HB500 Steel Grade for Welded Constructions ⋆ by SJ SPARE PARTS

HB500 Steel Grade for Welded Constructions

HB500 is the optimal steel grade for welded constructions with tough wear like edges, bars and flat wear plates in excavator buckets, wheel loader buckets, truck bodies, crushers and other applications with high wear. HB500 gives maximum wear resistance with good weldability and competetive price level. HB500 is a boron-alloyed steel heat-treated by quenching.

Chemical Composition

	C %	Si %	Mn %	P %	S %	Cr %	B %
min max	0,24 0,30	0,15 0,40	1,10 1,40	– 0,025	– 0,040	0,30 0,60	0,0008 0,0050

Mechanical Properties

Hardness Brinell (HBW)	Impact toughness J/cm2	Yield Strength Re N/mm2	Tensile strength Rm N/mm2	Elongation A5 %
475 +/-5%	25-35 (+20 C) 15-25 (-20 C)	1200	1600	6

Gas Cutting

Use working temperature* 100-150 degr C (to avoid cracks and hardness loss.) *Working temp: approx 75 mm from the cut surface.

Heat sensitivity

Hardness retained up to approx 250 degr C, above that the hardness decreases.

Welding procedure

Always clean and preheat the surfaces before welding to reduce moisture. The steel change structure and lose yield strength in the heat affected zone. A too narrow heat affected zone can crack, a wider zone reduce that risk. The heat affect the steel structure and tensile strength above 250 degr C.

From material 20 mm and up always preheat the material to ensure a good working temperature.

Preheat by thickness (approx rec)

Material T [mm]	20	30	40	50
Preheat degr C	150	175	200	225

Welding filler material

Examples by make, always consult your supplier of welding filler material for specific recommendations for your specific needs.

Make	Welding electrode	MAG Wire	MAG Tube
Esab	OK 48.00 OK 74.78	OK Autorod 12.51 OK Autorod 13.09	OK Tubrod 15.17
SAF	Safer ND65	Nertalic	SAFDUAL 100
ELG	P70	Elgamatic 140	DWA 55E
Böhler	Fox BVD90	Nil-IG	Kb52 – FD
Orlikon	Tenacito 65	Carbofil Nil	Fluxofil 40