40cr seamless steel yeeb nkab

Lus piav qhia luv luv:

Khoom specification:

Sab nraud txoj kab uas hla ntawm cov yeeb nkab steel 20-426

Hlau yeeb nkab phab ntsa thickness ntawm 20-426

Steel yeeb nkab txheem:

Raws li tus qauv GB / T 3077-2008: tshuaj muaj pes tsawg leeg (ntau seem, %) C 0.37 ~ 0.44, Si 0.17 ~ 0.37, Mn 0.50 ~ 0.80, Cr0.80 ~ 1.10, Ni≤0.30.【Mechanical zog】

Sample blank size (mm): 25

Kev kho cua sov:

Thawj quenching cua sov kub (℃): 850;Coolant: Roj

Qhov thib ob quenching cua sov kub (℃): -

Tempering cua kub (℃): 520;Coolant: dej, roj

Tensile zog (σb / MPa): ≧980

Yield point (σs / MPa): ≧785

Elongation tom qab tawg (δ5 /%): ≧9

Kev txo qis ntawm ntu ntu (ψ/%): ≧45

Kev cuam tshuam kev nqus dej (Aku2 / J): ≧47

Brinell hardness (HBS100/3000) (annealing lossis high-temperature tempering mob): ≦207