Q255 B - Products,Stainless steel,special steel - 30crnimo8 Round Bar, Sheet,Plate,Tube
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MATERIAL DESIGNATION: Q255 B

Standard:
Country: China
Application:
Recommend a supplier
Company name: Haihong International Trade (HK) CO., Limited;
Production range:
  • Q255 B round bar, Dimension: 0.1mm to 4000mm
  • Q255 B square bar, Dimension: 8mm to 4000mm
  • Q255 B plate,sheet,flat,coil,strip, Dimension: 0.08mm to 2000mm(THK)*2mm to 4000mm(width)*Lenght(According to the demand for custom)
  • Q255 B forged, stepped shafts with flanks / discs /tubes /slugs /donuts /cubes /other different shapes based on OEM.
  • Delivery: hot forging or hot rolling and annealing or normalizing + tempering/quenching + tempering any other conditions based on the customer's requirement
Telephone: +86-816-3653300
Fax: +86-816-3639422
E-mail: E-mail:sales@x65cr13.com
Contact: Mr. Chen

Chemical Composition (%)

C(％) Si(％) Mn(％) P(％) S(％) Cr(％) Ni(％) Cu(%)
0.18～0.28 ≤0.30 0.40～0.70 0.045 0.045 ≤0.30 ≤0.30 ≤0.30

Mechanical Properties

  Min. Max. Approx
 Castings; Homogenization, Solution and Precipitation Heat Treated (H1100); separately cast test pieces
 Yield stress Rp0,2 (MPa) 827 - -
 Tensile stress, Rm (MPa) 896 - -
 Elongation, A (%) 10.0 - -
 Elongation in 4 x Diameter %
 Impact, Kv/Ku (J) - - -
 Hardness
HR min HR max
30 38
 HRC
 Castings; Homogenization, Solution and Precipitation Heat Treated (H1100); Integrally cast specimens
 Yield stress Rp0,2 (MPa) 827 - -
 Tensile stress, Rm (MPa) 896 - -
 Elongation, A (%) 6.0 - -
 Elongation in 4 x Diameter %
 Impact, Kv/Ku (J) - - -
 Hardness
HR min HR max
30 38
 HRC

Mechanical properties


The yield point σ s/MPa (no less) than in steel different thickness or diameter/mm | than 16:255
The yield point σ s/MPa (no less) than in steel different thickness or diameter/mm | > 16 ~ 40:245
The yield point σ s/MPa (no less) than in steel different thickness or diameter/mm | > 40 to 60:235
The yield point σ s/MPa (no less) than in steel different thickness or diameter/mm | > 60 ~ 100:225
The yield point σ s/MPa (no less) than in steel different thickness or diameter/mm | > 100 ~ 150:215
The yield point σ s/MPa (no less) than in steel different thickness or diameter/mm | > 150:205

Tensile strength σ b/MPa: 410 ~ 550
Elongation δ 5 / (%) (no less) than in steel different thickness or diameter/mm | than 16:24
Elongation δ 5 / (%) (no less) than in steel different thickness or diameter/mm | > 16 ~ 40:23
Elongation δ 5 / (%) (no less) than in steel different thickness or diameter/mm | > 40 to 60:22
Elongation δ 5 / (%) (no less) than in steel different thickness or diameter/mm | > 60 ~ 100:21
Elongation δ 5 / (%) (no less) than in steel different thickness or diameter/mm | > 100 ~ 150:20
Elongation δ 5 / (%) (no less) than in steel different thickness or diameter/mm | > 150:19
Impact test (1) | temperature / ℃ : 20
Impact test (1) | impact absorption power AKV/J: 27 frequency

The cold bending property

Sample direction: horizontal
180 ° of cold bending test b = 2 a different thickness or in steel diameter/mm | than 60: d = 1.5 a
180 ° of cold bending test b = 2 a different thickness or in steel diameter/mm | > 60 ~ 100: d = 2.5 a
180 ° of cold bending test b = 2 a different thickness or in steel diameter/mm | > 100 ~ 200: d = 3 a