EngiRef / Guides

Engineering Guides

Free, in-depth guides written around the same formula, materials, and reference data you can browse in EngiRef. Every guide is free, no account required.

Choosing Engineering Materials 101: How to Read Properties and Pick the Right One

A beginner's guide to selecting engineering materials: what strength, stiffness, ductility, and hardness actually mean, and how to match properties to a job.

8 min read

Understanding Safety Factors: What They Cover and How to Choose One

A practical guide to factors of safety in engineering: what a safety factor really accounts for, how design and yield factors differ, and how to pick a value.

8 min read

How to Select the Right Bolt Grade

A practical guide to bolt grade selection: what metric property classes and SAE grades mean, how proof load and tensile strength differ, and how to avoid mismatches.

8 min read

SI vs Imperial: The Unit Mistakes That Wreck Calculations

A guide to the unit-system pitfalls that cause engineering errors: pounds mass versus pounds force, the gc factor, mixed prefixes, and how to check units.

8 min read