Shanghai Unite Steel Trading Co., Ltd.

Model Number: hot forged steel bar -31 Brand Name: Unite Steel Key Specifications/Special Features: Forged steel bars, Q+T 4137HIntroduction:4137H forged steel bars Q+T SAE 4137His an H-steel gradealloy steelCommonly called SAE 4137H Chromium-molybdenum steelSAE 4137H offers good ductility and shock resisting properties combined with resistance to wear

With these characteristics it is a popular high tensile engineering steel with a tensile of 850°-1000N/mm

At low temperatures it has reasonably good impact properties

Suitable for a variety of elevated temperature applications

For maximum wear and abrasion resistance the steel can be nitrided to give a shallow depth wear resistant case

Flame or induction hardening of 708M40T can give a case hardness of 50HRc or higher

4137H forged steel bars Q+T chemical composition (%):

• 0.34-0.41% carbon (C)
• 0.60-1.00% manganese (Mn)
• 0.75-1.20% chromium (Cr)
• 0.15-0.25% molybdenum (Mo)
• 0.035% phosphorus (P)
• 0.040% sulfur (S)
• 0.15-0.30% silicon (Si)

Process:EAF+LF+VD+forged+heat treatment (quenching, tempering, annealing, normalizing)

Size range:

• Hot forged: diameter of 80-1200mm
• Surface finishes: black, grinded, rough turned, turned by machine
• Test:ultrasonic test according to SEP 1921-84 C/c, D/d, E/e