DIN 1.6511 AISI 4340 steel flat bar | |
Comparative standard | Grade | C | Si | Mn | Cr | Mo | V | W | P | S | Ni |
GB | 40CrNiMoA | 0.36-0.44 | 0.10-0.350 | 0.45-0.70 | 1.10-1.40 | 0.20-0.35 | | | 0.03 | 0.02 | 1.30-1.7 |
AISI | 4337/4340 | | | | | | | | | | |
JIS | SNCM8 | | | | | | | | | | |
DIN | 34CrNiMo6/1.6582 | 0.34 | max 0.40 | 0.65 | 1.50 | 0.23 | | | 0.03 | 0.03 | 1.50 |
Dimensions |
Round bar |
Dia:16mm~700mm | Length:2m~6m |
Flat bar |
Thickness:20mm~500mm | Length:2m~12m |
*Dimensions can be customized |
Heat Treatment |
Normalizing | 850-880°C | - |
Stress Relieving | 650°C | air cooling |
Quenching | 830-860°C | oil quenching |
Tempering | 540-660°C | |
1.Normalizing |
Normalizing temperature : 850-880°C |
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2.Stress Relieving |
Stress relieving to remove machining stresses should be carried out
by heating to approx.650°C, |
holding for 1-2 hours at heat,followed by air cooling . |
This operation is performed to reduce distortion during heat
treatment . |
|
3.Hardening |
Harden from a temperature of 830-860°C followed by oil quenching. |
Quenching temperature in the end quench test is 850°C. |
|
4.Tempering |
tempering temperature: 540-660°C |
|
Detail information |
Process | EAF+LF+VD+Forging+(Rolling)+Annealing Condition (optional) |
Delivery Condition | Hot forged+Rough machined/turned surface |
MOQ | 1 ton |
Technical Data | According to customer’s requirements of chemical composition,
physical properties and mechanical testing |
Ultrasonic Test | Ultrasonic test according to SEP 1921-84 G3 D/d E/d |
Applications |
Hot extrusion dies, forging die forging hammer, forging press die,
precision forging die well as aluminum, copper and alloys
die-casting mold. |
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Relevant documents |
Contract Documents | Contract, Debit Note, PI(Performa Invoice) |
Shipping Documents | B/L(Bill of Loading), Packing List, Shipping list, CI(Commercial
Invoice) |
Certifications | SGS, ISO9001-2008, UT(Ultrasonic Test), CO(Certificate of
Original), MTC(Milling Test Certificate) |