar Diameter 5 - 300mm Stainless Steel Bar Hot Rolled SS Bar

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XM-19 Alloy Round Bar Diameter 5 - 300mm Stainless Steel Bar Hot Rolled SS Bar

MOQ： 10 kg
Price： 15 - 20 USD/Kg
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Payment Terms	L/C, T/T, Western Union
Supply Ability	3 Ton per week
Delivery Time	5 - 12 days based on the quantity
Packaging Details	standard packing for export
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
Brand Name	DELTA
Model Number	XM-19
Certification	ISO
Place of Origin	China

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Product Specification


Payment Terms	L/C, T/T, Western Union	Supply Ability	3 Ton per week
Delivery Time	5 - 12 days based on the quantity	Packaging Details	standard packing for export
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
Brand Name	DELTA	Model Number	XM-19
Certification	ISO	Place of Origin	China
High Light	XM-19 alloy round bar ，hot rolled stainless steel bar ，nickel alloy SS bar

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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Our company is located in Wuxi City, China, we are a stainless steel plate, seamless steel pipe, round steel, steel belt, decorative pipe and other products distribution wholesale private enterprise. Our company operates stainless steel plate, seamless steel pipe, round steel, steel belt, decorative... Our company is located in Wuxi City, China, we are a stainless steel plate, seamless steel pipe, round steel, steel belt, decorative pipe and other products distribution wholesale private enterprise. Our company operates stainless steel plate, seamless steel pipe, round steel, steel belt, decorative...

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JIANGSU MITTEL STEEL INDUSTRIAL LIMITED
No.283-1, Youyi Middle Road, Xishan District, Wuxi City, Jiangsu Province
https://www.stainless-strips.com/

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