JOTAIN MATERIALS | SHAFT MATERIAL SELECTION WORKSHEET
Revision: 7 September 2026
Companion article: https://jotainmaterials.com/technical-resources/40cr-vs-ck45-shaft-material/

Complete this worksheet with the approved drawing and process requirements.
Blank fields are questions to resolve, not supplier acceptance or design approval.

1. PART AND REQUIRED MATERIAL
Part / order line:
Drawing number / revision / date:
Quantity:
Required grade / product standard / edition:
If the drawing says CK45, confirmed designation and standard:
Customer or project specification:
Document precedence / responsible engineer:

2. DUTY AND CRITICAL FEATURES
Steady / reversing torque and bending requirements:
Shock, temperature, corrosion or other service conditions:
Shoulders, fillets, keyways, splines, holes, threads and fits:
Specified fatigue or toughness requirements / reference:
Critical surface and geometry requirements / drawing zones:

3. DIMENSIONS AND PROCESS
Supplied diameter / limits / units:
Supplied length / limits / units:
Rough-machined dimensions:
Section during heat treatment:
Finished dimensions / drawing reference:
Machining allowance (identify radial or diametral):
End allowance / test material required:
Thermal delivery condition:
Surface process at delivery:
Later treatment, machining, grinding or coating / responsible party:
Straightness method / supports / assessed length / limit / stage:

4. REQUIRED PROPERTIES AND TESTS
Property / method / acceptance value / units:
Specimen source / radial and axial location / orientation:
Material condition represented / heat or treatment lot:
Impact method / specimen / temperature / acceptance, if required:
Hardness method / locations / acceptance, if required:
UT or MT method / coverage / stage / acceptance, if required:
Inspection-document standard / edition / type:
Required reports / submission date / reviewer:

5. SUPPLIER ALTERNATIVE (COMPLETE SEPARATELY FROM REQUIRED ROUTE)
Proposed grade / standard / edition:
Chemistry differences:
Product scope, condition and section-property differences:
Sampling, dimensions, surface and inspection differences:
Price and lead-time effect:
Drawing or customer approval needed:
Written decision / approver / reference / date:

6. OPEN ITEMS BEFORE ORDER
Item / affected requirement / responsible party / due date:
Supplier response / document reference:
Final approved route / revision / date:

Prepared by:
Reviewed by:
Drawing and supporting files attached: