PRIOR tolerance control

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PRIOR tolerance control

	Dia	GB standard	DIN standard	PRIOR Tolerance	Special high precision
OD(mm)	4-30	±0.10mm	±0.08mm	±0.05mm	±0.03mm
	31-40	±0.15mm	±0.15mm	±0.05mm	±0.03mm
	41-50	±0.20mm	±0.20mm	±0.08mm	±0.03mm
	51-60	±0.25mm	±0.25mm	±0.10mm	±0.03mm
	61-70	±0.30mm	±0.30mm	±0.15mm	±0.05mm
	71-80	±0.35mm	±0.35mm	±0.20mm	±0.05mm
	81-90	±0.40mm	±0.40mm	±0.25mm	±0.05mm
	91-100	±0.45mm	±0.45mm	±0.35mm	±0.05mm
WT(mm)	0.5-15	± 10%	± 10%	± 5%-8%	±5%-7%

Remarks: the specification of product: outer diameter ∅4mm-76mm, WT 0.5mm-6.0mm, which can be customized
according to the requirements of customers. The tube length is 6M (customised length is okay), the delivery status
is NBK (normalizing), GBK (annealing), and BKS (stress relief annealing). The main material are ST35, ST37.4, ST45,
ST55, ST52.4, etc. Phosphating, galvanization of colored zinc (yellow zinc) and white zinc can be performed for bright
precision seamless steel tubes within the length of 6m according to customer's requirements.