Injection Molding
Tooling and molding for your repeat plastic parts.
YOUR GRADE. YOUR CONDITION. YOUR FINISHED FIT.
8620 Alloy Steel for Your Custom Machined Parts
Plan your 8620 steel machining around the specified carburized case, core requirements and final fit. Agree the case-depth definition, protected surfaces and finishing allowance before releasing your gear, pinion, pin or bushing.
1 part model + 1 controlled drawing · Material condition · Quantity
Grade & specificationConfirm grade and product standard.
Stock conditionConfirm bar, billet and the actual supplied condition.
Final-fit reviewDefine datums, fits and thermal sequence.
Material recordsAgree receiving and inspection evidence.
Know Your 8620 Material Before You Order
8620 is a low-carbon nickel-chromium-molybdenum alloy steel used for reviewed case-hardening applications. Specify the incoming product and final case/core requirements separately.
Specify the requested grade with product form and condition.
Alro HR bar reference · not a batch analysis.
Product form, section and supplied stock condition.
Required case, core, protected areas and final fit.
Material identity, lot records and agreed inspection.
Custom 8620 Steel Parts for Your Assembly
Select your part family, then review the four decisions that control your order.
Connect Your Gear Geometry to the Final Case
For your 8620 alloy steel machining inquiry, identify the gear drawing, tooth specification, hub bore and locating faces. Gear cutting and inspection scope require review for your actual geometry.
Your fitDatums, mating faces and critical relationships.
Your processStock condition, sequence and tool access.
Your approvalFinal dimensions and agreed inspection scope.
Agree Blank Machining and Tooth Processing
For your 8620 steel milling review, separate hub, bore and bolt-circle work from tooth generation. Define the route and acceptance before assuming a finished gear process.
Your fitDatums, mating faces and critical relationships.
Your processStock condition, sequence and tool access.
Your approvalFinal dimensions and agreed inspection scope.
Specify the Case Without Losing the Core Requirement
For 8620 steel carburizing, define effective or total case depth, acceptance method, test location and required core condition. Do not use one unspecified depth for every gear section.
Your fitDatums, mating faces and critical relationships.
Your processStock condition, sequence and tool access.
Your approvalFinal dimensions and agreed inspection scope.
Protect the Case During Final Finishing
Identify post-treatment grinding or bore finishing and allowable material removal. Agree final gear, bore and surface checks without assuming the hardened case survives unlimited rework.
Your fitDatums, mating faces and critical relationships.
Your processStock condition, sequence and tool access.
Your approvalFinal dimensions and agreed inspection scope.
Keep Tooth and Journal Datums Connected
For your 8620 steel shafts, relate pinion teeth, bearing journals, shoulders and retaining features. Send the mating assembly requirements where they control acceptance.
Your fitDatums, mating faces and critical relationships.
Your processStock condition, sequence and tool access.
Your approvalFinal dimensions and agreed inspection scope.
Support the Shaft Through the Cutting Route
For your 8620 steel turning inquiry, identify support locations and critical runout. Separate rough cutting, tooth processing and final journal finishing.
Your fitDatums, mating faces and critical relationships.
Your processStock condition, sequence and tool access.
Your approvalFinal dimensions and agreed inspection scope.
Reserve Only the Finishing Stock Your Case Permits
Plan treatment distortion and finishing allowance before carburizing. Identify which journals or threads require masking and which surfaces require a case.
Your fitDatums, mating faces and critical relationships.
Your processStock condition, sequence and tool access.
Your approvalFinal dimensions and agreed inspection scope.
Verify the Finished Pinion Interfaces
Agree final journal diameter, runout, tooth acceptance and traceable thermal records. A first-machined sample is not acceptance of the final carburized part.
Your fitDatums, mating faces and critical relationships.
Your processStock condition, sequence and tool access.
Your approvalFinal dimensions and agreed inspection scope.
Define the Loaded Land and Retention Features
For your 8620 steel pins, specify bearing diameter, shoulder position, lubrication passages and retention. Mark the surfaces where case hardening is required.
Your fitDatums, mating faces and critical relationships.
Your processStock condition, sequence and tool access.
Your approvalFinal dimensions and agreed inspection scope.
Give Cross-Holes a Deburring Route
For 8620 steel drilling and 8620 steel tapping, identify exits, intersecting passages and thread runout. Keep burr removal away from protected bearing lands.
Your fitDatums, mating faces and critical relationships.
Your processStock condition, sequence and tool access.
Your approvalFinal dimensions and agreed inspection scope.
Separate Surface and Core Acceptance
For your 8620 steel heat treatment request, define surface and core requirements with their test methods and locations. Include the actual pin section and incoming condition.
Your fitDatums, mating faces and critical relationships.
Your processStock condition, sequence and tool access.
Your approvalFinal dimensions and agreed inspection scope.
Inspect the Pin After Its Final Finish
Agree diameter, straightness, retention and surface checks after all specified operations. Identify any limits on grinding through the required case.
Your fitDatums, mating faces and critical relationships.
Your processStock condition, sequence and tool access.
Your approvalFinal dimensions and agreed inspection scope.
Specify the Bore and the Mating Shaft
For your 8620 steel bushings, identify bore fit, outside locating diameter, flange face and lubrication grooves. State the final assembly condition.
Your fitDatums, mating faces and critical relationships.
Your processStock condition, sequence and tool access.
Your approvalFinal dimensions and agreed inspection scope.
Sequence Boring and Shoulder Machining
For your 8620 steel CNC machining review, show bore depth, internal shoulder access and wall transitions. Agree how the sleeve is supported during cutting.
Your fitDatums, mating faces and critical relationships.
Your processStock condition, sequence and tool access.
Your approvalFinal dimensions and agreed inspection scope.
Mark the Surfaces That Need a Case
Identify bore, outside diameter and faces to be carburized or protected. Connect the required case with wall thickness and final dimensional acceptance.
Your fitDatums, mating faces and critical relationships.
Your processStock condition, sequence and tool access.
Your approvalFinal dimensions and agreed inspection scope.
Measure the Bore in the Finished Condition
Agree bore gauging, roundness or fit requirements and final surface protection. Keep the material and thermal records with the inspected drawing revision.
Your fitDatums, mating faces and critical relationships.
Your processStock condition, sequence and tool access.
Your approvalFinal dimensions and agreed inspection scope.
8620 Steel Properties: Separate Case and Core
Your specified case and core are different acceptance requirements.
| Your callout | What to confirm |
|---|---|
| Incoming stock | Grade, product form, section and supplied condition |
| Carburized case | Depth definition, locations, acceptance method and protected areas |
| Finished component | Core requirement, final fit and permitted finishing removal |
Case depth needs a definition and a test location.
Do not confuse effective case depth with total case depth.
Finishing can remove part of the case.
Agree grinding allowance and final verification before treatment.
8620 Steel Composition & European Grade Names
Compare the selected product limits before reviewing an alternative.
Chromium & Nickel: Compare the Reference Ranges
Mass % · common axis 0–0.80%
8620 · Cr
0.4–0.6%
20NiCrMo2-2 +H · Cr
0.35–0.7%
8620 · Ni
0.4–0.7%
20NiCrMo2-2 +H · Ni
0.4–0.7%
00.40%0.80%
Producer reference limits · not LK lot analysis.
| Mass % | 8620 · Alro HR bar | 20NiCrMo2-2 +H · Ovako EN ISO 683-3 |
|---|---|---|
| C | 0.18–0.23 | 0.17–0.23 |
| Mn | 0.70–0.90 | 0.65–0.95 |
| Si | 0.15–0.35 | ≤0.40 |
| Ni | 0.40–0.70 | 0.40–0.70 |
| Cr | 0.40–0.60 | 0.35–0.70 |
| Mo | 0.15–0.25 | 0.15–0.25 |
| P max | 0.035 | 0.025 |
| S | ≤0.040 | 0.020–0.040 |
European comparison: review 20NiCrMo2-2 / 1.6523 as a candidate, not automatic equivalence. The selected +H reference and other producer variants have different limits. A missing lower silicon limit is not zero.
Alro: 8620 HR bar ↗ · Ovako: selected 20NiCrMo2-2 +H reference ↗ · Sullivan: designation and route review ↗
Resolve 6 Risks Before You Release the Drawing
Review 8620 steel machinability together with geometry, material condition and the final manufacturing route.
Confirm Your Product and Supplied Condition
Specify the actual stock form, section and material record. Treat 8620 steel machinability as a condition-and-geometry review rather than one fixed cutting rating.
01 · Requirement
Define the condition and acceptance method.
02 · Verification
State locations and final inspection scope.
03 · Final fit
Agree dimensions after the full sequence.
Review stockMachineProcess if specifiedInspect
State the Case and Core Requirements Separately
For 8620 steel case hardening, define depth type, hardness method, locations and core acceptance. Keep these requirements on the controlled drawing.
01 · Requirement
Define the condition and acceptance method.
02 · Verification
State locations and final inspection scope.
03 · Final fit
Agree dimensions after the full sequence.
Review stockMachineProcess if specifiedInspect
Plan Final Fit Before Carburizing
Agree allowance, support and final inspection after treatment. Any straightening or finishing must preserve the required condition and case.
01 · Requirement
Define the condition and acceptance method.
02 · Verification
State locations and final inspection scope.
03 · Final fit
Agree dimensions after the full sequence.
Review stockMachineProcess if specifiedInspect
Mark the Surfaces That Must Stay Protected
Show areas requiring carburizing protection, threads, bores and mating lands. Agree the actual masking and verification route for your geometry.
01 · Requirement
Define the condition and acceptance method.
02 · Verification
State locations and final inspection scope.
03 · Final fit
Agree dimensions after the full sequence.
Review stockMachineProcess if specifiedInspect
Limit Material Removal After the Case Is Formed
For 8620 steel grinding, specify final allowance and acceptance. Avoid assuming that regrinding can remove unlimited stock without changing the required case.
01 · Requirement
Define the condition and acceptance method.
02 · Verification
State locations and final inspection scope.
03 · Final fit
Agree dimensions after the full sequence.
Review stockMachineProcess if specifiedInspect
Connect Final Dimensions with the Thermal Records
Agree dimensional checks, case/core evidence and material identity. Define which records accompany the finished component.
01 · Requirement
Define the condition and acceptance method.
02 · Verification
State locations and final inspection scope.
03 · Final fit
Agree dimensions after the full sequence.
Review stockMachineProcess if specifiedInspect
From Your Material to a Finished Component
Illustrative components. Operations and availability are confirmed for your drawing.
3 Part States. One Acceptance Drawing.
01 · Incoming material
Grade, product form, section, condition and lot identity.
02 · After specified processing
Specified case/core route, distortion and agreed finishing allowance.
03 · Finished part
Final fits, surface protection and agreed acceptance evidence.
Agree the Evidence Your Receiving Team Needs
Confirm Your Stock Before the First Setup
Review grade, product standard, form, condition and lot identity. Agree any required material declarations at inquiry.
- Material identity and traceability.
- Critical dimensions and assembly fit.
- Process and finish records, where specified.
Sampling, methods and document scope are agreed with your quotation.
Quality Assurance →
Approve the Finished Condition, Not Just the First Cut
Connect critical journal and bore fits to the ordered stock condition, planned treatment and final finishing sequence.
- Material identity and traceability.
- Critical dimensions and assembly fit.
- Process and finish records, where specified.
Sampling, methods and document scope are agreed with your quotation.
Quality Assurance →
Verify the Features That Control Assembly
Identify bores, thread fits, datum relationships and final inspection scope. Keep the approved drawing revision with the records.
- Material identity and traceability.
- Critical dimensions and assembly fit.
- Process and finish records, where specified.
Sampling, methods and document scope are agreed with your quotation.
Quality Assurance →
Agree Protection and Receiving Evidence
Confirm handling protection, packaging, part identification and the documents needed by your receiving team.
- Material identity and traceability.
- Critical dimensions and assembly fit.
- Process and finish records, where specified.
Sampling, methods and document scope are agreed with your quotation.
Quality Assurance →
6 Inputs for Your 8620 Steel Machining Quote
01CAD and controlled drawing
02Grade, product form, section and supplied state
03First-order and repeat quantities
04Critical dimensions and surface finish
05Case/core requirements, masking and finishing allowance
06Inspection records and delivery needs
China Manufacturing. Dallas-Area Coordination.
Coordinate your drawing review, material condition, sample decisions and receiving requirements.
Answers Before You Specify
Can 8620 steel be case hardened?
8620 can be reviewed for a specified carburizing and case-hardening route. Define case depth, surface and core requirements, test locations and final acceptance.
8620 vs 4140 steel: what is different?
Compare the required case/core route and final properties. Do not treat a carburizing-grade application and a different alloy/condition as automatic substitutes.
8620 vs 9310 steel: how should I compare?
Review chemistry, section, case/core requirements, material standard and final verification. A generic grade ranking does not approve substitution.
Does 8620 steel rust?
It is alloy steel, not stainless steel. Agree exposure, protection, storage and shipping requirements for your finished component.
Can I grind 8620 after carburizing?
Only within an agreed finishing route. Specify removal allowance and final case verification so finishing does not defeat the required case.
How much does 8620 steel machining cost?
Send the drawing, stock condition, quantity, case/core requirements, masking, finishing and inspection scope for your quote.
Is 20NiCrMo2-2 the same as 8620?
It is a comparison candidate. Confirm the complete product standard, selected variant, section, supplied state and required evidence before substitution.
Compare Carbon & Alloy Steel →
References support material selection. Your order specification and material records govern.
