Material requirements
01
Identify 42CrMo4, the applicable material standard and delivery condition. State any mechanical property, hardness or heat treatment requirements on the drawing. Values and documentation must be confirmed for the order.
42CrMo4 CHROME ROD
42CrMo4 chrome rod requirements reviewed against your drawing and specified material condition.
PRODUCT OVERVIEWPRODUCT DETAILSMYLER
PRODUCT OVERVIEWPRODUCT DETAILSMYLER2026
OUR APPROACH
Specify 42CrMo4 and whether a quenched-and-tempered (+QT) condition is required. The material name alone does not define core strength.
The result is a defined supply scope that connects material, dimensions and surface requirements with the inspection records needed for acceptance.
OUR APPROACH
Specify 42CrMo4 and whether a quenched-and-tempered (+QT) condition is required. The material name alone does not define core strength.
The result is a defined supply scope that connects material, dimensions and surface requirements with the inspection records needed for acceptance.
TECHNICAL REFERENCE
Product specifications.
| Parameter | Reference value | Application / confirmation |
|---|---|---|
| Material & condition | 42CrMo4 / 42CrMo4+QT | +QT is a distinct delivery condition. Source also groups 42CrMo(S)4; confirm the exact ordered designation. |
| Diameter | 10–160 mm | Confirm the order requirement with your quotation. |
| Diameter tolerance | f7 | Confirm the order requirement with your quotation. |
| Chrome thickness | 150: ≥12 · 250: ≥20 · 500: ≥30 | Raw source minima: units are omitted in the coating-thickness column. Confirm the unit before using these values in an order. |
| Chrome-layer hardness | ≥1000 HV0.1 | Chrome coating only. This value does not describe the core or induction hardened layer. |
| Surface roughness | Ra ≤0.10 · Rt ≤1.00 | Raw source Ra/Rt values; the chrome tables omit their unit. Confirm the unit, test method and sampling length. |
| Ovality | ≤ ½ of the diameter tolerance | Confirm the selected diameter tolerance and measurement method. |
| Straightness | ≤0.2 mm/m | Agree measurement length and support conditions. |
| Microcrack density | ≥6000 microcracks/mm² | Catalogue coating characteristic; not a MYLER inspection result. |
| NSS corrosion reference | 150: R10 150 h / R9 300 h; 250: R10 250 h / R9 500 h; 500: R10 500 h / R9 1000 h | Source finish classes only. Test: ISO 9227; evaluation: ISO 10289. Request order-specific test evidence. |
| Length | Confirm for the order | No universal length is stated in the referenced product table. |
| Chemistry — C / Si / Mn | C 0.38–0.45%; Si ≤0.40%; Mn 0.60–0.90% | Use the chrome-bar table. The web linear-shaft 42CrMo(S)4 row conflicts and is excluded. |
| Chemistry — Cr / Mo | Cr 0.90–1.20%; Mo 0.15–0.30% | Confirm the order requirement with your quotation. |
| Chemistry — P / S | P ≤0.035%; S ≤0.035% | Confirm whether the ordered grade is 42CrMo4 or a sulfur-controlled variant; grouped source names are not interchangeable. |
| Core hardness | Confirm with heat treatment | No universal core-hardness value is stated in the source. |
| +QT mechanical reference — Ø≤16 mm | Rp0.2 ≥900 MPa · Rm 1000–1200 MPa · A ≥9% | Confirm the order requirement with your quotation. |
| +QT mechanical reference — Ø16–40 mm | Rp0.2 ≥750 MPa · Rm 1000–1200 MPa · A ≥11% | Confirm the order requirement with your quotation. |
| +QT mechanical reference — Ø40–100 mm | Rp0.2 ≥650 MPa · Rm 900–1100 MPa · A ≥12% | Confirm the order requirement with your quotation. |
| +QT mechanical reference — Ø100–160 mm | Rp0.2 ≥550 MPa · Rm 800–950 MPa · A ≥13% | Source size-band endpoints overlap. Agree which band applies at each boundary. |
| Other reference-family grades | C35 · 20MnV(S)6 · 38MnV(S)6 · X20Cr13 · 310 · 316 | Additional source grades, not equivalents to this product. Ask for separate MYLER availability and grade-specific chemistry/mechanical properties. |
WHAT TO SPECIFY
Specify the required 42CrMo4 condition, finished dimensions and chrome surface. Each requirement needs to be checked against the drawing and the intended application.
Dimensions & surface
02
Provide diameter, length, geometric tolerances and the required chrome finish. Include surface roughness and end details so fit, working surface and machining can be reviewed as one specification.
Inspection & records
03
List the inspection records, traceability and acceptance criteria required by your order. Material, dimensional and surface checks should be agreed with their methods and scope before supply.
WHAT TO SPECIFY
Specify the required 42CrMo4 condition, finished dimensions and chrome surface. Each requirement needs to be checked against the drawing and the intended application.
Material requirements
01
Identify 42CrMo4, the applicable material standard and delivery condition. State any mechanical property, hardness or heat treatment requirements on the drawing. Values and documentation must be confirmed for the order.
Dimensions & surface
02
Provide diameter, length, geometric tolerances and the required chrome finish. Include surface roughness and end details so fit, working surface and machining can be reviewed as one specification.
Inspection & records
03
List the inspection records, traceability and acceptance criteria required by your order. Material, dimensional and surface checks should be agreed with their methods and scope before supply.
OUR PROCESS
From drawing to confirmed requirements
Each enquiry begins with the complete requirement. Review material condition, geometry, working surface and acceptance records before the order is confirmed.
StepDrawing review001
Define the requirement
Review the drawing revision, quantity and intended application. Identify the material condition, geometric features and working surface requirements that must be confirmed before ordering.
StepMaterial condition002
State the required condition
Confirm the 42CrMo4 designation, applicable standard and specified delivery condition. Any mechanical property or hardness requirement needs a clear acceptance limit and agreed inspection scope. Proposed alternatives must be reviewed against the complete requirement before acceptance.
StepSurface review003
Check the chrome specification
Review chrome layer, surface roughness and any related inspection requirements. Confirm the scope against the drawing, including surfaces or features that require a different finish.
StepOrder agreement004
Agree the complete scope
Put the material, dimensions, finish, machining and documentation requirements into the order agreement. Confirm quantity, packing and delivery timing with any remaining technical questions resolved.
StepRelease review005
Keep the records aligned
Review the inspection records and identification against the order. Chrome rods are normally wrapped in paper, then packed in wooden cases to help protect against scratches and knocks during transport. Resolve any changes before dispatch.
OUR PROCESS
From drawing to confirmed requirements
Each enquiry begins with the complete requirement. Review material condition, geometry, working surface and acceptance records before the order is confirmed.
StepDrawing review
001Define the requirement
Review the drawing revision, quantity and intended application. Identify the material condition, geometric features and working surface requirements that must be confirmed before ordering.
StepMaterial condition
002State the required condition
Confirm the 42CrMo4 designation, applicable standard and specified delivery condition. Any mechanical property or hardness requirement needs a clear acceptance limit and agreed inspection scope. Proposed alternatives must be reviewed against the complete requirement before acceptance.
StepSurface review
003Check the chrome specification
Review chrome layer, surface roughness and any related inspection requirements. Confirm the scope against the drawing, including surfaces or features that require a different finish.
StepOrder agreement
004Agree the complete scope
Put the material, dimensions, finish, machining and documentation requirements into the order agreement. Confirm quantity, packing and delivery timing with any remaining technical questions resolved.
StepRelease review
005Keep the records aligned
Review the inspection records and identification against the order. Chrome rods are normally wrapped in paper, then packed in wooden cases to help protect against scratches and knocks during transport. Resolve any changes before dispatch.
FREQUENTLY ASKED QUESTIONS
What to confirm before placing your order
The chrome-bar reference groups several grades for surface properties. Chemistry, core properties and delivery condition remain grade-specific; 304, C45 and 42CrMo4 are not interchangeable.
Send your drawing and required parameters for review. Material, dimensions, surface requirements and acceptance criteria are confirmed in the quotation.
Send the exact product, material, delivery condition, dimensions, quantity and drawing. Specify tolerances, roughness, straightness, hardness, inspection records and any special packing requirements.
Need to confirm another requirement?
View all FAQ’sFREQUENTLY ASKED QUESTIONS
What to confirm before placing your order
Need to confirm another requirement?
Check out complete FAQ’sThe chrome-bar reference groups several grades for surface properties. Chemistry, core properties and delivery condition remain grade-specific; 304, C45 and 42CrMo4 are not interchangeable.
Send your drawing and required parameters for review. Material, dimensions, surface requirements and acceptance criteria are confirmed in the quotation.
Send the exact product, material, delivery condition, dimensions, quantity and drawing. Specify tolerances, roughness, straightness, hardness, inspection records and any special packing requirements.
Every drawing is different
Every detail matters.
42CrMo4 chrome rod requirements begin with your material condition, drawing and acceptance criteria.
Start with your drawing so the required condition and inspection scope can be confirmed.
