Heat Treatment Forged Steel Bar SCM445 / 50CrMo4 / Din 1.7228 / 4145 Alloy Steel

SCM445 /50CrMo4/din 1.7228/4145 hot forged steel price per kg, forged steel bar, Small MOQ

Applications

AISI 4145H MOD Steel is a chromium molybdenum alloy steel grade widely used in the oil and gas sectors. Similar to AISI 4140 but with a higher carbon content. AISI 4145H MOD Steel is more popular in larger diameters due to its increased strength and harden-ability. AISI 4145H MOD Steel is commonly supplied quenched and tempered with a hardness of between 30 to 36HRc. AISI 4145H MOD Steel is commonly used for a variety of applications in the oil and gas sector. Used often for the manufacture of down hole drilling tools such as drill collars. Other applications include gears, shafts for hydraulic presses, rolls for paper mills, pump shafts and tool holders.

Quality Standard

ASTM A29 Standard Specification for Steel Bars, Carbon and Alloy, Hot-Wrought, General
API 7 Specification for Rotary Drill Stem Elements.

Chemical Composition (%)

METALLURGICAL CONDITIONS

Grain Size: The austenitic grain size shall be 6-9 as defined in ASTM E-112.

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

HEAT TREATMENT

Heat treatment temperatures, including rate of heating, cooling and soaking times will vary due to factors such as the shape and size of eachAISI 4145H MOD Steel component. Other considerations during the heat treatment process include the type of furnace, quenching medium and work piece transfer facilities. Please consult your heat treatment provider for full guidance on heat treatment of AISI 4145H MOD Steel.
Annealing: Heat the steel slowly to 800-850°C and allow enough time for the steel to be thoroughly heated. Cool slowly in the furnace to 480°C followed by air cooling.
Stress Relieving: When parts are heavily machined, ground or otherwise subject to cold work, stress relieving will be beneficial prior to hardening.
Hardening: AISI 4145H MOD Steel is usually supplied ready heat treated to 30-36HRc. If further heat treatment is required annealed AISI 4145H MOD Steel should be heated slowly to 840-875°C and after adequate soaking at this temperature quench in oil. Temper as soon as the tools reach room temperature.
Tempering: Heat carefully to a suitable temperature selected by reference to a tempering chart or table (usually between 550-700°C, soak at the temperature for 2 hours per 25mm of ruling section, then allow to cool in air. Tempering between 250-375°C is not advised as tempering within this range will seriously reduce the impact values of this steel.

SIZE RANGE:

Round:

Hot Forged: 80mm -1200mm

SURFACE FINISHES:

Black, Peeled (K12), Turned & Polished (H10, H11),

Test: Ultrasonic test according to SEP 1921-84

 We, Shanghai Unite Steel are committed to integrate engineering steel resources in china and serve the global engineering steel market. Our company has more than 15 years of experience in steel researching, production, managing and sales. And our team mostly are based on and worked in national famous steel enterprise.

In the aspect of resources and information, we have established cooperative and stronger relationship with nearly hundred enterprises, either state-owned or private owned in china, such as: DAYE Special Steel-a famous steel enterprise with the longest steelmaking history; BAO Steel, and Dongbei Special Steel Group-the biggest special steel manufacturer; TPCO, VALIN-largest seamless steel tube production enterprise; What's more, we have built long, deep and close business relationship with dozens of steel companies, Sharing and holding equities with several steel enterprises. Because of the close cooperation with steel companies and our pioneering spirit, which can ensure us stay at the top competition, and ensure our customers get what they really want!