Steel, Explained.
A practical reference — grades, standards, heat treatment, testing and equivalents.
54 Articles — 5 Categories — Reviewed Weekly
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Equivalence & Standards
How steel grades map across EN, DIN, ASTM, AISI, GOST, JIS and UNE — how designations are built, and why an equivalent grade is never simply an identical one.
Reading a Datasheet
What the numbers on a steel datasheet actually mean: chemical analysis, tensile and yield strength, hardness, and the delivery condition that changes all of them.
Calculated Values
The values engineers work out rather than look up — PREN for pitting resistance, carbon equivalent for weldability, and the formulas behind them.
Heat Treatment
Hardening, tempering, annealing, case-hardening and nitriding — what each process changes in the steel, and how it shows up in the grade designation.
Full Index
Equivalence & StandardsHow steel grades map across EN, DIN, ASTM, AISI, GOST, JIS and UNE — how designations are built, and why an equivalent grade is never simply an identical one.4 articlesReading a DatasheetWhat the numbers on a steel datasheet actually mean: chemical analysis, tensile and yield strength, hardness, and the delivery condition that changes all of them.12 articlesCalculated ValuesThe values engineers work out rather than look up — PREN for pitting resistance, carbon equivalent for weldability, and the formulas behind them.9 articlesSteel FamiliesThe major groups of steel and what each is for: tool steels, high-strength structural grades, spring steels, and grades built for high or low service temperature.16 articlesHeat TreatmentHardening, tempering, annealing, case-hardening and nitriding — what each process changes in the steel, and how it shows up in the grade designation.13 articles