Common 4130 Alloy Steel Specifications & Heat Treatment
| Grade | 4130 Alloy Steel |
|---|---|
| Common bar standards | ASTM A29 and ASTM A322 for 4130 alloy steel bars; AMS 6345 only when certified and ordered. |
| Heat-treatment condition | Annealed, normalized, or quenched and tempered as specified by engineering. |
| Rod dimensions | Finished OD and upper/lower limits; length, quantity, straightness, surface roughness and certs as required. |
ASTM or AMS compliance must be explicitly stated on the PO.
These are common references, not automatic certification/availability or an in-house heat-treatment claim. The order’s material specification, condition, outside processing if any, and acceptance requirements govern.
CARBON & ALLOY STEEL / PRECISION ROD BUYING GUIDE
Chromium-molybdenum alloy often considered for engineered mechanical structures and components.
4130 Alloy Steel Rod Purchasing Specifications
SAE/AISI 4130; confirm ASTM A29/A322 or applicable project standard. A purchasing description must also identify whether the order is for raw stock, finished ground bar, or grinding of customer-owned stock. Finished outside diameter is separate from the material grade and is verified by an agreed inspection method.
Condition, Machining and Finishing
Call out annealed, normalized or heat-treated condition.
Grinding allowance and wheel selection depend on incoming bar diameter, condition, length and straightness. If the bar will undergo subsequent heat treatment or plating, coordinate processing sequence and the final diameter acceptance with your engineer.
Typical 4130 Alloy Steel Applications
Precision mechanical rods, qualified aircraft-related hardware and machined components.
End-use suitability depends on the component design, not merely a material name or a polished surface. Drawings should identify functional dimensional limits and related mechanical-property requirements.
Material Selection and Substitution Cautions
Fatigue, welding, strength and airworthiness are governed by design requirements, not a ground surface.
Precision Rod RFQ Checklist
4130 Alloy Steel Centerless Ground & TG&P Bar Options
4130 Alloy Steel Centerless Ground Bar
For 4130 Alloy Steel centerless ground rod or bar, 4130 chromium-molybdenum grade should be quoted with heat-treatment and strength requirements separate from ground OD limits. Review precision centerless grinding when specifying your finished outside diameter.
4130 Alloy Steel TG&P / Turned, Ground & Polished
When a drawing calls for 4130 Alloy Steel TG&P (TGP) or turned, ground and polished rod, for 4130 TG&P, define the intended shaft fit and supply condition; full process availability is by quote. Explore bar supply and surface finishing.
Centerless-ground bar and TG&P shafting are not synonymous. Verify material condition, full route, OD tolerance, straightness, surface finish and available lengths against the RFQ. Request pricing →
- Material: grade, applicable ASTM/AMS or mill specification, supply condition and certifications.
- Size: finished outside diameter, explicit upper/lower tolerance limits and incoming OD if grinding supplied stock.
- Length and volume: full-bar or cut lengths, cut tolerance, pieces/bars/pounds and shipping destination.
- Acceptance: straightness span/method, roughness, roundness, hardness and lot traceability if required.
Quote Finished Rod Stock or Your Existing Bars
Precision Ground Rods coordinates sourcing and finishing inquiries on a quotation basis. Material supply and processing through centerless OD grinding, straightening, polishing, cutting and packaging are reviewed against your order. We do not guarantee every grade is stocked or that every tolerance is achievable for all diameters and lengths.
Request 4130 Alloy Steel Rod Pricing → · Browse all materials
General purchasing guide only. The written quotation and mill documentation govern grade, condition and acceptance; this page is not a material certificate.
