Boron Element: Purity ≥99.5% B, Density 2.34 g/cm³

Q: Why is boron added to steel via ferroboron master alloys?

Boron is added to improve hardenability, allowing steel to achieve higher strength and wear resistance with lower alloying costs, as it is effective in trace amounts compared to other elements like chromium or molybdenum.

Q: What are the risks of excessive boron in steel?

Excessive boron (>0.005%) can cause brittleness, reduced toughness, and hot cracking due to boride precipitation at grain boundaries, compromising mechanical integrity.

Component Specifications

Definition

Boron (atomic number 5, symbol B) is a chemical element that, when added in trace amounts (typically 0.0005-0.005%) to steel via ferroboron master alloys, significantly improves hardenability, mechanical strength, and wear resistance by forming fine borides and influencing grain boundary behavior during heat treatment.

Working Principle

Boron atoms segregate to austenite grain boundaries during steel solidification, reducing the interfacial energy and suppressing ferrite nucleation, thereby increasing hardenability. In high-purity ferroboron master alloys, boron is introduced in a controlled, homogeneous form to ensure precise dispersion in molten steel, optimizing its effectiveness as a hardenability agent without causing brittleness.

Materials

High-purity elemental boron (≥99.5% B), typically sourced from boric acid or borax, processed into ferroboron alloy (FeB) with low impurities (Al, Si, C < 0.5%).

Technical Parameters

Parameter	Typical range	Notes & selection driver
Purity	≥99.5% B
Density	2.34 g/cm³
Addition Rate	0.001-0.005% in final steel
Boron Content	10-20% in master alloy
Melting Point	2076°C (elemental boron)

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 5445, DIN 17567

Parent Products

This component is used in the following industrial products

High-Purity Ferroboron Master Alloy

High-purity ferroboron master alloy is a critical additive material used in metallurgical processes to introduce controlled amounts of boron into steel and other ferrous alloys.

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Engineering Analysis

Risks & Mitigation

Brittleness from over-addition
Inhomogeneous dispersion causing property variations
Impurity contamination (e.g., aluminum) affecting alloy performance

FMEA Triads

Trigger: Inaccurate boron dosing during master alloy production
Failure: Inconsistent hardenability in final steel, leading to soft spots or cracking
Mitigation: Implement automated weighing systems and real-time spectrometry for boron content verification

Trigger: High impurity levels in boron source material
Failure: Reduced effectiveness, increased slag formation, and poor steel quality
Mitigation: Use high-purity boron (≥99.5%) and conduct material certification per ISO 5445

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

FeB alloys from ELKEM, Anyang Xinlong, KB Alloys

Compliance & Inspection

Tolerance

Boron content tolerance ±0.5% in master alloy, final steel boron ±0.0002%

Test Method

Optical emission spectrometry (OES) per ASTM E415, combustion analysis for trace boron

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

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Inspection readiness

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Supplier transparency

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Manufacturers of Boron Element

Manufacturer profiles associated with Boron Element.

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Frequently Asked Questions

Why is boron added to steel via ferroboron master alloys?