AISI P20 + ni / 1.2738, DIN 40CrMnNiMo8-6-4

esignation by Standards

화학 성분 (중량 %)

설명
This steel is in the category generally labeled as Mold Steels. Nickel and chromium are the alloying elements for hardness and toughness. Cold work tool steel with good machinability, excellent polishability, suitable for texturing. Improved through hardenability comapred to Mat.No. 1.2311.

도금 두께 측정기
Typically used for relatively low temperature applications such as die casting dies and injection molds, synthetic plastic moulds dies, for large moulds.

주변 온도에서의 물리적 특성 (평균값)
탄성 계수 [10³ x N / mm²] : 205
밀도 [g / cm³] : 7.80
열전도율 [W / mK] : 29.0
비열 용량 [J / gK] : 0.46

선형 열팽창 계수 10^-6oC^-1

Continuous Cooling Transformation (CCT) Diagram

소프트 어닐링
710-740로 가열^oC, 천천히 식히십시오. 그러면 235의 최대 Brinell 경도가 생성됩니다.

스트레스 해소
Stress relieving to remove machining stresses should be carried out by heating to 650^oC, holding for one hour at heat, followed by air cooling. This operation is performed to reduce distortion during heat treatment.

경화
840-880의 온도에서 강화^oC followed by oil, air ot warm bath (180-220^oC) quenching. Hardness after quenching is 52 HRC.

템퍼링
Tempering temperature: See the data bellow.

Tempering Temperature (^oC) vs. Hardness (HRC) vs. Tensile Stregth (N/mm²)

Tempering Diagram

단조
열간 성형 온도 : 1093-898^oC.

가공성
Machinability is relatively good at about 80% that of the W group water hardening steels.

용접
This alloy is weldable by conventional methods. Contact the alloy supplier for details and weld procedures.

면책 조항
The information and data presented herein are typical or average values and are not a guarantee of maximum or minimum values. Applications specifically suggested for material described herein are made solely for the purpose of illustration to enable the reader to make his own evaluation and are not intended as warranties, either express or implied, of fitness for these or other puposes. There is no representation that the recipient of this literature will receive updated editions as the become available