International Material Cross-Reference & Equivalency
Cross-reference designations across national and international standards (ASTM/UNS, EN/DIN Werkstoff, JIS, ISO, GB). Comparable does not mean equivalent. Engineering substitutions must account for differing impurity limits, testing protocols, and mechanical tolerances.
International standard designations are established by distinct standards bodies with differing testing standards (e.g. ASTM E8 vs ISO 6892-1). Even when chemical compositions overlap, allowable trace impurities (such as phosphorus, sulfur, or iron), grain size requirements, temper nomenclature, and minimum elongation criteria can differ.
Never authorize a structural alloy substitution without verifying the governing procurement specification, temper, ruling section size, and environmental compatibility.
Relationship Classification Governance
Identical chemical composition and mechanical requirements across different naming authorities.
Rule: Direct 1:1 dual specification permissible subject to certified mill test reports (MTR).Officially recognized counterpart in another national or international engineering standard (e.g. ASTM to EN).
Rule: Chemical limits or testing protocols may have subtle differences (e.g. tighter P/S ceilings or impact requirements). Engineering review required before substitution.Substantially identical chemistry and overlapping mechanical envelope, but slight variations in allowable trace elements or testing protocols exist across governing standards.
Rule: Direct commercial substitution is generally permissible subject to certified Mill Test Report (MTR) confirmation for critical applications.Similar base alloy chemistry and general functional properties, but noticeable divergence in allowable impurity ceilings, cold-work response, or minimum yield requirements.
Rule: Engineering substitution review required. Design calculations must verify temper, formability, and corrosion limits before specifying as a direct replacement.Similar base chemistry and functional performance envelope, but not officially harmonized by standards organizations.
Rule: Comparable does not mean equivalent. Heat treatment response and dimensional tolerances may diverge.Close metallurgical alternative when the primary grade is unavailable or obsolete.
Rule: Design parameters (weldability, hardenability, fatigue limit) must be re-evaluated for the specific application.Frequently evaluated side-by-side during trade-off studies or alloy selection.
Rule: Materials serve different design priorities (e.g. higher strength vs superior corrosion resistance or cost).Materials superficially mistaken for equivalents that exhibit critical metallurgical incompatibilities.
Rule: DO NOT SUBSTITUTE without full engineering re-qualification.| Source Alloy (UNS) | Relationship Type | Target Grade / Standard | Engineering Scope & Nuance | Actions |
|---|---|---|---|---|
| C10100 Oxygen-Free Electronic (OFE) CopperPure Copper | Close Equivalent | C10200 Oxygen-Free (OF) CopperConfidence: HIGH | C10100 (OFE) is 99.99% pure with oxygen strictly <5 ppm, whereas C10200 (OF) is 99.95% pure with oxygen <10 ppm. Both exhibit identical 101% IACS conductivity; C10100 is specified when ultra-high vacuum or glass-to-metal sealing is critical. | |
| C10100 Oxygen-Free Electronic (OFE) CopperPure Copper | Nearest Alternative | C11000 ETP CopperConfidence: HIGH | C10100 is vacuum-melted oxygen-free copper, eliminating the cuprous oxide (Cu2O) inclusions found in C11000 ETP Copper. This provides immunity to hydrogen embrittlement during brazing/welding above 370°C. | |
| C10200 Oxygen-Free (OF) CopperPure Copper | Close Equivalent | C10100 Oxygen-Free Electronic (OFE) CopperConfidence: HIGH | C10200 offers 100% IACS conductivity and hydrogen embrittlement resistance at lower commercial cost than 99.99% C10100 OFE. | |
| C10200 Oxygen-Free (OF) CopperPure Copper | Close Equivalent | C10300 Oxygen-Free Extra Low Phosphorus (OFXLP) CopperConfidence: HIGH | Both alloys are oxygen-free coppers (>99.95% Cu); C10300 has 10-50 ppm phosphorus added for deoxidation while retaining 99% IACS conductivity. | |
| C10200 Oxygen-Free (OF) CopperPure Copper | Nearest Alternative | C11000 ETP CopperConfidence: HIGH | C10200 provides 100% IACS conductivity without the dissolved cuprous oxide present in C11000, eliminating hydrogen embrittlement risk during torch brazing. | |
| C10300 Oxygen-Free Extra Low Phosphorus (OFXLP) CopperDeoxidized Copper | Nearest Alternative | C10200 Oxygen-Free (OF) CopperConfidence: HIGH | C10300 (OFXLP) contains 0.001-0.005% P deoxidizer, retaining 99% IACS conductivity with complete immunity to hydrogen embrittlement. C10200 is unalloyed oxygen-free copper (100% IACS) without phosphorus. | |
| C10300 Oxygen-Free Extra Low Phosphorus (OFXLP) CopperDeoxidized Copper | Nearest Alternative | C12000 DLP CopperConfidence: HIGH | C10300 has extra low phosphorus (0.001-0.005%) for 99% IACS conductivity, whereas C12000 has 0.004-0.012% P for 98% IACS conductivity. | |
| C10300 Oxygen-Free Extra Low Phosphorus (OFXLP) CopperDeoxidized Copper | Nearest Alternative | C11000 ETP CopperConfidence: HIGH | C10300 is deoxidized with phosphorus, enabling reliable brazing in reducing atmospheres without hydrogen embrittlement, at 99% IACS conductivity vs 101% for C11000. |