4118/18crmo4/ 20CrMo/ DIN1.7218 Forged steel  

Packaging & Delivery

Packaging Detail: Seaworthy Package

Delivery Detail: Within 10 - 45 days after confirmed

Specification shot forged steel round astm 4118/18crmo4/20crmo with good quality

1.Hot Forged: Dia 80mm-1500mm

2.forged round bar

  hot forged steel round astm 4118/18crmo4/20crmo with good quality

1, APPLICATIONS:

usually being used at the quenched and tempered or case hardening state,for the manufacture of non-corrosive media and working temperature below 250 , the medium containing a mixture of nitrogen and hydrogen in the work of a variety of high-pressure pipes and fasteners, the higher the infiltration carbon components, such as gears, shafts and so on.

2, RELATED SPECIFICATIONS:

USA           ASTM 4118

Japan          JIS SCM420

China       20CrMo

4, Process:  EAF+LF+VOD+Forged+Heat Treatment(optional)

5, SIZE RANGE:

Round:

Hot Forged:  80mm-1500mm

6, SURFACE FINISHES:

Black, Peeled(K12), Cold Drawn, Turned & Polished(H10, H11), Precision Ground(H9, H8)

7, Test: Ultrasonic test according to SEP 1921-84

Normalizing

Normalizing temperature: 860-900oC.

Hardening

Harden from a temperature of 850-880oC followed by oil or water quenching. Hardness after quenching is 39-47 HRC.

Tempering

Tempering temperature: 595-700oC.

Forging

Hot forming temperature: 1100-850oC.

Certificate of Quality: issued in English, in addition the normal terms, production process, the mechanical property yield strength, tensile strength, elongation and hardness, forged ratio, UT test result, Grain size, heat treatment methods and the sample of is shown on the Certificate of Quality.

Marking: Heat No. will be cold stamped and Steel grade, diameter mm, length mm, and the manufacturer LOGO and weight kg is painted.

Packaging & Delivery

Packaging Detail: by customers' request

Delivery Detail: within one~two months after receive payment or L/C.

Specifications20CrMo

The higher hardenability non-temper brittleness

very good weldability

form cold cracking

small tendency

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C:0.37/0.44; Si:0.90-1.20; Mn:0.30/0.50;P:Max 0.025;S:Max 0.025,

Cr:4.80-5.50,Mo:1.20-1.50;Ni:Max 0.30  V:0.90/1.10;

Standard: E ASTM A370

Grain Size:6-8

Brinell Hardness: Annealed HB Max 230

Steel ingot:EAF+LF+VD or ESR

Delivery condition: Hot forged +Annealed+Rough Turned.

Or only forged of black surface bars.

As forged condition straightness: Max 4mm/m,  RT bar straightness: Max 2mm/m

As forged diameter tolerance: -0/+8mm; RT diameter tolerance:-0/+3 mm

Non-metal inclusion: as per ASTM E45 A/B/C/D heavy  Max 1.5, thin  Max 1.5

Size: 90mm~800mm

Length: 4.0m and up(Or fix length according the customer requirement).

Inspecting: UTS according to SEP 1921 C/c,D/d,E/e,A388 or GB/T 6402

Cut both ends

Min. qty.: 15MT per size.

Delivery: By both negotiation.(By bulk shippment or By Container)

Other Steel

Carbon Steel:SAE1020,SAE1045,SAE1050,SAE1060;SAE1018,SAE1040,

Alloy Steel: SAE8620, SAE4130,SAE4340, SAE4140, SAE5140;SAE9840,

Tool Steel;:H13

Manufacturer:Baosteel Group Co.,Ltd.